The point of constriction on chromosomes that contains certain repeated DNA sequences that bind specific proteins is called
A. the centromere
B. the kinetochore
C. the cohesin complex
D. the centrosome
E. the centriole
Answer: A
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Which of the following is true regarding the amniotic egg of snakes, turtles, etc.?
A. Fertilization must take place after the egg has formed. B. The egg is impermeable to gases such as oxygen or carbon dioxide. C. The egg is vulnerable to desiccation (water loss). D. The embryo's nutritional needs are met by a large yolk or placenta.
Two species of closely related squirrels both feed on acorns produced by oak trees. One species feeds exclusively near
the top of the tree and the other feeds exclusively towards the bottom of the tree. This is an example of ____.
a. competitive exclusionb. resource partitioning c. mutualism d. commensalism e. mimicry
Bacterial plasmids often have genes that code for genetic exchange or antibiotic resistance
____________________ Indicate whether the statement is true or false.
How might anthropogenic enhancement of the greenhouse effect result in increased primary production?
A) Warmer temperatures would lengthen the growing season and speed metabolism. B) Enhanced CO2 concentrations would increase the rate of photosynthesis. C) both of the above