Solved

The Following Diagram Depicts the Life Cycle of a Cherry

Question 78

Matching

The following diagram depicts the life cycle of a cherry, a eudicot. Match the specified labels in the diagram with the corresponding life cycle stage.

Premises:

Responses:

Which stage is indicated by label 9?

pollen grain lands on a receptive stigma and germinates

mitosis of a microspore followed by differentiation results in a two-celled pollen grain

four haploid ( n )microspores form by meiosis and cytoplasmic division of a cell in the pollen sac

uneven cytoplasmic divisions produce a seven-celled female gametophyte

an ovule forms in the ovary; a cell in the ovule enlarges

the pollen tube reaches the ovule, penetrates it, and releases two sperm cells; double fertilization occurs

four haploid ( n )megaspores form by meiosis and cytoplasmic division of the enlarged cell in the ovule

pollen grains are released from the anther when the pollen sacs split open

three megaspores disintegrate; in the remaining megaspore, three rounds of mitosis
with no cytoplasmic division result in a single cell with eight haploid nuclei

pollen sacs form in an anther

Premises:

Which stage is indicated by label 9?

Responses:

pollen grain lands on a receptive stigma and germinates

mitosis of a microspore followed by differentiation results in a two-celled pollen grain

four haploid ( n )microspores form by meiosis and cytoplasmic division of a cell in the pollen sac

uneven cytoplasmic divisions produce a seven-celled female gametophyte

an ovule forms in the ovary; a cell in the ovule enlarges

the pollen tube reaches the ovule, penetrates it, and releases two sperm cells; double fertilization occurs

four haploid ( n )megaspores form by meiosis and cytoplasmic division of the enlarged cell in the ovule

pollen grains are released from the anther when the pollen sacs split open

three megaspores disintegrate; in the remaining megaspore, three rounds of mitosis
with no cytoplasmic division result in a single cell with eight haploid nuclei

pollen sacs form in an anther

Correct Answer:

Premises:

Responses:

pollen grain lands on a receptive stigma and germinates

mitosis of a microspore followed by differentiation results in a two-celled pollen grain

four haploid ( n )microspores form by meiosis and cytoplasmic division of a cell in the pollen sac

uneven cytoplasmic divisions produce a seven-celled female gametophyte

an ovule forms in the ovary; a cell in the ovule enlarges

the pollen tube reaches the ovule, penetrates it, and releases two sperm cells; double fertilization occurs

four haploid ( n )megaspores form by meiosis and cytoplasmic division of the enlarged cell in the ovule

pollen grains are released from the anther when the pollen sacs split open

three megaspores disintegrate; in the remaining megaspore, three rounds of mitosis
with no cytoplasmic division result in a single cell with eight haploid nuclei

pollen sacs form in an anther