STD 11 - 5. Morphology flowering plants — NEET STD 11 Science — Question

Which of the following causes delaying of senescence

It is the first process occurs in first phase of glycolysis.

In gymnosperm, the leaves are well-adapted to withstand extremes of temperature, humidity and wind. What are the xeric characters in conifers?

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.

According to widely accepted "Fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect

Persistant calyx is characteristics of

In Mucor, asexual reproduction takes place by

How many type of cells constitute a simple permanent tissue

Which of the following statements is correct with reference to enzymes?

In an ecosystem bacteria are considered as