Plant Morphology — 16 Biology PYQs with Answers | UKPSC PYQ Hub

Question 1

Which of the following is an example of underground stem?

Accepted Answer

Ginger. Among the given options, Ginger is an example of underground stem. Underground stems are non green stems that may take part in preparation, storing food or help in vegetative propagation.

Question 2

Name the chemical substance present in the bones and teeth.

Accepted Answer

Calcium Phosphate. Calcium Phosphate is a chemical substance necessary for the formation of bones and teeth. Among micronutrients, calcium (Ca) and inorganic phosphate (P) are the two main constituents of hydroxyapatite, the bone mineral that strengthens the mechanical resistance of the organic matrix. Plant Function/ Reproduction 12. in Plants

Question 3

Asexual reproduction takes place through budding in _______.

Accepted Answer

Yeast. Asexual reproduction through budding occurs in yeast, where a new organism develops from on outgrowth or bud on the parent organism.

Question 4

The gas used for artificial ripening of fruits is:

Accepted Answer

Ethylene and Acetylene. The gas used for artificial ripening of fruits is ethylene and acetylene.

Question 5

From which part of Cinchona plant, quinine is obtained?

Accepted Answer

Bark of stem. Quinine is an alkaloid found in the stem bark of the cinchona tree. It has been used to treat malaria since the early 1600. The bark contains alkaloids, including quinine and quinidine. Cinchona is the only economically practical source of quinine, a drug that's still recommended for the treatment of Falciparum malaria. The bark of trees during this genus is the source of a spread of alkaloids, the foremost familiar of which is quinine, an antipyretic (anti-fever) agent especially useful in treating malaria.

Question 6

Seed develops from:

Accepted Answer

Ovule. Seeds develop from the ovules in the female plant, after they have been fertilized by the pollen from the male parent plant. After fertilization, the ovary forms the fruit and the ovule forms the seed.

Question 7

Most of the water absorbed by roots of plants is through

Accepted Answer

Root hairs. Most of the water absorbed by roots of plants is through root hairs. Root hair cells are specialized epidermal cells that greatly increase the surface area of roots. The function of root hairs is to collect water and mineral nutrients present in the soil and take this solution up through the roots to the rest of the plant. They are found only in the zone of maturation.

Question 8

The Source of oxygen released during photosynthesis is

Accepted Answer

Water. The source of oxygen released during photosynthesis is water. Oxygen is released due to the photolysis of water. Sunlight helps in splitting up of the water molecules thereby releasing oxygen.