What type of evidence shows that endocrine disruptors in the water supply can cause human reproductive problems?
A) correlative
B) definitive
C) statistically significant
D) entirely absent
A
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Answer the following statements true (T) or false (F)
1. The diversity-stability hypothesis supports the idea that pest outbreaks are less likely on cultivated land. 2. MacArthur and Wilson's island biogeography would predict that there would be more species in North America than in Greenland. 3. The productivity hypothesis would predict that there would be more species in North America than in the Amazon. 4. A metagenomic library is a typical tool of analyzing the flowering plants in a forest community.
Production efficiency is _______ in ectotherms than in endotherms.
A. higher B. lower C. the same D. more often zero E. fine
Why is fertilization in flowering plants called double fertilization?
a. it takes two pollen grains to fertilize a single ovule b. two ovules must be fertilized to form a single seed c. two cells in the ovule are fertilized, the egg and the endosperm mother cell d. one pollen grain fertilizes two ovules e. it takes the efforts of two flowers (male and female) to produce seeds
The conversion of PGAL to pyruvate is
accompanied by a. anaerobic respiration. b. photophosphorylation. c. the electron transfer chain. d. substrate-level phosphorylation. e. the Krebs cycle.