Tag: biology

Questions Related to biology

Identify the dissimilarity between monocots and dicots.

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Monocot embryos form two leaves, dicot embryos form a single leaf

  2. Monocot flowers may consist of five petals, dicot flowers may consist of six petals

  3. Monocot leaves have a branching network of veins, dicot leaves have parallel veins

  4. Monocot roots consist of many small roots growing from a taproot, dicot roots lack a taproot

  5. Monocot vascular tissue is arranged randomly in the stem, dicot vascular tissue is arranged in a ring

Show answer
Correct Option: E
Explanation:

The flowering plants or Angiosperms are classified into two groups monocots and dicots on the basis of the nature of embryo in the seed. In monocots , the  vascular tissue is scattered throughout the stem with no particular arrangement and has no cortex. It has single cotyledon in seeds and parallel venation in leaves. Whereas, in dicots, the vascular tissue is arranged in a ring and  is divided into a cortex and stele. It has two cotyledons in seeds with reticulate venation in leaves. Thus, the correct answer is option E.

A closer look at the veins of a leaf of a given plant depicts the parallel arrangement. What can be concluded from this information?

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. The plant is a dicot.

  2. The plant is a monocot.

  3. The plant is a gymnosperm.

  4. The plant is an angiosperm.

  5. The plant is a bryophyte.

Show answer
Correct Option: B
Explanation:

Venation is the structure of the veins of the leaf. Veins transport liquids and nutrients to the cells of the leaves, and they carry photosynthetic products back to the remaining parts of the tree. Monocot leaves possess parallel venation, meaning the veins of the leaf run in parallel lines. Examples of these types of leaves include grasses, lilies and tulips. 

Thus, the correct answer is option B. 

What correctly defines mycorrhiza?

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Plants that have no vascular tissue.

  2. Nitrogen fixing bacteria that live in nodules on the roots of legumes.

  3. Primitive plants like mosses, which show a dominant gametophyte stage.

  4. Vascular bundles in the stems of tracheophytes.

  5. Symbiotic structures living in the roots of plants that increase uptake of nutrients from the soil.

Show answer
Correct Option: E
Explanation:

Mycorrhizae are the symbiotic fungi that reside in roots of higher plants and increase soil fertility by nitrogen fixation. The fungus obtains carbon compounds produced by photosynthesis from roots while the plants obtain minerals, such as phosphorus extracted by fungal threads from the soil. Thus, the correct answer is E. 

Which of the following trees/plants have seeds enclosed in the fruit?

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Angiosperms

  2. Gymnosperms

  3. Cryptogams

  4. All of the above

Show answer
Correct Option: A
Explanation:

The angiosperms are the flowering plants in which the enclosed seeds are produced. After fertilization, the ovules transform to form the seeds and the ovary develops to form the fruit. The seeds are enclosed within the fruit as compared to gymnosperms in which the seeds are naked. 

Thus, the correct answer is option A. 

Which of the following is not the characteristic feature of flowering plants?

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. They include non-woody trees and shrubs.

  2. They have stems, leaves and roots.

  3. They produce seeds.

  4. They have finely divided leaves called fronds.

Show answer
Correct Option: D
Explanation:

The pteridophytes are the plants in which the leaves are divided into small leaflets called fronds. The angiosperms are the flowering plants which include the non-woody trees and shrubs. The plant body is divided into stem, roots, and leaves. These are seed-producing plants and the seeds are covered with a seed coat. 

Thus, the correct answer is option D. 

Which of the following part is present in angiosperms?

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Petals

  2. Seed coats to protect seeds

  3. Fleshy fruit

  4. All of the above

Show answer
Correct Option: D
Explanation:

The angiosperms are the only plants which can produce flowers which are involved in the sexual reproduction. The petals are the parts of the flowers. The seeds are produced which are covered with the seed coat. There is the production of a fleshy fruit formed by the ovary after fertilization takes place. 

Thus, the correct answer is option D. 

Sperms cells of angiosperms differ from the rest of the plant groups like gymnosperms by _______________________.

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. In angiosperms the sperm cells are non-motile whereas in the others they are flagellate

  2. In angiosperms the sperm cells are produced in the pollen grain whereas in the rest they produced in the antheridium

  3. In angiosperms and gymnosperms the sperm cells are non-motile whereas in the rest they are flagellated

  4. None of the above

Show answer
Correct Option: D

The smallest angiospermic/dicot parasite is

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Arceuthobium

  2. Wolffia

  3. Cassytha

  4. Rafflesia

Show answer
Correct Option: A
Explanation:

Arceuthobium is the smallest angiospermic parasite. It is total parasite that grows on a number of forest trees including pinus and Juniper

The most conspicuous and characteristic structure of Angiosperm is.

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Flower

  2. Seeds

  3. Fruits

  4. Leaves

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Correct Option: A

Find out the similarity between gymnosperms and angiosperms

biology pictorial feature of plant kingdom phanerogams gymnosperms angiosperms

  1. Naked ovules

  2. Polyembryony

  3. Double fertilization

  4. None of the above

Show answer
Correct Option: D