Question

question 10
8.5 points
match the tropisms to a plant’s behavior.
prompts
1 thigmotropism
2 heliotropism
3 hydrotropism
4 chemotropism
answers
select match
a vine curls to wind around a branch in the jungle.
the roots of salt cedar grow toward the river bed.
a sunflower follows the sun’s path throughout the day.
plant sperm migrate to the egg by following the sugars abundant in the style.
question 11
8.5 points
shoot of the plant, shows ____ gravitropism.
a positive
b negative
c neutral

Explanation:

Question 10

1. Thigmotropism is plant growth in response to touch. A vine curling around a branch (touch stimulus) matches this.
2. Heliotropism is plant movement in response to sunlight. A sunflower following the sun’s path matches this.
3. Hydrotropism is plant growth toward water. Salt cedar roots growing toward the river bed (water source) matches this.
4. Chemotropism is plant growth in response to chemical stimuli. Plant sperm following sugars (chemical) in the style matches this.

Gravitropism: Positive gravitropism is growth toward gravity (roots), negative is growth against gravity (shoots). Plant shoots grow upward (against gravity), so they show negative gravitropism.

Answer:

1. Thigmotropism - A vine curls to wind around a branch in the jungle.
2. Heliotropism - A sunflower follows the sun’s path throughout the day.
3. Hydrotropism - The roots of salt cedar grow toward the river bed.
4. Chemotropism - Plant sperm migrate to the egg by following the sugars abundant in the style.

Question 11