1- Fundamentally, \"Alternation of Generations\" states that it is NOT possible

Question

1- Fundamentally, "Alternation of Generations" states that it is NOT possible for haploid organisms to be anything other than gametes

True , False

2- Which of the following are modern representatives of plants that first conquered land?

Rhodophyta

3- Evolution of vascular tissues is important for land plants. This is part because...

none of the above coincided with the evolution of vasculature

4- Spores are a result of mitotic division of sporocytes.

False

5- Mosses transport water and solutes in their vascular tissues.

False

6- Non-vascular plants produce lignin to support taller structures.

False

7- The egg of a moss is produced within a cavity called a...

sporangium

8- One of the significant adaptations to prevent drying out in the land environment was the development by vascular plants of (a)

both cuticle and stomata are correct

9- A moss protonema...

produces spores

10- The cohesion of water molecules and their adhesion to the walls of narrow tubes that results in water rising in the tubes is called...

Explanation / Answer

Question 1:

Alternation of generation:

In which plants and algae have sexual haploid and asexual diploid generations. A spore which has n chromosomes grows haploid gametophyte and produce haploid gametes when mature by mitosis. When 2 gametes fuse it forms 2n diploid sporophyte, a mature sporophyte produces spores by meiosis.

Answer: true – fundamentally, “ Alternation of generation” states that it is not possible for haploid organism to be anything other than gametes.

Question: 2

Which of the following are modern representatives of plants that first conquered land?

Bryophytes: these are non vascular plants; they lack vascular system to transport the water and food materials towards up and down the plant.

Charophyta: fresh water algae

Chlorophyta: green algae, free floating or present on rocks and shores.

Rodhophyta: red algae, mostly marine some are fresh water.

Answer: Bryophytes

Question: 3

Evolution of vascular tissues is important for land plants. This is because

Answer: Vascular plant rhizoids are connected to vascular tissues.

Rhizoids are present in the epidermal cells of bryophytes and algae. Their structure is similar to the structure of root hairs of vascular land plants.

Question: 4

Spores are the result of mitotic division of sporophyte.

Answer: False

Spores are formed due to meiosis.

Question: 5

Mosses tansport water and solutes in their vascular tissues.

Answer: False

Mosses are example of bryophytes and it lacks vascular tissues.

Question: 6

Non- vascular plants produce lignin to support taller structures.

Answer: false

Non vascular plants are usually small. They do not have any lignin support.

Question: 7

The egg of moss is produced within a cavity called a

Answer: venter

Question: 8

One of the significant adaptations to prevent drying out in the land environment was the development by vascular plants of a

Answer: cuticle

Cuticle is the layer with wax – cutin which covers the surface of the plant to prevent water loss.

Question: 9

A moss protonema is

Spore of moss develop into protonema. It is thread like filament, which grows on rock, tree, damp soil, etc.

Answer: has the n number of chromosome in each cell.

Spore is formed due to meiosis.

Question: 10

The cohesion of water molecules and their adhesion to the walls of narrow tubes that results in water rising in the tubes is called

Answer: Capillary

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