1.When stems or leaves adjust the rate and direction of growth in response to li

Question

1.When stems or leaves adjust the rate and direction of growth in response to light, they show ( ). (Fill in the parentheses with the most appropriate choice from the list provided.)

A. giberrelin

B. auxin

C. magnetism

D. gravitropism

E. phototropism

2.( ) have flower parts in multiples of four or five and ( ) have leaf veins that run parallel with one another. (Fill in the parentheses with the most appropriate choice from the list provided.)

A. monocots; eudicots

B. eudicots; monocots

C. angiosperms; gymnosperms

D. seedless vascular; gymnosperms

E. none of the above fit

3.The ( ) is the lower swelling of the carpel and contains the ( ).(Fill in the parentheses with the most appropriate choice from the list provided. See figure 23.5 of the book).

A. sepals; petals

B. stem; ovule

C. ovary; ovule

D. stigma; ovary

E. stigma; style

4.___________ occurs when pollen lands on the stigma; _______ occurs when the sperm unites with an egg. (Fill in the blanks with the most appropriate choices from the list provided.)

A. fertilization; pollination

B. germination; pollination

C. gravitropism; phototropism

D. pollination; fertilization

E. germination; fertilization

5.What is a region of actively dividing undifferentiated plant cells?

A. meristem

B. xylem

C. phloem

D. leaves

E. roots

Explanation / Answer

1. E. phototropism

Phototropism is the growth of plants towards/in the direction of source of Sun light. When stems or leaves adjust the rate and direction of growth in response to light, they show phototropism.

2. B. eudicots; monocots

Eudicots have flower parts in multiples of four or five and monocots have leaf veins that run parallel with one another.

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