STD 11 - 8. Cell the unit of life — NEET STD 11 Science — Question

Select the correct option from the following

Protein directly cannot be used as a respiratory substrate, it breaks down into

The historic Convention on Biological Diversity, 'The Earth Summit' was held in Rio de Janeiro in the year

The suffix-phyta indicates

Phytohormones are

Choose correct statement for cytokine and mark correct option :
(i) It is a simple gaseous PGR.
(ii) It synthesised in large amounts by tissues undergoing senescence and ripening fruits.
(iii) Influences of it on plants include horizontal growth of seedlings, swelling of the axis and apical hook formation in dicot seedlings.
(iv) It promotes senescence and abscission of plant organs especially of leaves and flowers.
(v) It synthesised in regions where rapid cell division occurs, for example, root apices, developing shoot buds, young fruits, etc.
(vi) It helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation.
(vii) It help overcome the apical dominance.
(viii) They promote nutrient mobilisation which helps in the delay of leaf senescence.

It does not include in limitations of ecological pyramid.

Which of the following is important in electron transport system

Storage bodies, pyrenoids in the chloroplast contain