Plant Growth and Development - Numerical Applications
Q. At what temperature range do most plants grow best?
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A.
0-10°C
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B.
10-20°C
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C.
20-30°C
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D.
30-40°C
Solution
Most plants grow best in the temperature range of 20-30°C.
Correct Answer: C — 20-30°C
Q. How many chromosomes do most diploid plants have?
Solution
Most diploid plants have 20 chromosomes, as they typically have two sets of 10.
Correct Answer: B — 20
Q. How many hours of light do most plants require for optimal photosynthesis per day?
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A.
6 hours
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B.
12 hours
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C.
18 hours
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D.
24 hours
Solution
Most plants require around 12 hours of light for optimal photosynthesis.
Correct Answer: B — 12 hours
Q. How many stages are there in the typical life cycle of a flowering plant?
Solution
The typical life cycle of a flowering plant includes 4 stages: germination, growth, reproduction, and death.
Correct Answer: C — 4
Q. How many types of plant hormones are primarily involved in growth regulation?
Solution
There are 4 primary types of plant hormones involved in growth regulation: auxins, gibberellins, cytokinins, and abscisic acid.
Correct Answer: B — 4
Q. What is the average growth rate of a typical tree in cm per year?
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A.
10 cm
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B.
20 cm
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C.
30 cm
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D.
40 cm
Solution
On average, many tree species grow about 20 cm per year under optimal conditions.
Correct Answer: B — 20 cm
Q. What is the average height of a fully grown bamboo plant?
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A.
5 m
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B.
10 m
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C.
15 m
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D.
20 m
Solution
The average height of a fully grown bamboo plant can reach up to 15 m.
Correct Answer: C — 15 m
Q. What is the average lifespan of a typical herbaceous plant?
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A.
1 year
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B.
2 years
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C.
5 years
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D.
10 years
Solution
The average lifespan of a typical herbaceous plant is about 1 year.
Correct Answer: A — 1 year
Q. What is the average number of seeds produced by a single sunflower head?
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A.
100
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B.
500
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C.
1000
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D.
2000
Solution
A single sunflower head can produce around 1000 seeds on average.
Correct Answer: C — 1000
Q. What is the typical percentage of water content in a healthy plant?
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A.
50%
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B.
70%
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C.
90%
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D.
100%
Solution
Healthy plants typically contain about 70% water by weight.
Correct Answer: B — 70%
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