Estrogens stimulate the development of ________

A) breasts
B) a low-pitched voice
C) sperm production
D) facial hair


A

Biology & Microbiology

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Radioactive isotopes are used in dating materials from the distant past. Which of the following statements about radioactive dating techniques is true? 

A. It gives the general ages of rock strata. (±1 million years). B. It gives exact ages of rock strata. (± 1 year). C. It uses a technique in which the degree of radioactive decay is measured, the younger the rock the more radioactive decay. D. It uses a technique in which the degree of radioactive decay is measured, the older the rock the more radioactive decay. E. It does not work well with fossil remains that have not absorbed radiation.

Biology & Microbiology

Lymphoid tissues are always highly organized cellular complexes.

Answer the following statement true (T) or false (F)

Biology & Microbiology

Suppose after bacterial conjugation, the recipient cell contained the a and b genes. From this information, what can

you conclude?

a. The donor cell was unable to make contact with the recipient cell. b. The donor cell was F-. c. The donor cell produced an abnormal sex pilus. d. All of the genes could not fit through the sex pilus at one time. e. The sex pilus was broken before the rest of the genes could be transferred.

Biology & Microbiology

The bone tissue that consists of units called osteons is called _____ bone tissue

Fill in the blank(s) with correct word

Biology & Microbiology