Which one of the following genus of insects prefer to breed in clean water and their larvae lie parallel to the surface of water?
Anopheles
Culex
Aedes
Phlebotomus
Oral contraceptive pill is composed of
oestrogen and progesterone
oestrogen and testosterone
progesterone and testosterone
oestrogen and growth hormone
A man having the genotype EEFfGgHH can produce P number of genetically different sperms and a woman of genotype IiLLMmNn can generate Q number of genetically different eggs. Determine the values of P and Q.
P - 4; Q - 4
P - 4; Q - 8
P - 8; Q - 4
P - 8; Q - 8
In an organism, tall phenotype is dominant over recessive dwarf phenotype and the alleles are designated as T and t, respectively. Upon crossing two different individuals, total 250 offsprings were obtained, out of which 124 displayed tall phenotype and rest were dwarf Thus, the genotype of the parents were
TT TT
TT tt
Tt Tt
Tt tt
A-DNA is
left-handed helix with 12 nucleotide pairs per turn
right-handed helix with 11 nucleotide pairs per turn
right handed helix with 12 nucleotide pairs per turn
left-handed helix with 11 nucleotide pairs per tum
Bursa fabricius is an important organ of birds. This organ is associated with
generation of basophil
production of uric acid
metabolism of fatty acids
generation of B-cell
Which one of the following is a population?
A spider and some trapped flies in its web
Earthworm that lives in a grassland along with other arthropods
All the plants in a forest
All the oak trees in a forest
D.
All the oak trees in a forest
Population is a near permanent group of interbreeding individuals of a species found in a space or geographical area at a particular time, e.g., all oak trees in a forest constitute population.
What would be the percentage of thymine in a double stranded DNA sample which contains 20% cytosine of the total bases?
10%
20%
30%
40%
Which one of the following is a correct match?
Filariasis - Taenia solium
Encephalitis - Culex vishnui
Malaria - Phlebotomus sp.
Kala-azar - Anopheles stephensi