Plant Kingdom Test 11

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Plant Kingdom Test 11

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Question 1
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Selaginella, Salvinia and Marsilea show heterospory.
Reason : They produce two kinds of sporesmicrospores and macrospores.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Heterospory is the production of two kinds of spores and is the first step towards seed habit. Pteridophytes such as Selaginella, Salvinia and Marsilea produce two kinds of spores- microspores and macrospores.
Question 2
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Bryophytes are successful land plants.
Reason : They grow successfully on wet and marshy land as it require water for completion of their life cycle.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Bryophytes are amphibians of plant kingdom. They grow on moist habitats and require water for reproduction.
Question 3
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : The gymnosperms are heterosporous.
Reason : They produce diploid microspores within sporangia.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Gymnosperms produce haploid microspore within microsporangia.
Question 4
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Horsetails are represented by a single genus Equisetum
Reason : The leaves of Equisetum bear strobili at the tips of stems that produce spores.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Equisetum is a fern in which the plant body has an underground rhizome that bears aerial green stems. It makes this plant to bear a fanciful resemblance to a horsetail. The leaves bear strobili at the tips of stems that produce spores. On germination spores produce gametophyte.
Question 5
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Chlorella and Spirullina are rich are used as food supplements.
Reason : Both are rich source of carbohydrates.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

The unicellular algae, Chlorella and Spirullina are rich in proteins and hence they are used as food supplements.
Question 6
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Red algae have chemo-autotrophic mode of nutrition.
Reason : The pigment responsible for red colour of red algae is r-phycoerythrin.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Rhodophyceae (Red algae) are photo-autotrophic in their mode of nutrition. They synthesize food in presence of chlorophyll ‘a’ in their chromatophores or chloroplasts. They contain a red pigment, r- phycoerythrin in their body and hence they appear red.
Question 7
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Red algae contribute in producing coral reefs.
Reason : Some red algae secrete and deposit calcium carbonate over their walls.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Red algae contribute in producing coral reefs as they secrete and deposit calcium carbonate over their walls. As for example red algae coralline algae deposit CaCO₃ in their cell wall coral reef is made of thin layers of CaCO₃.
Question 8
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Coralloid roots are feature of Cycas plant.
Reason : These are specialized roots, which grow on the surface of soil.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Coralloid roots are feature of Cycas plant. They are specialized roots, which grow on the surface of soil because they are apogeotropic.
Question 9
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Some Bryophytes are called liverworts.
Reason : Some Bryophytes are called as liverworts because their sporophyte resembles with liver lobes.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Some bryophytes are called as liverworts because their gametophytic thalli resemble liver lobes.
Question 10
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Phaeophyceae are brown in colour.
Reason : They do not have Chlorophyll b.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Phaeophyceae commonly known as brown algae contains carotenoids and fucoxanthin besides chlorophyll ‘a’ and ‘c’. The fucoxanthin pigments masks the green colour of the chlorophyll.
Question 11
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Volvox exhibits oogamous reproduction
Reason : It involves fertilization of non-motile female gamete or egg by means of a motile gamete or sperm.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Volvox , an alga exhibits oogamous reproduction Oogamous type of reproduction involves fusion between one large, non-motile (static)female gamete and a smaller, motile male gamete.
Question 12
1 / -0

Directions : In the following question, the Assertions (A) and Reason (R) have been put forward. Read both the statements and choose the correct option from the following.
Assertion : Cycas is called as the ‘relic of past’.
Reason : Cycas exhibit phylogenetic relationship with pteridophytes.

A
A. Both A and R are true, and R is the correct explanation of A.

B
B. Both A and R are true, but R is not the correct explanation of A.

C
C. A is true but R is false.

D
D. A is false but R is true.

Solution

Cycas, one of the few living members of gymnosperms is called as the ‘relic of past’. It exhibits phylogenetic relationship with pteridophytes. Its evolutionary characters are: slow growth, shedding of seed when the embryo is still immature, little secondary growth, sporophylls are leaf like, sperms are motile structures, leaf base scars are like the tree ferns, young leaves exhibit circinate venation and arrangement of microsporangia in well-defined archegonia.

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Plant Kingdom Test 11

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Question 1

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 2

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 3

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 4

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 5

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 6

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 7

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 8

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 9

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 10

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 11

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution

Question 12

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, but R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

Solution