Which of the following statements is TRUE?
a. The products of a reaction can have less
energy than the reactants.
b. The products of a reaction can have more
energy than the reactants.
c. Reversible reactions tend to approach
equilibrium.
d. Many reactions are reversible.
e. All of these are true
E
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The beginning of pregnancy is marked by:
A. ovulation. B. fertilization. C. implantation. D. more than 24 weeks of gestation.
The first group of cells to migrate through the blastopore will become
A. neurons of the brain. B. neurons of the peripheral nervous system. C. notochord. D. epidermis. E. yolk plug.
When different forms of a trait are becoming more or
less common over successive generations, what is taking place? a. natural selection b. adaptation c. survival of the fittest d. evolution e. none of these
Golden rice:
a) could help the 250,000 children each year who are at risk of blindness due to vitamin A deficiency. b) supplies more protein. c) grows without a husk, thereby reducing the processing required before it can be consumed. d) supplies more vitamin A in one serving than an individual needs in a full week. e) can make vitamin A without beta-carotene.