Tag: plant kingdom

Quizzes (21) Questions (340)

Questions Related to plant kingdom

Multiple choice plant kingdom biology

Which one of the following structures not found in any class of algae?

  1. Rhizoid and apical cell

  2. Apical cell

  3. Embryo

  4. Thalloid plant body
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Algae typically possess thalloid plant bodies and can have rhizoids or apical cells depending on the group, but true embryos are entirely absent in algae and only appear starting from bryophytes onwards.

Multiple choice plant kingdom biology

Choose the correct statement.

  1. Haploid contained of human DNA is4.6$\times{10}^6$bp

  2. A nitrogenous base is linked to pentose sugar through phosphodiester linkage

  3. X-ray diffraction data of Maurice Wilkins and Rosalind Franklin was the basis of Watson and Crick's DNA model

  4. DNA is an acidic substance was first identified by Watson and Crick
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Watson and Crick relied heavily on experimental data, including the X-ray diffraction images produced by Rosalind Franklin and Maurice Wilkins, to deduce the double helix structure of DNA. The other statements contain factual inaccuracies regarding base pairing links, genome size, or historical attribution.

Multiple choice plant kingdom biology

Smallest unit in the plant cell wall is

  1. Micelle

  2. Microfibril

  3. Fibril

  4. None of these.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In plant cell wall structure, the micelle is considered the smallest unit, consisting of a bundle of cellulose chains.

Multiple choice plant kingdom biology

Laminarin and mannitol, the reserve food of brown algae, are

  1. lipids

  2. complex carbohydrates

  3. proteins

  4. lipoproteins
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The food in the members of Phaeophyceae is stored as complex carbohydrates in the form of laminarin or mannitol.

Multiple choice plant kingdom biology

Consider the following statements.
a. Ectocaipus has an alternation of isomorphic generations
b. Fucus has no free living haploid generation
c. All red algae are multicellular organisms
d. Brown algae have a few unicellular species
Which of these statements are correct?

  1. $1, 2, 3$ and $4$
  2. $2, 3$ and $4$
  3. $1, 3$ and $4$
  4. $1$ and $2$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

All four statements are correct: Ectocarpus shows isomorphic alternation of generations, Fucus is diplontic (no free-living haploid generation), red algae are multicellular, and some brown algae (like some species of Ectocarpus) are unicellular.

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

Development of sporophyte/embryo from gametophytic tissue without fusion of gametes is?

  1. Apospory

  2. Apogamy

  3. Apomixis

  4. Parthenogenesis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Apogamy is the development of a sporophyte from the gametophyte without the fusion of gametes (syngamy).

Multiple choice microsporophyll vs megasporophyll plant kingdom biology
A translator consists of.

  1. A pollinium, a caudicle and a corpusculum

  2. Two pollinia, two caudicles and two corpuscula

  3. Two pollinia, two caudicles and one corpusculum

  4. Two pollinia and one corpusculum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The translator is the special structure to aid the unique type of pollination mechanism of Asclepiads. It is present both in the Periplocoideae and in the Cynanchoideae. In these sub-families, it consists of the three parts which are corpuscular, pollinia or pollen and two caudicles. These are the structures of the attachment to stigma. Pollen carrier encloses the pollen grains. Caudicles are connective to attach the pollen mass with corpuscular.

Therefore option C is most suitable.

Option C is correct.

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

Karyogamy is?

  1. Fusion of two germ cells

  2. Fusion of two gametic nuclei

  3. Fusion of a somatic cell and a reproductive cell

  4. Fusion of two somatic cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Karyogamy is the final step that is conducting the process of fusing two haploid eukaryotic cells together. It then refers specifically to the fusion of the two nuclei. For its occurrence, the cell membrane and cytoplasm of each cell must fuse by the process termed as plasmogamy. It is a common feature of all diploid organisms undergoing sexual reproduction.

Therefore the correct answer is option B.

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

Number of prothallial cells present in the male gametophyte of angiosperms is?

  1. One

  2. Two

  3. Many

  4. Zero
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In angiosperms, the male gametophyte (pollen grain) is highly reduced and does not contain prothallial cells, unlike the male gametophytes of gymnosperms or pteridophytes.

Multiple choice microsporophyll vs megasporophyll plant kingdom biology

A primitive massive nucellus occurs in some ovules. The condition is called.

  1. Crassinucellate

  2. Tenuinucellate

  3. Resupinate ovule

  4. Protonucellate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A crassinucellate ovule is one in which the nucellus is massive and well-developed, typically resulting from the division of the primary parietal cell.