Hybrid sterility occurs when
1.gametes from two different species won’t combine.
2.a zygote formed by two different species dies as an embryo.
3.two different species don’t recognize each others signals.
4.a hybrid of two different species can’t form viable gametes.
5.a hybrid of two different species can’t form viable gametes after a few generations.
4
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Indicate the scenario(s) that could directly result in sympatric speciation. Check all that apply.
_____ Two sunflower species cross to form a healthy hybrid individual with equal copies of chromosomes from each parental species. _____ A new river channel divides a population of beetles into two populations. _____ A large fence blocks the intermingling of two populations of a species. _____ A subset of flies within a larger population colonizes a new host plant. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about sympatric and allopatric speciation? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
If a person has been prescribed eyeglasses with lenses that shorten the path of light, the correction is for
A. farsightedness. B. nearsightedness. C. astigmatism. D. cross-eyed vision. E. None of the answer choices is correct.
Autosomal recessive traits
a) occur in one-quarter of all offspring b) can skip generations c) are exhibited only in the offspring of two heterozygous parents d) occur more frequently in females than males e) all of the above answer choices are correct
What is the purpose of glycolysis?
A) It produces oxygen. B) It breaks down glucose into pyruvate, releasing energy. C) It uses ATP to make glucose. D) It breaks down pyruvate to release energy.