Type I survivorship curves
a. are characteristics of humans and elephants.
b. typify a population in which all ages have
an equal chance of survival.
c. indicate a high mortality rate in the very
young.
d. show that very few young are produced,
that each is given parental support, and that
most individuals live a relatively long life
and die of old age.
e. are typical of annual plants
D
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Currents in the ocean basins of the Northern Hemisphere always run in what direction?
A. clockwise B. from the poles to the tropics C. from the equator to the poles D. north to south E. counterclockwise
Which of the following water uses is estimated to be the highest in human society?
A) industry B) sewage systems C) households D) agriculture
Investigators performed nuclear transplant experiments to determine whether DNA is altered irreversibly during development. Which of the following statements about these experiments is true?
(a) Because the donor nucleus is taken from an adult animal, the chromosomes from the nucleus must undergo recombination with the DNA in the egg for successful development to occur. (b) The embryo that develops from the nuclear transplant experiment is genetically identical to the donor of the nucleus. (c) The meiotic spindle of the egg must interact with the chromosomes of the injected nuclei for successful nuclear transplantation to occur. (d) Although nuclear transplantation has been successful in producing embryos in some mammals with the use of foster mothers, evidence of DNA alterations during differentiation has not been obtained for plants.
Eggs and larva are developmental forms of various parasites called ________.
Fill in the blank(s) with the appropriate word(s).