Biology · Question 1261
Which contractile proteins are found in myofibrils?
- Collagen
- Hemoglobin
- Actin & Myosin
- Keratin
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Correct answer: C
Actin & Myosin
Myofibrils contain thin actin and thick myosin filaments.
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Biology · Question 1262
Directional plant growth towards a chemical nutrient is called what?
- Phototropism
- Hydrotropism
- Chemotropism
- Geotropism
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Correct answer: C
Chemotropism
Directional growth in response to a chemical stimulus is chemotropism.
Biology · Question 1263
Directional plant growth in response to touch is called what?
- Phototropism
- Thigmotropism
- Hydrotropism
- Geotropism
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Correct answer: B
Thigmotropism
Directional growth in response to touch is thigmotropism.
Biology · Question 1264
Directional plant growth in response to gravity is called what?
- Hydrotropism
- Thigmotropism
- Geotropism
- Phototropism
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Correct answer: C
Geotropism
Directional growth in response to gravity is geotropism (gravitropism).
Biology · Question 1265
In traditional introductory botany, bryophytes are considered to have evolved from which group?
- Ferns
- Algae
- Gymnosperms
- Pteridophytes
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Correct answer: B
Algae
In traditional introductory classification, bryophytes are considered to have evolved from green algal ancestors.