Classification of Gymnosperms

Q. In Cycas, small specialised roots are associated with nitrogen - fixing cyanobacteria. This specialised roots are called

1. mycorrhiza roots
2. coralloid roots
3. compound roots
4. rhizobium roots

Q. Which option is true about heart wood/duramen?
(i) It does not help in water and mineral conduction.
(ii) It is dark colored but soft.
(iii) It has tracheary elements filled with tannins, resins, gums, oil, etc.
(iv) It is a peripheral part.
(v) Sensitive to microbes and insects, hence least durable.

1. (ii) and (iii)
2. (i) and (iii)
3. (iv) and (v)
4. (iii) and (iv)

Q. Match the column I with column II and choose the option which shows its correct combination.
$\begin{array}{cccc}& \text{Column-I}& & \text{Column-II}\\ & \text{(Pattern of life cycle in plant)}& & \text{(Examples)}\\ \text{A.}& \text{Haplontic life cycle}& \text{I.}& \text{Bryophytes, Pteridophytes, Ectocarpus, Polysiphonia, Kelp}\\ \text{B.}& \text{Diplontic life cycle}& \text{II.}& \text{Seed bearing plants (Gymnosperm and Angiosperm), Fucus}\\ \text{C.}& \text{Haplo-diplontic life cycle}& \text{III.}& \text{Many algae (Volvox, Spirogyra) and some species of Chlamydomonas}\end{array}$

1. A – III; B – II; C – I
2. A – I; B – II; C – III
3. A – II; B – I; C – III
4. A – III; B – I; C – II

Q. Endosperm in Pinus is:

1. Post-fertilization tissue
2. Pre or post-fertilization tissue
3. none of these
4. Pre-fertilization tissue

Q. In female gametophyte of Cycas, number of archegonia present is:

1. More than ten
2. Two to eight
3. One
4. none of these

Q.

What are the 4 types of gymnosperms?

Q. Ciliated male gametes are found in:

1. Cycas
2. Both (a) and (b)
3. Pinus
4. Ginkgo

Q.

Is a ginkgo tree an angiosperm?

Q. Pinus wood is:

1. Porous
2. Non-porous
3. Slightly porous
4. none of these

Q. The coralloid roots in Cycas are

1. Phototrophic
2. Aerial
3. Apogeotropic
4. Positively geotropic

Q. Which among the following shows a symbiotic association in its roots?

1. Cycas
2. Pinus
3. Pisum sativum
4. All of the above

Q. Assertion :In pteridophytes, zygote produces a multicellular sporophyte. Reason: Sporophyte is the dominant phase in life cycle of pteridophytes.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Which is the largest order of modern gymnosperms?

1. Gnetales
2. Cycadales
3. Coniferales
4. Ginkgoales

Q.

What Percentage Of Plants Are Gymnosperms?

Q. Mycorrhiza is helpful in

1. Increase the fertility of soil
   
2. Synthesis of food
   
3. Providing resistance against different regulators
   
4. Getting nutrients from soil
   

Q. Leafy, erect gametophore is produced from buds in Funaria on:

1. Chloronema
2. Both (a) and (b)
3. Caulonema
4. None of these

Q. The seeds are scattered far from the parent plant in

1. Castor
2. Balsam
3. Cotton
4. All of the above

Q. Coralloid roots of Cycas possess a symbiotic Algae. It is

1. Aulosira
2. Spirogyra
3. Ulothrix
4. Anabaena

Q. In Cycas, small specialised roots called coralloid roots are associated with

1. nitrogen fixing mycorrhiza
2. nitrogen fixing cyanobacteria
3. carbondioxide fixing cyanobacteria
4. carbondioxide fixing mycorrhiza

Q. The leaf like photosynthetic organ in brown algae is called

1. stipe
2. holdfast
3. frond
4. pyrenoid

Q. Write about the economic importance of gymnosperms.

Q. Assertion :Some fruits are furnished with hooks, spines, barbs, or other devices for sticking to the body of animals. Reason: Such fruits are dispersed by animals

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false

Q. what is the function of fruit apart from storage of materials?

Q. A plant in which food stored in the form of Laminarin-

1. $Volvox$
2. $Chara$
3. $Ectocarpus$
4. $Marchantia$

Q. In female gametophyte of Cycas, number of archegonia present is:

1. More than ten
2. Two to eight
3. One
4. None of these

Q. Select the incorrect match with respect to the plant and the relative plant part modified for food storage.

1. Lathyrus odoratus (sweet potato) - Root
2. Solanum tuberosum (potato) - Stem
3. Allium cepa (onion) - Leaves
4. Dahlia (Dahlia) - Leaves

Q. Match the Gymnosperms to their classes.

1. Cycadophyta
2. Ephedra
3. Coniferopsida
4. Gnetophyta
5. Zamia pigmae
6. Ginkgo biloba
7. Pine
8. Ginkgophya

Q. Cycas has the largest

1. Ovule
2. Egg
3. Sperm
4. All of the above

Q. Which of the following genera is associated with coralloid roots?

1. Cycas
2. Taxus
3. Pinus
4. Sequoia

Q. The .......... are root - like structures which help in anchorage and absorption of water in the bryophytes.