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Escherichia cell is plated on nutrient agar plates that each contain a different type of antibiotic. The shaded area represents growth of the bacteria. Which of the following plates contains bacteria that were most resistant to the antibiotic

A. A

B. B

C. C

D. D

Answer Explanation:

This is the plate with the most growth despite the presence of antibiotic cover.

Therefore, the Correct Answer is C.

Q #1: Which of the following distinguishes endocrine and exocrine glands from another?

A. The presence or absence of ducts

B. The effect their secretions have on the target cells

C. The biochemistry of their secretions

D. The presence or absence of nerve innervation

Answer Explanation

Exocrine glands secrete their products into ducts that carry them to the target organs. In contrast, endocrine glands secrete their products directly into the bloodstream, which carries them to target cells throughout the body.
Q #2: in pea plants, green pod color (6) is dominant to yellow pod color ( A cross was done between a plant with green pods and a plant with yellow pods. Of the resulting offspring 50% had green pods and 50% had yellow pods. Which of the following were the genotypes of both parent plants?

A. Ggx Gg

B. GG x gg

C. Gg x gg

D. gg x gg

Answer Explanation

G

g

g

Gg

gg

g

Gg

gg
Q #3: Which of the following hormones regulates blood calcium levels?

A. Parathyroid hormone

B. Growth hormone

C. Norepinephrine

D. Melatonin

Answer Explanation

The parathyroid hormone (PTH) from the parathyroid glands is important in serum calcium regulation. It increases blood calcium levels by stimulating osteoclasts to break down bone and release calcium into the bloodstream. PTH also enhances the absorption of calcium from the intestines and the kidneys.

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