In Pisum sativum, there are 14 chromosomes. How many types of homologous pairs can be prepared?
14
7
214
210
A.
14
Pisum sativum is a angiospermic plant. In angiosperms diploid chromosomes are present, that is, plant body belongs to sporophytic generation (2n).
In Pisum sativum, 2n=14
Therefore, there are 7 types of homologous pairs in Pisum sativum.
Sporogony of malarial parasite occurs in
liver of man
RBCs of man
salivary glands of mosquito
stomach wall of mosquito
Pure tall plants are crossed with pure dwarf plants. In the F1 generation, all plants were tall. These tall plants of F1 generation were selfed and the ratio of tall to dwarf plants obtained was 3 : 1. This is called
dominance
inheritance
codominance
heredity
The presence of diversity at the junction of territories to two different habitats is known as
bottleneck effect
edge effect
junction effect
Pasteur effect
In Cycas, pollination takes place in
3- celled stage
4- celled stage
2- celled stage
1- celled stage
Benthic organisms are found in
surface of marine water
middle of water in sea
bottom of sea
on ground
Ozone depletion in staratosphere would result in
forest fires
global warming
skin cancer incidence
None of the above
