BIOLOGY 1 Marks Question

Palmately compound leaves are found in the silk cotton tree.

When the gynoecium is located at the top of the flower, then the flower is called hypogynous.

Flower is a modified form of shoot.

After fertilisation, fruit is formed from the ovary and seed is formed from the ovule.

Petunia is an ornamental plant. It comes in the Solanaceae family.

The fruit of Solanaceae family is berry or capsule type.

The botanical name of potato is Solanum tuberosum.

1. Belladonna 2. Ashwagandha

The outer covering of endosperm separates the embryo by a proteinous layer called aleurone layer.

In plants such as bean, gram and pea, the endosperm is not present in mature seeds and such seeds are called non-endospermous.

The seed coat has two layers, the outer testa and the inner tegmen.

In mango, the inner fruit wall is hard and stony.

Mango (fruit) develops from monocarpellary su- perior ovaries.

The arrangement of ovules within the ovary is known as placentation.

Monoadelphous stamens are found in Hibiscus.

(1) Male reproductive organ - Androecium

The number of ovules in peas is five (5).

In Calotropis, valvate aestivation is found.

Parallel venation is found in monocotyledon plants.

Leaves produce food for the plant.

When the stem is young it is usually green.

Root hairs absorb water and mineral salts from the soil.

The root is covered at the apex by a thimble-like structure called the root cap.

The plumule and radicle are enclosed in sheaths which are called coleoptile and coleorhiza respectively.

Fruits that develop without fertilisation are called parthenocarpic fruits.

When the anthers in the stamens are underde- veloped and pollen grains are not formed in them. This type of stamens are incapable of reproducing, hence sterile sta- mens are called staminodes.

When a flower can be divided into two similar halves only in one particular vertical plane, it is zygomorphic or bilateral symmetry.

In palmately compound leaves, the leaflets are attached at a common point, i.e., at the tip of petiole, as in silk cotton.

Neem is an example of pinnately compound leaves.

Leaves are attached to the stem with the help of petioles.

Fibrous root system.

Endosperm.

Basipetal order.

The leaf base is swollen which is called the pul- vinus and is found in leguminous plants.

Wolffia.

The smallest seed is of orchids and the largest seed is of double coconut.

Reticular venation.

The veins of the leaf provide strength to the leaf

Bicarpellary obligately placed, syncarpous; ovary superior, bilocular, placenta swollen with many ovules, axile.

Fabaceae.

Leaves are attached anteriorly on the stem.

Solanaceae.