By weight, the bulk of a plant's organic material is derived from:
a) atmospheric nitrogen.
b) soil minerals.
c) carbon dioxide.
d) water.
e) oxygen.
Ans: c) carbon dioxide.
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Imagine that a coyote tobacco plant is being eaten by M. sexta caterpillars. In response to these specific herbivores, the tobacco produces volatile chemicals that can travel through the air. Why?
A. to signal to other tobacco plants that caterpillars are in the area B. to produce an odor that will deter other caterpillars from eating its leaves C. to attract insect predators that will eat the caterpillars D. to signal to other parts of the plant to produce more nicotine
Progressive chromosomal changes as cancer develops are related to the loss of the ability to repair ____________________ in cancer cells
Fill in the blank(s) with correct word
If a trait is X-linked dominant, who would express the trait?
A) females homozygous for the dominant allele and males hemizygous for the recessive allele B) heterozygous females and males hemizygous for the dominant allele C) females homozygous for the recessive allele and males hemizygous for the recessive allele D) females homozygous for the recessive allele and males hemizygous for the dominant allele E) significantly more females than males
Which of the following subatomic particles has appreciable mass and lacks a charge?
a. neutron b. element c. electron d. proton e. molecule