Availability of water, space and food are all examples of ________ factors that influence the fitness of individuals.
Fill in the blank(s) with the appropriate word(s).
Limiting
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Which branch of biology examines the form and variety of organisms in their natural environment?
a. taxonomy b. natural history c. comparative morphology d. biogeography
e. geologyTransport of photosynthetically produced sugars from leaves to roots occurs by _____
a. pressure flow b. differences in source and sink solute concentrations c. the pumping force of xylem vessels d. transpiration, tension, and cohesion of water e. pressure flow and differences in source and sink solute concentrations
If nondisjunction occurs during meiosis,
a. the resulting sex cells will be heterogametes. b. one-half of the resulting cells will exhibit trisomy and the other half monosomy. c. diploid cells will be produced. d. all gametes would lack a chromosome and these gametes would be infertile. e. none of the gametes will be capable of achieving fertilization.
In the life cycle of a pine tree, meiosis in the megasporocyte produces _________.
A. Two haploid microspores and two haploid megaspores B. Four haploid microspores C. Four haploid megaspores D. Two diploid megaspores E. Two diploid microspores