Biology - Online Test
Q1. The limbless amphibian is
Answer : Option C
Explaination / Solution:
Ichthyophis is an amphibian which is limbless. Sometimes called as Asian caecilians. They are found in southeast Asiaand the southern Philippines
Q2. In arborescent monocots stem, a secondary cambium grows in the following type of vascular bundle is seen in
Answer : Option B
Explaination / Solution:
It is the anatomy of monocotyledonous root.
Q3. In a hierarchical system of classification of plants, which of the following taxonomic rank ends in ‘ceae’?
Answer : Option A
Explaination / Solution:
Plant families like Convolvulaceae, Solanaceae are included in the order Polymoniales mainly based on the floral characters. Hence, the correct option is Family.
Q4. Growth regulator ethylene is used for
Answer : Option C
Explaination / Solution:
Ethylene is highly effective in fruit ripening. It enhances the respiration rate during ripening of the fruits.
Q5. What is common between vegetative propagation and apomixes
Answer : Option B
Explaination / Solution:
Both vegetative propagation and apomixes are types of asexually reproduction involving not fusion of gametes. So, new progeny produced are identical to parents.
Q6. Examples of local and global nutrient cycles will be:
Answer : Option B
Explaination / Solution:
Phosphorus cycle occurs at local level in an ecosystem as it is mainly derived from soil. Carbon cycles occurs through environment and affected by different ecosystem present on earth surface. So, carbon cycle is global in nature.
Q7. Match the following :
a) Fibrous joint
b) Hinge joint
c) Ball and socket joint
d) Ellipsoid joint
(i)
(ii)
(iii)
(iv)
a) Fibrous joint
b) Hinge joint
c) Ball and socket joint
d) Ellipsoid joint
(i)
(ii)
(iii)
(iv)
Answer : Option C
Explaination / Solution:
Fibrous joint is present in skull bone, hinge joint is present in knee, ball and socket joint is present in shoulder and forelimb and ellipsoid joint is present in wrist of human beings.
Q8. Most industrialized nations are rich financially but poor in
Answer : Option A
Explaination / Solution:
Most industrialized nations are rich financially but poor in biodiversity and traditional knowledge. Biodiversity and traditional knowledge related to bio-resources are can be exploited to develop modern applications.
Q9.
Identify the intra-uterine contraceptive device from the figure given below
Answer : Option A
Explaination / Solution:
Copper-T is an intra-uterine contraceptive device that prevents the implantation of embryo as well as decrease the motility of sperm due to release of copper ions.
Q10. Which of the following leucocytes transforms into macrophages?
Answer : Option A
Explaination / Solution:
Monocytes are white blood cells or leucocytes that transform into macrophages to engulf the pathogen entering the body.
