Gymnosperm

Q. In some strains of Aspergillus, male and female gametes produced by the same thallus fuse together to form a zygote. These strains are said to be

Q. Choose the characteristic feature of gymnosperms.

1. Winged seeds
2. Multinucleated male gametes
3. Multiciliated female gametes
4. Naked seeds

Q.

How do gymnosperms conserve water?

Q. Cycas has _____________ in its coralloid roots.

1. brown algae
2. fungi
3. blue green algae
4. green algae

Q. Select the mismatch:

1. Cycas - Dioecious
2. Salvinia - Heterosporous
3. Equisetum - Homosporous
4. Pinus - Dioecious

Q. Conifers are adapted to tolerate extreme environmental conditions because of

1. presence of vessels
2. broad hardy leaves
3. superficial stomata
4. thick cuticle

Q. In which of the following groups, the majority of plant orders contain the vascular tissue wherein the vessels and companion cells are absent in the xylem and phloem?

1. Angiosperms
2. Thallophytes
3. Bryophytes
4. Gymnosperms

Q.

Water is not required for fertilization in

1. pteridophytes

2. bryophytes

3. algae

4. gymnosperms

Q.

Which of the following gymnosperms is considered as a living fossil?

1. Pinus

2. Ginkgo biloba

3. Thuja

4. Deodar

Q.

Water is not required for fertilisation in ________.

1. pteridophytes

2. bryophytes

3. algae

4. gymnosperms

Q. Select the incorrect statement with regard to Cycas and Pinus.

1. In Cycas, the stem is unbranched and in Pinus, it is branched
2. In Cycas, the leaves are simple and in Pinus, the leaves are compound
3. Cycas is dioecious and Pinus is monoecious
4. Roots of Cycas have association with cyanobacteria and roots of Pinus have association with fungi

Q. Dwarf shoots of Pinus are

1. Never shed
2. Shed every year
3. Shed every five year
4. Shed after 3 to 15 years

Q. The giant tree among the Pines belongs to

1. Cedrus
2. Pinus
3. Dalbergia
4. Sequoia