Identify the correct set of statements : (a) The leaflets are modified into pointed hard thorns in Citrus and Bougainvillea (b) Axillary buds form slender and spirally coiled tendrils in cucumber and pumpkin (c) Stem is flattened and fleshy in Opuntia and modified to perform the function of leaves (d) Rhizophora shows vertically upward growing roots that help to get oxygen for respiration (e) Subaerially growing stems in grasses and strawberry help in vegetative propagation Choose the correct answer from the options given below :

What is the full form of IUDs?

Given below are two statements: Statement I: The primary source of energy in an ecosystem is solar energy. Statement II: The rate of production of organic matter photosynthesis in an ecosystem is called net primary productivity (NPP). In the light of the above statements, choose the most appropriate answer from the options given below.

Which one of the following is not a method of in situ conservation of biodiversity?

A 'new' variety of rice was patented by a foreign company though such varieties have been present in India for a long time. This is related to?

Given below are two statements: Statement I: In an ecosystem, there is unidirectional flow of energy of sun from producers to consumers. Statement II: Ecosystems are exempted from 2nd law of thermodynamics. In the light of the above statements, choose the most appropriate answer from the options given below:

The site of perception of light in plants during photoperiodism is

In RNAi, the genes are silenced using:

Consider the pyramid of energy of an ecosystem given below : If T4 is equivalent to 1000 J, what is the value of T1?