All of the following are true of puberty EXCEPT
A. sex organs grow and mature.
B. males and females tend to go through puberty at the same age.
C. hormones cause changes in body structure.
D. eggs and sperm begin to be produced.
B. males and females tend to go through puberty at the same age.
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The waterproof cuticle covering the epidermis of land plants helps prevent dehydration, much like the skin of some land animals. As a consequence of having a cuticle, what other evolutionary adaptation was important for most land plants?
A. the endodermis in the root B. root hairs on the root epidermis C. collenchyma fibers just beneath the surface of the epidermis D. stomata in the leaves E. trichomes on leaf surfaces
The molecule shown above is the purine ____
a. thymine b. adenine c. uracil d. guanine e. cytosine
In agricultural genomics, scientists have learned to insert important and advantageous traits from one species into another resulting in higher quality crops and better yields. What do we call it when an organism has traits from another species?
a. alien b. polymorphism c. transgenic d. interdisciplinary
A diuretic is a substance that
A. decreases the permeability of the tubules to water. B. increases the volume of blood. C. decreases the volume of water in the body. D. increases the volume of urine. E. increases the production of ADH.