An immediate source of energy for exercising muscle cells is _____
a. creatine phosphate
b. aerobic respiration
c. anaerobic respiration
d. fermentation
e. glycolysis
ANSWER: a
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Dr. Edward Jenner realized that cows have a disease called cowpox, which is like a disease that infects humans called smallpox; Jenner noticed that milkmaids whose hands were infected with cowpox were not contracting smallpox. Jenner infected a child with the pus from a cowpox blister, and found that the child did not contract smallpox. Which statement represents a supporting hypothesis?
A. The cowpox virus prevented the small pox virus from entering the child's immune system. B. the smallpox virus was so similar to the cowpox virus that the child's immune system ignored the smallpox virus C. The cowpox infection will prevent the child from being infected by the small pox virus. D. The cowpox infection will have no effect on the child's immunity to the small pox virus.
If a plant cell is stripped of its cell wall it forms a protoplast. A protoplast would _____
A. be connected to adjacent protoplasts by a middle lamella. B. be surrounded by cellulose. C. be less rigid than a plant cell. D. be stronger than a plant cell.
Answer the following statements true (T) or false (F)
1.Monogamous animals live with their one mate and help take care of their young. 2.Response to a predator is a type of innate behavior. 3.Behavior displayed in animal reproduction is a type of innate behavior. 4.Imprinting is a type of innate behavior. 5.A chimp using a stick to probe for termites from a nest is evidence of cognition.
In order for translation to occur:
a. the DNA must produce large numbers of free amino acids. b. replication must be occurring simultaneously. c. transcription must be occurring simultaneously. d. there must be large numbers of free amino acids present in the cytoplasm. e. the nuclear membrane must first dissolve.