Model Paper 4 — NEET STD 11 Science — Question

Under what condition, the upright pyramid of biomass becomes inverted

Polyarch xylem bundles are found in

Which of the following is the characteristic of plants

What is not correct for genetic code?

Which of the following represents largest man made ecosystem?

Fill in the blanks and choose the correct option given below.
(i) A prom l otes senescence and abscission of plant organs especially of leaves and flowers.
(ii) The rise in rate of respiration during ripening of fruits is called as respiratory B.
(ii) C regulates many physiological processes so it is the one of the most widely used PGR in agriculture.
(iv) The most widely used compound as source of ethylene is D.
(v) Ethephon hastens fruit ripening in tomatoes and apples and accelerates E in flowers and fruits.
(vi) F is general plant growth inhibitor and an inhibitor of plant metabolism.
(vii) G stimulates the closure of stomata in the epidermis and increase the tolerance of plants to various kinds of stresses. It is also called the H hormone.
(viii) I helps seeds to withstand desiccation and other factors unfavorable for growth. In most situations, it acts as an antagonist to J.
(ix) The response of plants to periods of day/night is termed K.
(x) The sites of perception of light/dark duration are the L in plants.
(xi) The hormonal substance migrates from M to N apices for inducing flowering only when the plants are exposed to the necessary inductive photoperiod.
(xii) There are plants for which flowering is either quantitatively or qualitatively dependent on exposure to low temperature. This phenomenon is termed O.

A specimen of fungus is brought by a student for identification. Upon close examination, he discovered that its hyphae are completely septate and it has gills on the underside of the pileus. To which fungal group does it most likely belong?

The sporophytic phase in Funaria is well developed and is composed of

Lenticels are involved in :