Which of the following is not a strength of molecular phylogenies?

A. The molecular clock can help us date divergence events based on genetic information from organisms
B. DNA is somewhat less subjective than morphological traits, and therefore more straightforward to compare
C. All organisms have genes, so their genetic sequences are theoretically comparable
D. We can always acquire DNA


Answer: D. We can always acquire DNA

Biology & Microbiology

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The organs in females that produce the sex hormones and the eggs for reproduction. _____

A) Endometrium

B) Testis

C) Cervix

D) Uterus

E) Oviduct

F) Ovaries

G) Vagina

H) Seminal vesicle

I) Penis

J) Prostate gland

K) Vas deferens

L) Glans penis

Biology & Microbiology

Which of the following is NOT an environmental issue associated with the consumption of meat and dairy products?

A. production of greenhouse gases B. production of nitrogenous wastes C. energy consumption and inefficiency D. consumption of land and water resources E. All of the above are environmental issues associated with meat and dairy consumption

Biology & Microbiology

In humans, fertilization occurs in the

A) vagina. B) ovary. C) uterine tube. D) uterus. E) testes.

Biology & Microbiology

Natural selection is regarded as a theory because:

A) other equally acceptable scientific mechanisms for evolution exist. B) it is a general principle, supported by a wide variety of evidence. C) it has not been tested. D) it has been tested and found to be untrue.

Biology & Microbiology