Thorn of Bougainvillea and tendril of cucurbita are example of
Options
(a) analogous organ (b) homologous organs (c) vestigial organs (d) retrogressive evolution
Correct Answer:
homologous organs
Explanation:
No explanation available. Be the […]
One of the important consequences of geographical isolation is
Options
(a) preventing speciation (b) speciation through reproductive isolation (c) random creation of new species (d) no change in the isolated fauna
Correct Answer: […]
Which one of the following structure between two adjacent cells is an effective transport pathway?
Options
(a) Plasmodesmata (b) Plastoquinones (c) Endoplasmic reticulum (d) Plasmalemma
Correct Answer:
Plasmodesmata
Explanation:
Plasmodesmata are the structure […]
Semi-conservative replication of DNA was first demonstrated in:
Options
(a) Escherichia coli (b) Streoticiccys obeynibuease (c) Salmonella typhimurium (d) `Drosphila melanogaster
Correct Answer:
Escherichia coli
Explanation:
Semi conservative replication of DNA was first […]
Of the total incident solar radiation the proportion of PAR is:
Options
(a) about 70% (b) about 60% (c) less than 50% (d) more than 80%
Correct Answer:
less than 50%
Explanation:
Out of […]
Nitrogen fixation in root nodules of Alnus is brought about by:
Options
(a) Bradyrhizobium (b) Clostridium (c) Frankia (d) Azorhizobium
Correct Answer:
Frankia
Explanation:
The most common symbiotic association of legume and bacteria […]
Male and female gametophytes are independent and free living in
Options
(a) Mustard (b) Castor (c) Pinus (d) Sphagnum
Correct Answer:
Sphagnum
Explanation:
Sphagnum is a bryophyte in which male and female gametophytes are […]
DNA or RNA segment tagged with a radioactive molecule is called
Options
(a) Vector (b) Probe (c) Clone (d) Plasmid
Correct Answer:
Probe
Explanation:
No explanation available. Be the first to write the […]
An example of a seed with endosperm, perisperm, and caruncle is
Options
(a) coffee (b) lily (c) castor (d) cotton
Correct Answer:
castor
Explanation:
An example of a seed with endosperm, persperm, and […]
A prokaryotic autotrophic nitrogen fixing symboint is found in:
Options
(a) Alnus (b) Cycas (c) Cicer (d) Pisum
Correct Answer:
Cycas
Explanation:
A prokaryotic autotrophic nitrogen fixing symbiont is found in Cycas.
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