Which of the following has a single strand of DNA shaped like a loop?
a. Plasmids
b. Prokaryotes
c. Eukaryotes
d. Gametes
b. Prokaryotes
Prokaryotes have a single strand of DNA shaped like a loop.
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A phospholipid has ______ fatty acids attached to glycerol, whereas a fat has _______.
A. 3; 4 B. 3; 2 C. 2; 3 D. 2; 4 E. 4; 2
Where in a plant cell is chlorophyll found?
a. on the outer chloroplast membrane b. inside the mitochondria c. in the stroma d. in the thylakoid membrane e. in the plant cell wall
A young couple already has three children and is expecting a fourth. Through a genetic test, the couple finds out that each of them is a carrier for cystic fibrosis. Upon counseling, they are informed that there is a 1 in 4 chance of their unborn child having cystic fibrosis and a 1 in 2 chance that he/she will be a carrier. Describe how the genetic counselor was able to determine these
probabilities. The husband deduces that the child will be born with cystic fibrosis because the other 3 children do not have it. Explain why this reasoning is faulty. How would you handle the situation? What will be an ideal response?
Which plants are widely planted in cities because of their resistance to insect predators, air pollution, and disease?
a. horsetails b. ginkgoes c. pines d. spruces
e. junipers