The word gymnosperm means ____
a. covered seed
b. active sperm
c. naked egg
d. naked seed
e. covered sperm
D
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Which of the following statements about K-strategists is false?
A. They reproduce quickly. B. They produce few offspring. C. There is a lot of parental investment in the offspring. D. They evolve in stable environments. E. They evolve in environments with intense competition for limited food.
Tetanus is a bacterial infection that is commonly acquired from puncture wounds. Why do you need to be vaccinated against the flu every year, but you only need a virus booster against tetanus every 10 years?
A. Antibody production against viruses drops off about 10 times faster than antibody production against bacterial infections, so you need to be vaccinated 10 times more frequently against the flu. B. The flu is everywhere but bacterial infections are incredibly rare, so you don't need to be as careful in maintaining your immunity against them. C. There is a higher rate of mutation in viruses than in bacteria, so you need to change the antibodies you are producing (through vaccination) every year for the flu. D. Infections that enter the body through the bloodstream (like tetanus) are much less toxic than infections that enter the body through binding to epithelial cells (like the flu).
A deficiency in a plant micronutrient
A. is less serious than a deficiency in a macronutrient. B. makes that plant susceptible to herbivores. C. can have a severe effect on plant growth. D. results in no visible symptoms. E. has no impact on the agriculture of a region.
True or false: Sterile saline has sterilizing effects on the skin.
What will be an ideal response?