STD 11 - 3. Plant kingdom — NEET STD 11 Science — Question

Choose wrong statement for Abscisic acid (ABA) :
(i) It acts as a general plant growth inhibitor and an inhibitor of plant metabolism.
(ii) ABA inhibits seed germination.
(iii) ABA stimulates the closure of stomata
(iv) Increases the tolerance of plants to various kinds of stresses. Therefore, it is also called the stress hormone.
(v) ABA plays an important role in seed dormancy,
(vi) In most situations, ABA acts as an antagonist to GAs

The fungi form fruiting bodies in which _________ division occurs, leading to formation of _________ spores.

For the observation of Kranz anatomy which plant is useful?

Assertion: Meiosis-l is reductional division while meiosis-II is equational division.
Reason: In meiosis-I chromosome numbers become half in compare to parental cell while in meiosis-II no change in chromosome number.

Asteroid hormone is progesteron secreted by corpus leutium (mass of cells in ovary) What is correct for corpus leutium cells ?

Choose the correct one for basidiomycetes from given statements.
(i) They grow in soil, on logs and tree stumps and in living plant bodies as parasites.
(ii) The asexual spores are generally found and vegetative reproduction by fragmentation is common.
(iii) Sex organs are absent, but plasmogamy is brought about by fusion of two somatic cells of different strains.
(iv) Karyogamy and meiosis take place in the basidium producing eight basidiospores.
(v) The basidiospores are exogenously produced on the basidium.
(vi) The basidia are arranged in fruiting bodies called basidiocarps.

Enzyme are best defined as