A free living nitrogen fixing cyanobacterium, which can also form symbiotic association with the water fern Azolla is
Options
(a) Tolypothrix (b) Chlorella (c) Nostoc (d) Anabaena
Correct Answer:
Anabaena
Explanation:
Anabaena is a […]
Cells are connected by plasmodesmata, the system is
Options
(a) apoplast (b) symplast (c) cross connection (d) none of these
Correct Answer:
symplast
Explanation:
No explanation available. Be the first to write the explanation […]
Cells divide and new cells are formed from pre-existing cells. This concept was given by
Options
(a) Matthias Schleiden (b) Theodore Schwarm (c) Matthias Schleiden and Theodore Schwann (d) Rudolf Virchow
Correct Answer:
Rudolf […]
Channel proteins are involved in
Options
(a) transport of enzymes (b) water transport (c) active transport of ions (d) passive transport of ions
Correct Answer:
passive transport of ions
Explanation:
No explanation available. Be […]
Chitin is a polysaccharide found in the exoskeleton of
Options
(a) prawn (b) insects (c) crabs (d) prawn,insects,crabs, all of these
Correct Answer:
prawn,insects,crabs, all of these
Explanation:
No explanation available. Be the first […]
Chlorophyll in chlroplast is located in
Options
(a) grana (b) pyrenoid (c) stroma (d) Both grana and stroma
Correct Answer:
grana
Explanation:
No explanation available. Be the first to write the explanation for this […]
Chloroplasts of Spirogyra have
Options
(a) spiral margin (b) smooth or waxy margin (c) spine-margin (d) none of these
Correct Answer:
spiral margin
Explanation:
No explanation available. Be the first to write the explanation […]
Choose the wrong statement about excretion
Options
(a) In ureotelic organisms, ammonia is not a product of metabolism (b) In mammals, some amount of urea may be retained in the kidney matrix of ureotelics […]
Ciliates differ from all other protozoans in
Options
(a) having two types of nuclei (b) using pseudopodia for capturing prey (c) having a contractile vacuole for removing excess water (d) using flagella for locomotion
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