Master Biology with Fun Quizzes & Brain Teasers!

What macromolecules contains phosphorus as part of a phosphate group?
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You are an organic being, and as such, you are part of the Carbon cycle. Describe your role as part of this cycle
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A(n) _____ is a deposit of soil and sand at the mouth of a river or stream. erosiondeltachannelglacier
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Gut bacteria are microorganisms that live in our digestive tract and have a mutualistic relationship with humans. These bacteria obtain nutrients from the digestive system and produce vitamin K for humans. Vitamin K is necessary for blood clotting to heal wounds in humans. Without these gut bacteria would be disrupted in a human?
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Where did the alleles (or letters) of each individuals genotype originate or come from?
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Wild Soay sheep live in a cold environment on a small Scottish Island. The sheep used to be large because they gained extra weight during the summers in order to survive the harsh winters. A recent change in the Island's climate has cused grass to be available for a longer perlod each year, so survival conditions for the sheep have become less challenging. Researchers who study these sheep have most likely observed a decrease in the wild Soay's
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When cloning an organism, who will the clone be most similar to: body cell donor, egg cell donor, or surrogate mother? Why?
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Please help me with this. in a 250-word report, answer the following questions.what happens in the light reaction of photosynthesis?what happens in the dark reaction of photosynthesis?what five factors affect photosynthesis and its rate? how?
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Worth 30 pts!!!within a population of rabbits, black fur (b) is dominant over white fur (b). a scientist observes 22%white rabbitson an island. calculate the allelicand genotypic frequencies for the population by solvingfor p, q, p2, 2pq and q2. please help!!! worth 30
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In the following food chain, what would happen if insecticides were applied to the ecosystem, killing all the caterpillars?Herbaceous PlantsCaterpillarsSparrowsEagles A. The sparrows will be forced to feed on the herbaceous plants rather than the caterpillars, leaving the sparrows more vulnerable to the eagles. B. The herbaceous plants may become underpopulated. C. The sparrows may starve if they cannot find another food source, causing the subsequent possible starvation of the eagles. D. The sparrows and eagles may become overpopulated
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Contrast the effects bacteria have on the body to the effects that parasites have
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Which idea about dj vu does the title of the selection support?A. Dj vu usually happens spontaneously. B Researchers are eager to learn more about dj vu. C A person experiencing dj vu may feel momentarily confused. D People who experience dj vu ask many questions
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A doctor is trying to diagnose a patient with short stature. she plots the girls growth in red on the growth chart below to compare it to the typical growth rates, which are shown in black. a graph titled stature for age percentiles: girls, 2 to 20 years. the graph shows lines ranging from 60 to 70. the red line falls at 54. based on the data, which of the following is the most likely diagnosis? gigantism an underactive pituitary gland an overactive pituitary gland an overactive adrenal gland
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Discuss how human impact on the environment that could lead to a change in an organism's dna and alter the growth and reproduction of individuals. please provide an example of an organism.
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1 pointgregor mendel's work helped to support thea. theory of natural selectionb. role of dna in reproductionc. observed phases of cell divisiond. belief in meiosis and mitosis
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What happened to the sound wave when it encountered air of a different temperature?(A) The sound wave changes speed and direction, bending away from the denser air and towards less dense air. (B) The sound wave changes speed and direction, bending away from the less dense air and towards more dense air(C) The sound wave changes direction but not speed, bending away from the less dense air and towards more dense air. (D) The sound wave changes direction but not speed, bending away from the denser air and towards less dense air
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How is it possible for a vesicle to form from one organelle and then be crazy aandactually become a part of another organelle? (Hint: what surrounds them).
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In some cases, our bipedal adaptations have changed areas of our bodies so much that it is difficult (if not impossible) for these areas to perform other functions. For example, our pelvis provides the areas of muscle attachment that we need, but its unusual shape makes human childbirth more difficult. The foot is another area that reflects the impact of bipedal specialization. What foot traits and corresponding functions seen in other primates has been lost in our feet, why would we have lost helpful features such as this?
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In cats the trait for hair length is controlled by gene S, where the dominant allele(S) results in short hair and recessives have long hair. The W gene is known as the "masking" gene because a cat that has a dominant W allele in its genotype will have an all-white coat due to a lack of melanin in its skin. Cats with a ww genotype can have a coat of any color, depending on the inheritance of other genes that determine coat color. A male with long hair and a white coat is crossed with a female cat with short hair and a white coat. The owner of the cats has heard about the masking gene and believes that the cross will produce a litter of all-white kittens, some with short hair and some with long hair. (a) is the owner's prediction accurate? give evidence to support your response. (b) Based on the given information, determine all of the possible genotypes of the kittens in the litter
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What is the relationship between an organisms fundamental niche and its realized niche
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In walruses, males defend a large harem of females and will fight with other males to maintain dominance and access to their harem. however, there are some males that are smaller and will mimic female walruses, hiding among them and occasionally mating with them. researchers observed a walrus population and found that there were 75 offspring produced. of those, the female mimic male was the father of 25, the dominant males was the father of 50 and each of the 75 females produced one offspring. what was the fitness value of one female?options:1.0.50.10.01
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Based on the hierarchy of life, what two things can be implied and why?
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If the gene encoding the enzyme rubisco is mutated such that it is nonfunctional, the process that would be affected is the ability to select one or more: a. fix carbon. b. make atp. c. harvest photons. d. make o2.
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Propose an experiment to test the rate of meat digestion in animals with differing amounts of the enzyme pepsin in their digestive tracts. Be sure to include the independent and dependent variables, along with the specific procedure and materials to be used
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