Reproduction in Algae

Q.

Volvox and Fucus sexually reproduce by

1. Isogamy

2. Anisogamy

3. Oogamy

4. All the above

Q. Which of the following undergoes meiosis in algae?

1. Zoospore
2. Zygote
3. Aplanospore
4. Algae never undergo meiosis as they are haploid

Q. Internal asexual propagule of some fresh water sponges is

1. Planula
2. Amphiblastula
3. Gemmule
4. Stereoblastula

Q. Which of the following statements is true regarding reproduction in phaeophyceae?

1. Vegetative reproduction takes place by fragmentation.
2. Asexual reproduction in most brown algae is by non-flagellated zoospores.
3. Zoospores are pear-shaped and have two unequal laterally attached flagella.
4. Sexual reproduction may be isogamous, anisogamous or oogamous.

Q.

what is the difference between zoospores and zygospores?

Q.

Match the following and choose the correct option -

"$$\begin{array}{cc}ColoumnI& ColoumnII\\ a.Isogamy& 1.\text{Male and female gametes are different}\\ b.Anisogamy& 2.\text{Female gamete is non-motile}\\ c.Oogamy& 3.\text{Gametes are identical}\end{array}$$ "

1. a:2, b:1, c:3

2. a:3, b:2, c:1

3. a:3, b:1, c:2

4. a:1, b:2, c:3

Q. Consider the following four statements and find out which of them are wrong.
(A) The sporophyte in liverworts is more elaborate than that in mosses.
(B) Salvinia is heterosporous.
(C) The life-cycle of all seed-bearing plants is diplontic.
(D) In pinus, male and female cones are borne on different trees.

1. Statements (A) and (C)
2. Statements (A) and (D)
3. Statements (B) and (C)
4. Statements (A) and (B)

Q. Sponges are generally

1. Hermaphrodite
2. Unisexual
3. Sexually sterile
4. Either B or C

Q. Based on the diagram, identify the structure.

1. It is an arecheocyte.
2. It is a gemmule.
3. It is an amoebocyte.
4. It is a spicule.

Q. Reduction bodies are perennating reproductive bodies of

1. Roundworms
2. Flatworms
3. Coelenterates
4. Sponges

Q.

Embryo is not formed in ___.

1. Bryophytes

2. Algae

3. Gymnosperms

4. Pteridophytes

Q. Monoecious plant of Chara shows occurrence of:

1. Antheridiophore and archegoniophore on the same plant
2. Stamen and carpel on the same plant
3. Upper antheridium and lower ogonium on the same plant
4. Upper oogonium and lower antheridium on the same plant

Q. Which of the following is not the character of sponge?

1. Gemma formation
2. External fertilization
3. Internal fertilization
4. None of the above