Procollagen chains are synthesized on the endoplasmic reticulum.
a. true
b. false
Ans: a. true
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Assuming there are still 100 individuals in the Florida panther population, about how much genetic diversity do you expect to be lost by genetic drift in 10 generations?
A. A little more than 10% B. A little more than 5% C. A little more than 1% D. A little more than 50% E. A little more than 15%
Small quantities of hormone can result in profound responses in target tissues. This type of response is referred to as
a. amplification b. a first messenger response c. a gene activation response d. a neural response e. a growth factor response
The __________ produce(s) __________, which influences biological rhythms and the onset of sleep
a. pituitary gland; thyroid stimulating hormone b. pituitary gland; adrenocorticotropic hormone c. pineal gland; melatonin d. adrenal cortex; cortisol e. parathyroid glands; parathyroid hormone
Some scientists predict that the Earth will lose almost all of its topsoil by the middle of the next century. What factors are involved in the erosion of soil?
A. poor farming practices B. deforestation C. desertization D. All of these factors cause erosion.