What is an evolutionary reason why individual ferns may produce millions of spores?
A) Having many spores increases the chances that they will produce fossil fuels.
B) Having many spores increases the chances that they can produce seeds.
C) Spores can germinate only in the right environmental conditions, so producing many spores increases the chances that at least one will end up in an area of those conditions.
D) Spores can disperse only short distances, so producing many spores increases the chances that at least one will travel far enough to germinate.
C
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Visible light has a wavelength range of
A. 400-740 nanometers. B. 200-800 nanometers. C. 200-400 nanometers. D. 200-740 nanometers. E. 0.001-100,000 nanometers.
Animals that match their internal osmotic pressures to those of their external environments are called ____
Fill in the blank with the appropriate word.
What part of a cell membrane is usually in contact with the interstitial fluid?
a. cholesterol b. hydrophobic molecules c. fatty acid tails d. phosphate heads of phospholipids
Symptoms of Toxic Shock Syndrome include all the following, except
A) Nausea, vomiting and diarrhea. B) Sunburn-like rash. C) Appearance of flesh being "eaten" down to the muscle. D) Fever and muscle pain E) Kidney and liver failure