The head of sperm contains what?

What will be an ideal response?


Answer: DNA

Biology & Microbiology

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The evolutionary species concept states that for a population to be declared a separate species:a

it must have diverged significantly from other populations. b. it must be morphologically different from any other population. c. it must not interbreed with any other population. d. it must occupy a different niche than any other population. e. it must have undergone natural selection sometime in its history

Biology & Microbiology

photosynthesis

What will be an ideal response?

Biology & Microbiology

Figure 29.12 C Use the accompanying figure of a Capsella seed to answer the following question. The embryonic root tip is indicated by the letter ____.

A. A B. B C. C D. D E. E

Biology & Microbiology

A human population will achieve zero population growth if

A) no couple has more than 2 children. B) couples have an average of about 2.25 children each (to account for some children who do not survive to reproduce). C) no couple has more than 1 child. D) the birth rate equals the intrinsic rate of increase r.

Biology & Microbiology