Which of the following sex and generation combinations most directly produces the integument of a pine seed?
A) male gametophyte
B) female gametophyte
C) male sporophyte
D) female sporophyte
D
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Which one of the following statements describes the relationship between -galactosidase and -thiogalactoside?
A. They are synonyms for the same molecule. B. -galactosidase cleaves -thiogalactoside. C. -galactosidase is a precursor for synthesizing -thiogalactoside. D. -thiogalactoside is a precursor for synthesizing -galactosidase. E. -galactosidase binds to -thiogalactoside but is unable to cleave it.
Venus flytraps live in low pH soils that have poor nutrition. They have adapted specialized leaves and nectars to attract and trap their food of choice. Which of the following describes Venus flytraps?
a. saprophyte b. epiphyte c. insectivore d. parasite
Most atmospheric oxygen comes from photosynthesis. From which of the following molecules is the oxygen derived?
A. carbon dioxide B. chlorophyll b C. chlorophyll a D. glucose E. water
A biologist is studying the population dynamics of pocket gophers in a meadow in central Oregon. She noted that, when population numbers are high, death rates from disease and starvation increase. This is an example of:
A) r-selected growth. B) the principle of intrinsic rate of growth. C) density dependent control. D) exponential growth.