Test Preparation on Biology-Classification of plants

Consider the following statements regarding reproduction in class-Chlorophyceae

I. Asexual reproduction is mainly by flagellated zoospores produced in zoosporangia.

II. sexual reproduction shows considerable variation in the type and formation of sex cells and it may be isogamous, anisogamous, and oogamous.

Which of the statements given above are correct?

1Only I
2Only II
3I and II
4None of these

Statement I: Certain marine brown and red algae produce large amounts of hydrocolloid.

Statement II: Algin and carrageenin are used commercially as water-holding substances.

Choose the correct option

1Statement I is true, II is false
2Statement I is false, II is true
3Both statements are true
4Both statements are false

Consider the following statements regarding gymnosperms and choose the correct option

I. In gymnosperms, the male and female gametophytes have an independent existence

II. The multicellular female gametophyte is retained within the megasporangium

III. The gymnosperms are heterosporous. Of these statements

1I and II are true, but III is false
2I and III are true, but II is false
3II and III are false, but I is true
4II and III are true, but I is false

In gymnosperms, the male and female gametophytes are on same plant.

In comparison to angiosperm, which one of the following algae exhibits haplo-diplontic life cycle?

1Volvox
2Chlamydomonas
3Ectocarpus
4Fucus

Brown algal life cycles are often quite complex, sometimes including several variant pathways. The filamentous brown alga Ectocarpus has a haploid-diploid life cycle that involves an alternation between two morphologically similar generations but a number of variations on this basic cycle are possible.


Right Ans	Wrong Ans	Not Attempted

Statement I: Certain marine brown and red algae produce large amounts of hydrocolloid. Statement II: Algin and carrageenin are used commercially as water-holding substances. Choose the correct option

In comparison to angiosperm, which one of the following algae exhibits haplo-diplontic life cycle?

Check your progress:

Statement I: Certain marine brown and red algae produce large amounts of hydrocolloid.

Statement II: Algin and carrageenin are used commercially as water-holding substances.

Choose the correct option