General Biology 2: PLANTS: Reproduction and Development

Subject: Biology 2

Topic: PLANTS: Reproduction and Development

Difficulty: Hard

Questions: 6

Passing Score: 70%

Question #1 1 point

A crop shows "stunted stems" and "abnormally small leaves." If a Zinc deficiency is to blame, what is happening at the molecular level?

A: The plant is unable to produce the amino acid tryptophan, the precursor to growth hormones (auxins).

B: Zinc is needed to keep the leaves from turning into thorns.

C: The plant is losing its ability to absorb water through its stomata.

D: Zinc is the primary pigment used in photosynthesis.

Question #2 1 point

A farmer notices "mottled, chlorotic yellowing" on his leaves. If this is a Manganese deficiency, which process is directly impaired?

A: The maintenance of ionic balance in the cell membrane.

B: Oxidative metabolism and photosynthetic oxygen production

C: The synthesis of thick mucus for the plant's respiratory system.

D: The production of seeds during the first month of growth

Question #3 1 point

Why is "Molybdenum" considered an essential micronutrient for plants that are specifically grown using "Nitrate" fertilizers?

A: It makes the nitrate crystals smaller for the roots to swallow.

B: It is a critical component of the enzyme nitrate reductase, which allows the plant to use nitrate as a nitrogen source.

C: It prevents the nitrate from turning into chlorine in the soil.

D: It is required to help the plant's "lungs" process nitrogen gas.

Question #4 1 point

If a plant is deficient in "Boron," what physical malformations would you expect to see based on your study material?

A: The leaves would turn bright blue and grow very large.

B: Abnormally dark foliage, growth abnormalities, and stunted root tip elongation.

C: The plant would immediately start producing flowers out of its roots.

D: The stems would become hollow and fill with water.

Question #5 1 point

A gardener sees "dark green and twisted" young leaves with "dead spots" (necrotic areas). Why does a deficiency in Copper lead to these specific symptoms?

A: Copper is the mineral that prevents leaves from curling.

B: Copper is a component of enzymes and cytochromes; its absence lowers the rate of protein synthesis.

C: The plant uses copper to reflect harmful sunlight.

D: Copper deficiency causes the plant to produce too much oxygen.

Question #6 3 points

test 33

A: a

B: b

C: c

D: d

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