What characteristic do fairy shrimp that live in temporary, fast-drying desert ponds have in
common with pioneering species?
a. They reach sexual maturity and reproduce in a short time period.
b. They have the ability to become established in disturbed habitats.
c. They disperse quickly and spread widely.
d. all of these
A
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Answer the following statements true (T) or false (F)
1. Modern humans show a type I survivorship curve. 2. K-selected populations tend to reproduce quickly. 3. Exponential growth is rare because resources are usually limiting. 4. r-selected species tend to have type III survivorship curves. 5. Drought and floods are considered to be density-dependent factors potentially affecting population size.
Water has an important stabilizing effect on temperature in living organisms and their environments because as water absorbs heat, much of the energy is used to ____ instead of raising the temperature
a. create hydrogen bonds b. create covalent bonds c. break surface tension d. break hydrogen bonds e. create hydration layers
The pulmonary circuit moves blood from _____
a. the ventricle, to the lungs, back to the heart, then to the body tissues b. the atrium, to the lungs, and directly to the body tissues c. the ventricle, to the body tissue, then to the lungs d. the atrium, to the body tissue, then to the heart e. the atrium, to the lungs, back to the heart, then to the body tissues
Which of these statements concerning the centromere is NOT true?
A) It anchors proteins to DNA. B) It is temporary. C) It is the attachment site for microtubules. D) It appears to join duplicated DNAs. E) Its position along the chromosome varies.