Agriculture - Online Test
Q1. Arrange the following in descending order based upon number of carbon atoms in Kreb cycle a) α-ketoglutaric acid b) citric acid c) Acetyl coA d) Succinic acid
Answer : Option C
Explaination / Solution:
In kerb cycle citric acid consists of 6C atoms ,α-ketoglutaric acid consist of 5C atoms, succinic acid consists of 4 C atoms and Acetyl co A consists of 2C atoms,
Q2. The form of thalamus in which ovary is at tops and stamens, petals and sepals are born below is called
Answer : Option D
Explaination / Solution:
In hypogamous flowers the ovary is at tops and stamens, petals and sepals are borne below on the thalamus. The ovary is called superior.
Q3. The casparian thickening occurs in the cells of
Answer : Option C
Explaination / Solution:
The tangential as well as radial walls of the endodermal cells have a deposition of water-impermeable, waxy material-suberin-in the form of casparian strips.
Q4.
If is the final size, is initial size, r is growth rate and t is time of growth than Exponential growth is represented by
Answer : Option A
Explaination / Solution:
Exponential growth is represented by initial size and growth rate and time. If is the final size, is the initial size, r is growth rate and t is the time of growth than exponential growth is
Q5. Which plant can propagated Vegetatively by leaf
Answer : Option A
Explaination / Solution:
Bryophyllum plants grow in marshy areas where seeds are not able to germinate. The leaf margin of Bryophyllum contains numerous plantlets before falling on muddy land.
Q6. otal water content presenTt in the soil is called
Answer : Option B
Explaination / Solution:
Total water content present in the soil is called holard. Out of this, the water which can be absorbed by the plant is called chresard and remaining is called echard.
Q7. Embryology is
Answer : Option B
Explaination / Solution:
Embryology is the branch of biological science in which we study about spore, fertilisation as well as formation of embryo. It is not just the formation of embryo from zygote.
Q8. Function of laghaemoglobin during biological nitrogen fixation in root nodules of legumes is to
Answer : Option A
Explaination / Solution:
During biological nitrogen fixation in root nodules of legumes, laghaemoglobin provide protection to the nitrogenase from Oxygen.
Q9. Archegoniophore occurs in
Answer : Option C
Explaination / Solution:
Archegoniophore (female gametophytes ) develop on the thallus of Marchantia. Each archegonium produces a single egg cell which helps in sexual reproduction.
Q10. The splitting of water molecules is associated with
Answer : Option B
Explaination / Solution:
This is achieved by electrons available due to splitting of water. The splitting of water is associated with the PS II; water is split into H+, [O] and electrons.
