Tag: botany

Questions Related to botany

Angiosperms are classified into 

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Phanerogams and cryptogams

  2. Thallophytes and bryophytes

  3. Monocots and dicots

  4. Vertebrates and invertebrates

Show answer
Correct Option: C
Explanation:

Angiosperms are also called as flowering plants that are classified based on characteristics that include cotyledon structure, pollen grains, as well as flower and vascular tissue arrangement. Basal angiosperms, classified separately, contain features found in both monocots and dicots, as they are believed to have originated before the separation of these two main groups. Monocots contain a single cotyledon and have veins that run parallel to the length of their leaves; their flowers are arranged in three to six-fold symmetry. Dicots have flowers arranged in whorls, two cotyledons, and a vein arrangement that forms networks within their leaves. 

Therefore, the correct answer is option C.

Maize is a __________.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Dicotyledonous plant

  2. Monocotyledonous plant

  3. Crytogamae

  4. Gymnosperm

Show answer
Correct Option: B
Explanation:

Angiosperm are subdivided into two classes which are cotyledons and dicotyledons depending on the number of cotyledons in their embryo. Maize has just one cotyledon in its embryo.

Angiosperms are subdivided into two classes which are cotyledons and dicotyledons.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient

Show answer
Correct Option: A
Explanation:

Phanerogamae are the sub-kingdom of kingdom Plantae. They include seed bearing and flowering plants. They are further grouped into angiosperms and gymnosperms. Angiosperms are subdivided into two classes which are cotyledons and dicotyledons depending on the number of cotyledons in their embryo.

What is true of angiosperms?

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Seeds are naked

  2. They have tracheids only

  3. They are not cryptogams

  4. They lack companion cells

Show answer
Correct Option: C

Endosperm cell of an angiosperm has $24$ chromosomes. The number of chromosomes in the gametes would be.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. $8$

  2. $16$

  3. $24$

  4. $48$

Show answer
Correct Option: A

In angiosperms, a mature male gametophyte is formed from a pollen mother cell through.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Two meiotic divisions

  2. Three mitotic divisions

  3. One meiotic and two mitotic division

  4. A single meiotic division

Show answer
Correct Option: C
Explanation:

Meiosis produces pollen grain. Its cell divides mitotically to form generative nucleus and tube cell. The generative nucleus undergoes another mitosis to form two male gametes.

So, the correct answer is 'One meiotic and two mitotic division'

In angiosperms, formation of two male gametes from a pollen grain involves - divisions.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. One mitotic and one mitotic

  2. Two meiotic and two mitotic

  3. Only two mitotic

  4. Only two meiotic

Show answer
Correct Option: C

A natural sequence of developmental stages in the life cycle of an angiosperm is?

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Cleavage $\rightarrow$ Fertilization $\rightarrow$ Differentiation $\rightarrow$ Fruit formation

  2. Pollination $\rightarrow$ Fertilization $\rightarrow$ Seed formation $\rightarrow$ Germination

  3. Germination $\rightarrow$ Double fertilization $\rightarrow$ Endosperm formation $\rightarrow$ Seed dispersal

  4. Maturation $\rightarrow$ Mitosis $\rightarrow$ Differentiation $\rightarrow$ Fertilization

Show answer
Correct Option: B

Centrospermae is regarded a natural order of angiosperms. All except two of its families contain the pigments that are collectively called battalions. Some of the families of the order are enumerated below. Which two families lack betalains?
a. Amaranthaceae
b. Aizoaceae
c. Chenopodiaceae
d. Caryophyllaceae
e. Mouginaceae
Select the correct answer using the codes given.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. $1$ and $2$

  2. $2$ and $3$

  3. $3$ and $4$

  4. $4$ and $5$

Show answer
Correct Option: A

The male germ unit(MGU) in angiosperms comprises of __________________.

botany plant biology introduction to angiosperms phanerogams angiosperms

  1. Vegetative nucleus and the generative cell

  2. The two sperm cells

  3. Vegetative nucleus and one of the sperms

  4. Vegetative nucleus arid the two sperms

Show answer
Correct Option: A