[" A-BIS The breaching and respiration "],[" in woody stem of a plant fakes "],[" place through."],[" a) roothair ( "b" ) senticels ( "],[" ¿) closed stomate "5" (d) open abmutal "],[hline]

The breathing and respiration in woody stem of a plant takes place through:

In older portion of roots and woody stems, the exchange of gases takes place through small openings called _______.

Mango and guava plants are propagated through (A) Stem cutting (B) Layering (C) Grafting (D) Tissue culture

Plants identical to mother plant can be obtained through. (A) Seed (B) Stem cutting (C) Both (A) and (B) (D) None of these

The organs A of a tree have a large number of tiny pores called B on their surface. Each pores is surrounded by a pair of cells called C. the opening and closing of pores in A is controlled by C. the gas D present in air enters the organs A through pores B and utilised in food making process E. the gas F produced during process E goes out through te same pores B. what are A, B, C, D, E, and F?

Which one of the following phyla is correctly matched with its two general characteristics? (a) Arthropoda : Body divided into head, thorax and abdomen and respiration by tracheae . (b) Chordata : Notochord at some stage and separate anal and urinary openings to the outsides (c) Echinodermata : pentamerous radial symmetry and mostly internal fertilization (d) Mollusca : Normally oviparous an development through as trochophore or veliger larva

Classify the following as open, closed, or isolated system. a. A beaker containing as open, boiling water. b. A chemical reaction taking place in an enclosed flask. c. A cup of tea placed on a table. d. Hot water placed in perfectly insulated closed container. e. A thermos flask containing hot coffee.

Which part in the plant Bryophyllum takes place in vegetative reproduction ? (A) Stem (B) Floral buds (C) Underground roots (D) Buds in leaf margin

Consider the situation shown in the figure. The switch S is open for a long time and then closed and again steady state reached then (a) Find the charge flown through the battery after the switch S is closed. (b) Find the charge flown through the switch S from B to A. (c) Find the work done by the battery after the switch S is closed. (d) Find the change in energy stored in the system of capacitors. (e) Find the heat developed in the system after the switch S is closed.