Which trait provides a survival advantage?
A) A shrub that loses the ability to make seeds
B) A brightly colored fish that attracts predators
C) A flower that attracts more bees
D) A horse that lacks the ability to digest either grains or grass
E) A tree that grows shorter than the surrounding trees
C
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Which examples would be considered different species under the biological species concept? Check all that apply.
_____ Two bear species are able to breed in zoos, but have separate ranges in nature. _____ Two skunk species look morphologically similar, but are unable to interbreed. _____ Two snake species look different, but often form fertile hybrids. _____ Two plant species with no gene flow between them. _____ Two tree species have different leaf shapes, but form hybrids in their overlapping ranges. 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 the biological species concept? 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?
The Hardy–Weinberg principle specifies the conditions under which a population of diploid organisms achieves ____
a. progressive evolution b. allopatric speciation c. adaptive radiation d. punctuated equilibrium e. genetic equilibrium
In bacteria, initiator tRNA carries formyl methionine.
Answer the following statement true (T) or false (F)
Which one of the following is TRUE regarding skin?
A) Beneath the dermis is the basement membrane, which separates the dermis from the hypodermis. B) Keratin is a protein in the cells of the epidermis that provides strength and waterproofing. C) Melanocytes and keratinocytes are two skin cell types that are prevalent in the dermis. D) The sebaceous glands and the sweat glands are two types of endocrine glands located in the dermis. E) Melanocytes produce calcium, which strengthens the skin.