Polar, water-soluble hormones usually affect cells by binding to intracellular receptors.
a. true
b. false
Answer: b. false
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Which of the following statements is not true of the seed plants?
A. Gametes are dispersed via wind or animals. B. They produce pollen. C. The sporophyte is dominant. D. They all produce ovules, which develop into seeds. E. They all produce fruit, which aids in dispersal.
A cellular molecular pathway by which an external signal is converted into a functional response is
called ________________. Fill in the blank(s) with the appropriate word(s).
Which of the following monomers is not paired correctly?
A) glucose-carbohydrates B) amino acids-proteins C) nucleotides-nucleic acids D) All of these are paired properly.
Why have populations of many ray-finned fish species decreased in recent years?
A) Pollution of their environment B) Loss of their prey species C) Overfishing by humans D) Parasitism by lampreys E) Bacterial disease