What can a human population's age pyramid tell you about current and future needs?
A. How many resources would be needed for health care
B. How many workers will be needed to support retirees
C. How many schools to build or to close down
D. All of the above
Answer: D
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Blood vessels that connect networks of capillary beds are
(a) arteries. (b) veins. (c) portal veins. (d) both b and c.
A G protein:
A. is a component of a signal-transduction pathway that is coupled to a G proteincoupled receptor. B. is composed of three subunits and is inactive when bound to GDP. C. releases GDP and binds to GTP when associated with an activated receptor. D. becomes deactivated when bound GTP is dephosphorylated to GDP. E. All of these choices are correct.
Answer the following statements true (T) or false (F)
1. If a woman in her late forties wants to have a baby and seeks medical advice, she would most likely be advised of the risks related to nondisjunction occurring and a higher rate of fetal chromosomal abnormality. 2. Identical twins result from one zygote splitting into two genetically identical embryos. 3. Without genetic diversity, a population might more easily fall victim to parasites and pathogens. 4. Caenorhabditis elegans is a hermaphrodite, which means it only undergoes sexual reproduction. 5. In animals, each gamete arises from a diploid cell containing two sets of homologous chromosomes.
The genetics inherited by an individual will completely control their behavior.
Answer the following statement true (T) or false (F)