Biology ยท Science General

Botany and Plant Science

5,038 Questions

Botany and plant science delve into the biological study of plant life, covering structural anatomy, physiological processes, and reproductive mechanisms. Key topics include inflorescence patterns, root modifications, and seed development, which are vital for biology sections in medical entrance exams. This collection of practice questions helps solidify understanding of complex plant functions.

Plant ReproductionPlant AnatomyRoot ModificationsInflorescence PatternsPlant Morphology

Botany and Plant Science Questions

Multiple choice

At the time of pollination, female gametophyte in Pinus is

  1. at megaspore stage, yet to start developing

  2. fully developed without archegonia

  3. mature with archegonia developed

  4. partially developed, undergone free nuclear division
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

At the time of pollination, female gametophyte in Pinus is at megaspore stage and is yet to start its development.

Multiple choice

In which of the following plants, fertilization does not involve siphonogamy and the male gametes are non-flagellate?

  1. Spirogyra

  2. Selaginella

  3. Fern

  4. Pinus

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In vegetative reproduction, fragmentation takes place and Spirogyra simply undergoes the intercalary mitosis to form new filaments. Scalariform conjugation requires association of two different filaments lined side by side either partially or throughout their lengths.

Multiple choice

Female gametophyte in angiosperms differs from that of pinus in

  1. being diploid in contrast to haploid in pinus

  2. not developing from megaspore

  3. having one of the cell diploid in contrast with the other haploid cells of the gametophyte

  4. being partially endosporic
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In angiosperms, one cell is diploid compared to other haploid cell in the female gametophyte.

Multiple choice

Portion of sporogonium in Funaria concerned with assimilation is

  1. seta and capsule

  2. apophysis part of capsule

  3. apophysis and operculum part of the capsule

  4. apophysis and theca part of the capsule
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Apophysis is slightly swollen basal sterile region of the capsule. Its wall consists of epidermis that contains stomata. Beneath it is photosynthetic spongy layer.

Multiple choice

Calyptra in Funaria is

  1. outgrowth from foot of sporogonium

  2. protective structure derived from venter wall

  3. diploid

  4. cluster of leaves surrounding young sporogonium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In bryophytes, the calyptra (plural calyptrae) is an enlarged archegonial venter that protects the capsule containing the embryonic sporophyte. The calyptra is usually lost before the spores are released from the capsule.