An example of osmosis in plants is the
movement of water through the xylem
loss of water vapour from the stomata
translocation of food through the phloem
absorption of water from the soil by the root
Correct answer is D
Osmosis is responsible for the ability of plant roots to draw water from the soil. Plants concentrate solutes in their root cells by active transport, and water enters the roots by osmosis.
Which of the following cell organelles is the site for the production of ATP?
Lysosome
Nucleus
Mitochondrion
Ribosome
Correct answer is C
The production of ATP happens in the mitochondrion, which likewise exists in both animals and plants.
Which of the following organisms cannot exist freely on its own?
Chlamydomonas
Amoeba
Paramecium
Plasmodium
Correct answer is D
The plasmodium is a single-celled parasite that multiplies in red blood cells of humans as well as in the mosquito intestine. Hence, it doesn't live freely.
The structural similarities in Paramecium and Euglena are in the
shape of locomotory organs
blunt anterior and pointed posterior
presence of micro and mega nuclei in both
presence of anterior and posterior contractile vacuoles
Correct answer is B
No explanation has been provided for this answer.
Which of the following groups of animals do not possess a nervous system?
Porifera
Cnidaria
Platyheminthes
Nematoda
Correct answer is A
Porifera are 'pore bearing' organisms, commonly known as sponges, are the only multicellular organisms without a nervous system. Their response to stimuli is by a contraction in their bodies.