Biology High School
Answers
Answer 1
Answer:
The correct answer is - option A.
Explanation:
Reproductive barrier is a biological difference between two species that do not allow them to interbreed. Type of reproductive barrier is decided by the trait or barrier that prevents them to interbreeding.
habitat isolation takes pace when the prezygotic barrier that prevents interbreed two species due to the fact that they live in different area as insects that lives in golden rod and autumn daisy have different habitat.
Thus, the correct answer is - option A.
Answer 2
The reproductive barrier is defined as the biological isolation between two species that prohibits them to interbreed.
The correct answer is:
Option A. Habitat isolation
Habitat isolation can be defined as:
Habitat isolation is defined as a type of reproductive barrier that prevents the interbreeding between the organisms.
Habitat isolation does not mean that the organisms living in different areas are unable to reproduce.
The organisms living in the same geographical area but unable to interbreed because one of them lives on goldenrod plants and the other on autumn daisies is referred to as habitat isolation.
Thus, the correct answer is Option A.
To know more about habitat isolation, refer to the following link:
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Related Questions
Arrange the following levels of organization starting from smallest and going to the largest.
A. Habitat
B. Biosphere
C. Climate zone
D. Ecosystem
Answers
Answer:
-Habitat
-Ecosystem
-Climate Zone
-Biosphere
Answer:
The person above me is wrong.
Correct Answer:
1. Biosphere
2. Biome
3.Ecosystem
4. Habitat
Explanation:
Which of the following statements is false? Unselected We clear and swallow over 2 million alveolar macrophages per hour. Unselected Alveolar surfaces are usually sterile. Unselected Remarkably efficient alveolar macrophages crawl freely along the internal and external alveolar surfaces. Unselected Huge numbers of infectious microorganisms are continuously carried into the alveoli.
Answers
Answer:
Remarkably efficient alveolar macrophages crawl freely along the internal and external alveolar surfaces
Explanation:
The alveolar macrophages are present on the internal lumenal surfaces of the alveolar ducts, the alveoli, and the bronchioles.
Alveolar macrophages are phagocytes that uses several surface receptors to release many secretions, to interact with other cells and molecules.
But the alveolar macrophages are intact to the inner surface only and do not crawl freely along the internal and external alveolar surfaces.
Hence, the correct option is " C".
The function of the choroid layer of the eye is to ________. The function of the choroid layer of the eye is to ________. regulate the amount of light entering the eye prevent light from scattering inside the eye produce gross eye movements release tears onto the anterior surface of the eye refract light and focus it on the retina
Answers
Answer:
The answer is "prevent the light from scattering inside the eye".
Explanation:
Choroid layer is located behind the retina in the eye and it's function is to adjust the amount of light absorbed and prevent it from scattering inside the eye to achieve a clear and focused image.
I hope this answer helps.
Individuals in the __________ adulthood stage tend to feel more responsible, more capable, and more financially independent than adolescents, yet they feel less capable than adults. A. Older B. Middle C. Young D. Emerging
Answers
Answer:
D.) Emerging
Explanation:
Answer:
D
Explanation:
How is the earth protected from the sun’s particles? Select one: a. The earth’s magnetosphere protects it b. The sun is 93 million miles away, and the particles do not impact the earth. c. The earth is not protected from solar particles. d. The heliosphere protects the earth.
Answers
Answer: A.
Explanation: The Earth has a magnetic sphere that protects it from the sun's particles. Even though the particles take a while to travel to Earth, whenever they are deflected that is what causes the Northern Lights.
How can we determine the velocity of a star moving toward or away from Earth? a. By looking at the color of the star. b. By the shift of its spectral lines. c. By the brightness of the star. d. By its change in apparent size.
Answers
Answer:
Hello!
Your answer should be B. By the shift of its spectral lines.
Explanation:
It is known that when studying space, to tell if a star is moving TOWARDS EARTH its measurements will move towards the RED side of the Spectrum...
MOVING AWAY will mean its measurements will move towards the BLUE end!
HOPE THIS HELPS!
itsMATT04
{i did a bit of research from revision guides so there may be some similar phrases! :)}
After surgical removal of the spleen (i.e., a splenectomy), some other organs take over most of its functions. Which of the following spleen functions in the adult can not be performed by bone marrow?
A) immune surveillance
B) erythropoiesis
C) removal of aged and damaged red blood cells from the blood
D) storage of platelets
Answers
Answer:
removal of aged and damaged red blood cells from the blood
Explanation:
Spleen is an organ found in vertebrates and it is located in the upper part of the abdomen that act majorly to filter blood. It recognizes and removes old, malformed, or damaged and aged red blood cells. When blood flows into the spleen, the spleen performs "quality control"; the red blood cells must pass through a maze of narrow passages.
The bone marrow is a spongy tissue that produced red blood cells and this perform similar function as the spleen except that it cannot remove aged and damaged red blood cells from the blood this is because it does not have the ability to remove age and damage red blood cells due to inability to support the immune system.
The spleen help remove age and damage red blood cells thereby boosting the immune system in fighting against infections ,preventing blood clot .
A scientist thinks that a certain chemical is a mutagen. She exposes plant cells to a large amount of this chemical in the laboratory.
Which statement best provides evidence that the substance is a mutagen?
The cells die within hours of being exposed to the chemical.
The cells grow more quickly than those that were not exposed to the chemical.
The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
The cells continue to divide at the same rate as before they were exposed to the chemical.
Answers
Answer:
The cells change after being exposed to the chemical, and this change is passed to the next generation of cells.
Explanation:
A mutation is any change, whether big or small, that occurs to the nucleotide sequence of a gene in a cell as caused by mistake during replication or induced by a mutation causing substance. These mutation-causing substances are called MUTAGEN.
A MUTAGEN is any substance that causes genetic mutation in an organism's cell. These changes in the nucleotide sequence can affect one or more phenotypic characteristics of the affected organism, which is also passed to offsprings because it is a genetic change.
Hence, a plant cell exposed to this mutagen will be induced to mutate.
Hence, the cells changing after being exposed to the chemical, which is also passed to the next generation of cells best provides explanation that the chemical is a MUTAGEN.
Answer:
C
Explanation:
did on test
Even after Timon read "Psychedelics for Dummies," he was unable to produce LSD in the lab. He decided he would have to find a hallucinogen naturally. Therefore, he should look for which naturally occurring hallucinogen?
Answers
Answer:
The correct answer is - Psilocybin, Mescaline and LSD
Explanation:
Hallucinogens are various drugs or medications that change an individual's awareness with their environmental factors just as their own contemplations and emotions.
A hallucinogen is a psychoactive medication or drug that regularly or normally causes hallucination, perceptual peculiarities, and other significant subject changes in thought, feeling, and cognizance that are not ordinarily experienced to such degrees with different classes of medications. these could be synthetic or naturally occurring. The natural occurring hallucinogens are Psilocybin, Mescaline and LSD and other
Thus, the correct answer is - Psilocybin, Mescaline and LSD
The Grey Cat.
Each day you take a walk at a different time following the same route. Along your path there is a bus stop with a bench located at the bottom of a hill. Upon this bench sits a grey cat. Each day, as you pass this grey cat, you say “hello cat”. You’ve recognized that each day, as you do this, a bus consistently comes over the hill. The consistency of this events sparks your interest, it seems to go beyond the possibility of coincidence. In order to satiate your curiousity you have decided to design an experiment to investigate the anomoly.
Working with just the information provided, create a GOOD Hypothesis about the above scenario. Generate an experiment to test your hypothesis, and write an experimental design. Your experimental design writeup must clearly define all essential aspects of the experiment.
Note: Avoid suppositions at all cost! Work with only the information provided. This is science.
Answers
Hypothesis: There is a synchrony between the time the bus passes over the hill, the time the cat is positioned on the bench and the time I talk to the cat.
An experiment will be established to prove or deny this hypothesis. This experiment will try to answer if there is a synchrony between the bus, the cat and me.
First, I will write down the time I usually leave the house for the bus stop and then I will look for a schedule of the buses in my city, to evaluate the times when each one passes above the hill to which I refer.
It is necessary that I clock the time spent between my home and the bus stop to which I am going, so that I can relate to the bus schedule.
I must also install a camera system at the bus stop to observe the times the cat arrives at that location.
Every day, for a month, I will write down the time I left home, the time I arrived at the bus stop, the time the cat arrived at the bus stop and the time the bus passed. At the end of this period, I will do average calculations to find out how many times our schedules have been synchronized. Through these data I will conclude whether the hypothesis is false or true.
Assume that the point mutation and deletion mutation are not in overlapping regions of the phage genome. What phage recombinants would you expect if a crossing-over event occurred between the regions of the two mutations?
Answers
Answer:
A recombinant phage containing both mutations.
Explanation:
A recombinant organism is produced by recombination, which is a genetic phenomenon associated with the repair of double-strand breaks in DNA. In genetic research, recombinant organisms are used to investigate target gene expression. The process of DNA repair may be associated with two different pathways: hom*ologous recombination (HR) and non-hom*ologous end-joining (NHEJ). In this case, the recombinant phage contains no overlapping mutations (i.e., both deletion and point mutations), thereby carrying the desired genetic combination.
Study the equation for photosynthesis.
A scientist notices an increase in the glucose
production in the plants he is studying. What are the
possible reasons? Check all that apply.
6CO2 + 6H2O
Light energy
→ Cg H12O6+ 602
Chlorophyll
The plant was exposed to more intense light
The plant was exposed to less intense light
The plant absorbed more carbon dioxide.
The plant absorbed less carbon dioxide.
The plant absorbed more oxygen.
The plant absorbed less oxygen.
Answers
The plant was exposed to more intense light
The plant absorbed more carbon dioxide.
The production of glucose increase in plant cells when the intensity of light is increased and the amount of carbon dioxide absorbed is increased. These affect the rate of reaction.
What is Photosynthesis?
Photosynthesis is the process of formation of glucose (sugar) in the green cells of plant. Photosynthesis takes place during the daytime as it requires sunlight to proceed the reaction. The reaction takes place in the chloroplast of plant cells.
Factors which affect the rate of photosynthesis are light intensity and carbon dioxide concentration. Light intensity is directly proportional to the rate of photosynthesis, as the intensity of light increases the rate of photosynthesis also increases.
Similarly, carbon dioxide is also proportional to the rate of photosynthesis as carbon dioxide is a reactant in this process. With the increase in the amount of reactants, the rate of a chemical reaction increases and hence more product is formed.
Learn more about Photosynthesis here:
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Which human activity can produce disruption of fish breeding habits, increase in mosquito population, and flood control? construction of dams to produce electricity habitat destruction that decreases beaver population increased erosion due to improper farming techniques overfishing in artificial lakes
Answers
Answer:
A
Explanation:
edge
The construction of dams to produce electricity is a human activity that can produce disruption of fish breeding habits.
Human activities which have the potential of affecting the ecosystem are called anthropogenic activities. These activities could have a lasting impact on the ecosystem such as disruption of fish breeding habits.
Dams are structures built in water for the purpose of irrigation or electricity generation. The construction of dams to produce electricity is a human activity that can produce disruption of fish breeding habits, increase in mosquito population, and flood control.
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Answer these:
1) What is bone marrow?
2) Where is it located?
3) Can one live without a bone marrow?
4) What is bone marrow made of?
Kratika Please hurry and answer, you have always helped me.
Answers
Answer:
These are the answers:
1) Bone marrow is a spongy tissue inside some of our bones.
2) It is located at the ribs, bones of the pelvis and vertebrae,e.t.c.
3) Yes!, A person can live without a bone marrow only if they receive regular blood transfusions.
4) Bone marrow is made up of large bones.
Explanation:
A bone marrow is where new blood cells are produced.
Hope it helps.
In a hydrogen ion pump, the energy is used to join small molecules together to make larger ones. Which factor most likely has the greatest effect on the number of molecules mitochondria can produce?
Answers
Answer:
The amount of energy the flowing H(+) ions have
Explanation:
Hope it helps.
Answer:
B
Explanation:
APEX
After reading the paragraph below, answer the question that follows In the North Pacific Ocean, two groups of the same species of killer whales (Orcinus orca) appear to be forming two different species based on what they eat. One group eats fish and the other eats mammals such as seals. Another difference between the two groups is in how they hunt. Whales that hunt fish tend to travel in large pods (groups of whales) and vocalize often. Whales that hunt seals, however, tend to travel in very small groups and vocalize very little. If these hunting differences brought about speciation, the separation would be considered:____________
Answers
Answer:
behavioral separation
Explanation:
The separation leading to the speciation of the two groups of killer whales would be considered a behavioral separation.
Behavioral separation or isolation is a form of separation that occurs between two groups of individuals (that use to be of the same group) as a result of preference for a particular behavior or set of behaviors.
The preference for the behavior eventually leads to the two groups becoming separate species, a form of speciation known as sympatric speciation.
a cell "x" contain a cell wall large central vacuole and a nucleus at the periphery . cell"x"is __________ options 1) plants cell 2) animal cell 3) bacterial cell 4) prokaryotic cell
Answers
Answer:
plant cell
Explanation:
Plant cells have a cell wall to maintain cell shape. They also have a large central vacuole for water storage and a nucleus at the periphery.
Hope that helps.
Which statement correctly compares the pH of water to that of other substances?
he pH of water increases as its temperature increases, while other substances have a stable pH.
The pH of water is neutral; it is higher than the pH of acids and lower than the pH of bases.
Water contains more hydrogen ions than most other substances, giving it a higher pH.
Water is neutral and has a pH of 0; acids have a pH greater than 0, and bases have a pH less than 0.
Answers
Answer:
The pH of water is neutral: it is higher than the pH of acids and lower than the pH of bases.
Explanation:
Pure water has a pH of 7 which is right on the center of the pH scale which ranges from 0 to 14. This is why it sometimes acts as a reference point for acids and bases alike. Hope this helps. :)
Which organism in the food web below is likely to store the least energy?
boa constrictor
beetle
coati
poison dart frog
sloth
strangler fig
fungus
fruit bat
O A. Sloth
B. Fruit bat
O C. Strangler fig
O D. Boa constrictor
Answers
Answer:
a-Sloth
Explanation:
organisms low in the food chain will store the least energy, like plants, flowers, grass, that sorta thing.
Thylakoids contain clusters of chlorophyll and proteins known as . They absorb sunlight and generate high-energy that pass along the .
Answers
Answer:
1) Photosystems
2) Thylakoid membrane
Explanation:
Photosynthesis is an important phenomenon for the cells of autotrophic organisms like green plants. It is the process through which they obtain their energy source. Photosynthesis, which consists of two stages, occurs in the Chloroplast of the cell.
The light dependent stage occurs in the thylakoid lumen of the CHLOROPLAST while the light independent stage occurs in the stroma. The thylakoid is a membrane-bound sac usually organized in stacks called GRANA.
The Chlorophyll pigment, which captures the photon of light needed for the photosynthetic process, is contained in the thylakoid. Also, embedded in the thylakoid space are protein complexes called PHOTOSYSTEMS, which are involved in the capturing photons of light and transferring of electrons. The Photosystems 1&2 are the functional units of photosynthesis.
The high energy generated by the Photosystems are transferred from one electron carrier to another along the thylakoid membrane in order to generate ATP and NADPH. This process is called Electron transport chain.
Thylakoids are the membrane-bound structures present within chloroplasts of the plant cell. Thylakoids consist of photosystems and are surrounded by the thylakoid membrane.
The correct blanks for the given statement are:
Thylakoids contain clusters of chlorophyll and proteins known as photosystems. They absorb sunlight and generate high energy that passes along the thylakoid membrane.
Photosystems in the thylakoids are the structural and functional protein complexes, which play a crucial role in performing photosynthesis. These systems are present along the thylakoid membranes, and carry out the primary photochemistry of photosynthesis.
The thylakoid membrane is involved in the light-dependent reactions of photosynthesis. The membrane absorbs light energy and is then converted into chemical energy. The high-energy generated is passed along the thylakoid membrane.
Therefore, the correct answers are photosystems and thylakoid membrane.
To know more about thylakoid, refer to the following link:
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relation of acceleration of a body to its mass and applied force..
Answers
Answer:
The more mass a body has, more force needs to be applied for it to accelerate.
Explanation:
The relation of acceleration of a body to its mass and applied force is discussed in Newton's second law of motion.
Newton's second law of motion states that the more mass a body has, more force needs to be applied for it to accelerate.
Answer:
The Newton's second law of motion come with an explanation for the behavior of the objects when forces are applied to the objects. It states that external forces cause objects to accelerate.
abstract excretion in animals
Answers
Given that,
Abstract excretion in animal,
Excretion in animal :
Excretion in animal is defined as the elimination of metabolic,or nitrogenous waste products from the body of an organism.
Type of excretion are,
(I). Ammonotelism
In this type of excretion the excretory product is ammonia.
(II). Ureotelism
In this type of excretion the excretory product is urea.
(III). Uricotelism
In this type of excretion the excretory product is uric acid.
(IV). Aminotelism
In this type of excretion the excretory product is amino acid.
(V). Guanotelism
In this type of excretion the excretory product is guanine.
Perhaps you and/or your significant other is a carrier of a harmful recessive trait, such as cystic fibrosis. What would you do when considering having children? Would you hope for the best and ignore the situation, or would you see a genetic counselor or what?
Answers
Answer:
At birth the baby would indicate the FEIM laboratory examination or genetic analysis prior to delivery.
Explanation:
The FEIM laboratory examination is carried out by extracting a portion of blood from the newborn child, and is necessary for the accurate diagnosis of diseases such as cystic fibrosis and others such as HIV, etc.
Which statement best describes a cause and its effect that occurs during the process of muscle contraction?
Answers
Answer:
Muscle contraction can be explained by sliding filament theory.
1. Activation of muscles: the motor nerve generates an impulse to transfer signals from neurons to neuromuscular junction. This stimulates sarcoplasmic reticulum to release calcium into the muscle cells.
2.Contraction of muscles: calcium in the muscle cells binds with troponin causes actin and myosin to bind. Actin and myosin in the muscle binds and contract by utilizing ATP as a source of energy.
Imagine that a newly discovered species of fish normally has three eyes (E), but the rare mutation (ee) causes "diopthalmic" fish with two eyes to be born. In addition, eye color in these fish is inherited similarly to humans, with black eyes (B) being dominant to blue (bb). Assuming these two genes are carried on separate chromosomes, what must the genotypes of two black-eyed, three-eyed parents be if they have a blue-eyed, diopthalmic son
Answers
Answer:
Heterozygous with BbEe and BbEe
Explanation:
The genotypes of the two parents must be heterozygous.
From the illustration, E codes for three eyes while ee causes diopthalmic. B causes black eye while bb codes for blue eye.
Black eye genotypes could be BB or Bb.
Three eye genotype could be EE or ee.
A black eyed, three-eyed couple produced blue-eyed (bb), diopthalmic son (ee). From the law of inheritance, the son inheritance the alleles for each trait from the two parents, one from each. Hence, it means that each of the parent posses recessive alleles in their genotypes, that is they are heterozygous for the two traits.
BbEe x BbEe
9 BBEE black-eyed, three-eyed
3 B_ee Black-eyed, diopthalmic
3 bbEe Blue-eyed, three-eyed
1 bbee blue-eyed, diopthalmic
Which of the following is NOT a frameshift mutation?
A. Deletion
B. Insertion
C. None of these
D. Inversion
Answers
Answer:
Inversion
Explanation:
The frameshift mutations are -Base Substitutions
-Deletions
-Insertions
HOPE IT HELPS :)
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The type of mutation that is not a type of frame-shift mutation is inversion.
FRAME-SHIFT MUTATION:
A frame-shift mutation is a kind of mutation that causes the manner in which a nucleic acid sequence is read in the genetic code.
Frame-shift mutation can occur via two major means as follows: deletion and insertion.
Deletion mutation occurs when a nucleotide base is removed from the sequence while insertion mutation occurs when a nucleotide base is added to the sequence.
Deletion and insertion causes the sequence of nucleotides in DNA to be shifted. Therefore, the type of mutation that is not a type of frame-shift mutation is inversion.
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Question
Q2. A student places peaches into a pure water solution
Give two differences you would expect to find in the water
after ino hours.
Answers
Answer:
The correct answer - peaches will swell.
Explanation:
In the hypotonic solution, solution has a higher water potential than that of the cell of peach, so water will move from a region of higher water potential to a lower water potential across via osmosis.
Peaches have more solutes than pure water as it has higher sugar content than pure water. Hence, endosmosis will take place which means the water molecules will move from outside to inside of the peaches through wall of peaches takes place. Due to this, peaches will swell eventually.
Thus, the correct answer - peaches will swell.
What usually happens to the host’s DNA during the lytic cycle? It is destroyed. It is integrated with the viral DNA. It becomes a provirus. It is deactivated.
Answers
Answer:
It is destroyed
Explanation:
The lytic cycle of the viral life cycle is characterized by the destruction of the host's DNA. The infecting phage gains entrance into the host's cell synthesizes proteins that break down the host's DNA, and then utilizes its own DNA as the cellular DNA.
From there on, the phage takes over the cell's genetic mechanisms and utilizes it in the synthesis of the necessary proteins to manufacture new infecting structures.
Answer:
destroyed
Explanation:
describe the three stages of germination
Answers
Answer:
Germination is the process by which the seed embryo begins growth. A seed is considered to have germinated when the embryonic root emerges from the seed coat. ... Three major stages in the germination process are the imbibition of water, increased metabolic activity, and swelling of cells.
Answer:
The three stages in the germination are the imbibition of water, increased metabolic activity, and swelling of cells.
Explanation:
A marine biologist discovers a new marine animal that has a coelom, but it does not develop from the mesodermal tissues. Under which category should she classify this animal? A. pseudocoelomate B. acoelomate C. coelomate
Answers
B. acoelomate
Hope it helps
