Modern humans evolved about
a. 200,000 years ago.
b. 2,000,000 years ago.
c. 2,000,000,000 years ago.
d. 4,600,000,000 years ago.
d
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Describe the difference in temperature range between small bodies of water and open ocean areas. What adaptations do you expect to see in the animals living in either body of water?
What will be an ideal response?
Homeotic genes
a. cause lethal mutations. b. regulate development of specific body parts. c. are found only in fruit flies, where they are responsible for odd placement of appendages. d. produce "fate maps." e. form as blocks of genes in cells randomly distributed throughout the body
Substances that plug up an enzyme's active site are ________
A) enzyme substrates B) enzyme inhibitors C) enzyme catalysts D) enzyme products
If a water molecule passes through the outer membrane of a chloroplast, how many more membranes will it have to move through to be in the stroma?
A. one B. three C. two D. four