15283.Isogamous condition with non-flagellated gametes is found in
Chlamydomonas
Spirogyra
Volvox
Fucus
15284.Two adjacent filaments of Spirogyra affinis each 10 cells participating in reproduction. How many new Spirogyra plants are produced during sexual reproduction?
5
10
20
40
15285.Which one pair of examples will correctly represent the grouping Spermatophyta according to one of the schemes of classifying plants:
Acacia, Sugarcane
Pinus, Cycas
Rhizopus, Triticum
Ginkgo, Pisum
15286.Which one of the following pairs is wrongly matched while the remaining three are correct?
Bryophyllum – Leaf buds
Agave – Bulbils
Penicillium – Conidia
Water hyacinth – Runner
15287.Nostoc fixes dinitrogen in symbiotic association with the following :
I. Alnus
II. Gunnera
III. Anthoceros
IV. Casuarina
The correct combination is :
I. Alnus
II. Gunnera
III. Anthoceros
IV. Casuarina
The correct combination is :
I and II
II and III
I and III
I and IV
15289.Which of the following taxa shows zooidogamous oogamy?
(I) Spirogyra
(II) Funaria
(III) Pteris
(IV) Cycas
The correct answer is :
(I) Spirogyra
(II) Funaria
(III) Pteris
(IV) Cycas
The correct answer is :
I, II, III
I, III, IV
I, II, IV
II, III, IV
15290.Match items in Column I with those in Column II
| Column I | Column II |
|---|---|
| (A) Peritrichous flagellation | (J) Ginkgo |
| (B) Living fossil | (K) Macrocystes |
| (C) Rhizophore | (L) Escherichia coli |
| (D) Smallest flowering plant | (M) Selaginella |
| (E) Largest Perennial alga | (N) Wolffia |
A – L, B – J, C – M, D – N, E – K
A – K, B – J, C – L, D – M, E – N
A – J, B – K, C – N, D – L, E – K
A – N, B – L, C – K, D – N, E – J
15291.Select the wrong statement:
Isogametes are similar in structure, function and behaviour
Anisogametes differ either in structure, function or behaviour
In oomycetes female gamete is smaller and motile, while male gamete is larger and nonmotile
Chlamydomonas exhibits both isogamy and anisogamy and fucus shows oogamy
15292.Read the following statements (A-E) and answer the question which follows them
(A) In liverworts, mosses, and ferns gametophytes are free-living
(B) Gymnosperms and some ferns are heterosporous
(C) Sexual reproduction in Fucus, Volvox and Albugo is oogamous
(D) The sporophyte in liverworts is more elaborate than that in mosses
(E) Both, Pinus and Marchantia are dioecious
How many of the above statements are correct?
(A) In liverworts, mosses, and ferns gametophytes are free-living
(B) Gymnosperms and some ferns are heterosporous
(C) Sexual reproduction in Fucus, Volvox and Albugo is oogamous
(D) The sporophyte in liverworts is more elaborate than that in mosses
(E) Both, Pinus and Marchantia are dioecious
How many of the above statements are correct?
One
Two
Three
Four