Question

Name the small openings present on leaves which cause transpiration.
And Define Pistil of a flower.
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Answer 1

Answer:

Answer: 1 Stomata are minute aperture structures on plants found typically on the outer leaf skin layer, also known as the epidermis. They consist of two specialized cells, called as guard cells that surround a tiny pore called a stoma. Water is transient in plants. Less than 1% of the water reaching the leaves is used in photosynthesis and plant growth. Most of it is lost through the stomata in the leaves. This water loss is known as transpiration.

Answer : 2

Pistil, the female reproductive part of a flower. The pistil, centrally located, typically consists of a swollen base, the ovary, which contains the potential seeds, or ovules; a stalk, or style, arising from the ovary; and a pollen-receptive tip, the stigma, variously shaped and often sticky. In pollination, compatible pollen grains land on the stigma and then germinate, forming a pollen tube. The pollen tube grows down through the tissue of the style to deposit sperm for the fertilization of the ovules in the ovary. Pistils in the collective sense form the gynoecium, in distinction to the male reproductive parts, or androecium

Explanation:

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Answer 2

1.stomata

Stomate, also called stoma, plural stomata or stomas, any of the microscopic openings or pores in the epidermis of leaves and young stems. Stomata are generally more numerous on the underside of leaves.

2.

Transpiration is caused by the evaporation of water at the leaf–atmosphere interface; it creates negative pressure (tension) equivalent to –2 MPa at the leaf surface. ... Evaporation from the mesophyll cells produces a negative water potential gradient that causes water to move upwards from the roots through the xylem.

3.This flask shaped organ of a flower is called pistil. The pistil is the female part of a flower. A pistil is made up of three organs: stigma ,style and ovary.