Question 1

In the fern life cycle, how do spores and gametes differ?

Accepted Answer

B

Question 2

If you see moss near the base of a tree in your yard, the green leafy moss plants are

Accepted Answer

Mosses have a life cycle dominated by the gametophyte stage, which is the green, leafy part of the plant.

Question 3

In general, the plant life cycle has evolved from _ _ to .

Accepted Answer

The plant life cycle has evolved from a dominant gametophyte stage in non-vascular plants like mosses to a dominant sporophyte stage in vascular plants like ferns, gymnosperms, and angiosperms.

Question 4

In general, plants have evolved from to .

Accepted Answer

Plants have generally evolved from seedless plants, like ferns and mosses, to seed plants, such as gymnosperms and angiosperms, which offer advantages in reproduction and survival.

Question 5

During a late- summer walk through a park, you notice a tree that has remnants of many flowers but no fruits or seeds developing. There are no other trees like this one in the area. What could explain this occurrence?

Accepted Answer

Male trees produce only pollen and do not develop fruits or seeds, which explains the absence of fruit development on this tree.

Question 6

The sporophyte produces

Accepted Answer

The sporophyte produces spores by meiosis. Meiosis is a type of cell division that reduces the number of chromosomes in a cell by half. This process is necessary for the production of spores, which are haploid cells that can develop into new sporophytes.

Question 7

The sexual life cycle of plants is described as alternation of generations because it alternates between

Accepted Answer

The alternation of generations in plants refers to the cycle between the diploid sporophyte generation, which produces spores, and the haploid gametophyte generation, which produces gametes (sperm and eggs).

Question 8

Ferns and mosses mainly live in environments.

Accepted Answer

Ferns and mosses require moist environments for reproduction and growth, as they rely on water for the movement of sperm to the egg.

Question 9

In the life cycle of a fern, the large fern plant that we normally see is the

Accepted Answer

The large fern plant that we typically see is the sporophyte, which is the diploid phase in the life cycle of a fern.

Question 10

Spores and gametes are both haploid reproductive cells. What is the difference between the two?

Accepted Answer

Spores germinate and grow into a multicellular haploid gametophyte, while gametes fuse to form a diploid zygote.

Question 11

In the alternation of generations, what is formed when a spore germinates?

Accepted Answer

When a spore germinates in the alternation of generations, it forms a haploid stage called the gametophyte, which will eventually produce gametes.

Question 12

A plant, such as an iris, that reproduces asexually most of the time probably

Accepted Answer

A plant that reproduces asexually most of the time produces genetically identical offspring, which are likely to thrive in the same stable environment as the parent.

Question 13

Which of the following has a gametophyte that is an independent plant that dominates the life cycle and does NOT have a sporophyte that is an independent plant?

Accepted Answer

Mosses have a dominant gametophyte stage that is independent, while their sporophyte is dependent on the gametophyte for nutrition.

Question 14

A pollen grain is actually the

Accepted Answer

A pollen grain is the male gametophyte in seed plants, responsible for producing sperm cells for fertilization.

Question 15

results in the production of spores in flowering plants.

Accepted Answer

Meiosis is the process that results in the production of spores in flowering plants, as it reduces the chromosome number by half to form haploid spores.

Question 16

In flowering plants, the sperm does not have to swim to the egg. The sperm reaches the eggs by

Accepted Answer

In flowering plants, the sperm reaches the egg through the growth of a pollen tube, which transports the sperm cells from the pollen grain to the ovule where fertilization occurs.

Question 17

Which of the following is "male" in the life cycle of angiosperms?

Accepted Answer

Pollen grain is the male gametophyte in the life cycle of angiosperms.

Question 18

Angiosperms with wind- dispersed pollen include

Accepted Answer

Grasses have wind-dispersed pollen, which is a lightweight and dry substance that can be easily carried by the wind.

Question 19

Conifers do not have flowers to attract pollinators. Instead, fertilization occurs

Accepted Answer

Conifers rely on wind pollination, where pollen is carried by the wind to fertilize the ovules in the cones.

Question 20

An oak tree is a

Accepted Answer

An oak tree is a sporophyte, which is the diploid, multicellular stage in the life cycle of plants that undergo alternation of generations.

Quiz 45: Plant Reproduction and Development