Plant Kingdom - Online Test
Q1. Cycas is a gymnosperm as it has
Answer : Option C
Explaination / Solution:
The gymnosperms (gymnos : naked, sperma : seeds) are plants in which the ovules are not enclosed by any ovary wall and remain exposed, both before and after fertilisation. The seeds that develop post-fertilisation, are not covered, i.e., are naked. Since, Cycas has naked seeds, it belongs to gymnosperms.
Q2. In which pteridophytes, hetersporous is produced?
Answer : Option A
Explaination / Solution:
Genera like Selaginella and Salvinia which produce two kinds of spores, macro (large) and micro (small) spores are known as heterosporous.
Q3. Choose the odd one out among the following: Dryopteris, Pteris, Adiantum, Selaginella.
Answer : Option C
Explaination / Solution:
Selaginella belong to class Lycopsida and other plants (Dryopteris, Pteris, Adiantum) belong to class Pteropsida of Pteridophytes.
Q4. The giant redwood tree is
Answer : Option D
Explaination / Solution:
One of the gymnosperms, Giant sequoias are the world's largest single tree with an average height of 50–85 m (164–279 ft) and 6–8 m (20–26 ft) in diamete
Q5. Which among the following belong to Sphenopsida?
Answer : Option A
Explaination / Solution:
Equisetum of Pteridophyta belong to class Sphenopsida.
Q6.
Identify the plant shown in the figure given below.
Answer : Option D
Explaination / Solution:
The plant shown above is cycas. This plant belongs to division Cycadophyta and family Cycadaceae. It is dioecious and Cycas circinalis species is endemic to India.
Q7. Male and female gametophytes do not have free independent existence in
Answer : Option A
Explaination / Solution:
Unlike bryophytes and pteridophytes , in gymnosperms ( Cedrus )the male and the female gametophytes do not have an independent free-living existence.
Q8. The structure formed by germinated fern spore is
Answer : Option A
Explaination / Solution:
Fern spores germinate to give rise to inconspicuous, small but multicellular, free-living, mostly photosynthetic thalloid gametophytes called prothallus.The gametophytes bear male and female sex organs called antheridia and archegonia.
Q9. The megasporangium of naked seed plants are called
Answer : Option B
Explaination / Solution:
The cones bearing megasporophylls with ovules or megasporangia are called macrosporangiate or female strobili.
Q10. The cone of Gymnosperms represent the
Answer : Option C
Explaination / Solution:
In gymnosperms, male and female cones are formed that produce male and female gametes.The strobili bearing microsporophylls and microsporangia are called microsporangiate or male strobili. The cones bearing megasporophylls with ovules or megasporangia are called macrosporangiate or female strobili. So, cone of gymnosperms represents the reproductive organs.
