Which of the following is NOT one of the assumptions of Lack's hypothesis?
A) There is no trade-off between a parent's reproductive effort in one year and its survival or reproductive performance in future years.
B) The only effect on clutch size of offspring is in determining whether the offspring survive.
C) The discrepancy between Lack's hypothesis and the behavior of individual birds may sometimes be more apparent than real.
D) All of these are assumptions of Lack's hypothesis.
D
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How does the simple primary and secondary structure of DNA hold the information needed to code for the many features of multicellular organisms?
A) The hydrogen bonding among backbone constituents carries coded information. B) The base sequence of DNA carries the information needed to code for proteins. C) The width of the double helix changes at each gene due to differences in hydrogen bonds. D) The amino acids that make up the DNA molecule contain the information needed to make cellular proteins.
You look outside and realize that your grass needs to be mowed. You pick up the container of gasoline and see that you have approximately a third of a gallon left. You hypothesize that this amount will be enough to mow your entire lawn. Unfortunately, half way through mowing your lawn you run out of gasoline. You grumble and think to yourself that the next time you mow the lawn, you hypothesize
that you will need to have at least two-thirds of a gallon of gasoline available. How did the results of your lawn-mowing experience influence the validity of your new hypothesis for future gasoline needs? A. Your prediction proved that your hypothesis is correct. B. Your hypothesis was supported by trial and error. One more trial added to your data set. C. The hypothesis was invalidated by your experimental evidence. D. Your prediction of future gas needs is based on experimental data and therefore increases the validity of your hypothesis.
What are the two types of aquifers?
A- thick and thin B- shallow and deep C- tapped and untapped D- confined and unconfined E- renewable and nonrenewable
The ________ valve separates the right atrium and ventricle.
a. atrioventricular b. semilunar c. pulmonary d. lunar e. aortic