Agriculture - Online Test
Q1. Peristome of Moss takes part in
Answer : Option B
Explaination / Solution:
All moss capsules have an operculum and peristome. During spore dispersal , peristome teeth bend outwards and spores fall out of the capsule and are carried by air currents.
Q2. The single chlorophyll molecule forms a
Answer : Option D
Explaination / Solution:
The single chlorophylla molecule forms the reaction centre. The reaction centre is different in both the photosystems. In PS I the reaction centre is chlorophyll a.
Q3. Inheritance of skin colour in humans is an example of
Answer : Option C
Explaination / Solution:
Skin colour in human being is an example of polygenic inheritance. Eight different genes are involved in deciding the skin colour ranging between white to black.
Q4. The complex V is also known as
Answer : Option B
Explaination / Solution:
complex V or ATP synthase can be separated into 2 parts:
Fo - the portion embedded in the inner mitochondrial membrane and
F1-ATPase — the portion projecting into the matrix of the mitochondrion. This
is why the intact ATP synthase is also called the FoF1-ATPase.
Q5. Ancestors of mammals belongs to
Answer : Option A
Explaination / Solution:
The ancestor of mammals belongs to class Therapsida.Therapsida is a group of synapsids that includes mammals and their ancestors.
Q6. Which of the following do not undergo any secondary growth?
Answer : Option B
Explaination / Solution:
Secondary growth in monocotyledonous roots is not observed as cambium is absent between xylem and phloem in a vascular bundle.
Q7. Which hormone is responsible for dormancy?
Answer : Option A
Explaination / Solution:
Abscistic acid encourages fruit to drop and leaves to fall. When the plant is low on water abscistic acid closes the stomata, pores in the leaves. It encourages both seeds and plants to go dormant.The hormone induces seeds to produce proteins to store when the seeds are dormant.
Q8. The internal buds produced by Spongila is known as
Answer : Option A
Explaination / Solution:
Gemmules are internal buds found in sponges and are involved in asexual reproduction. It is an asexually reproduced mass of cells, that is capable of developing into a new organism i.e., an adult sponge
Q9. A water melon has water percentage about
Answer : Option C
Explaination / Solution:
Each bite of watermelon contains about 92 percent water and 6 percent sugar. Since it consists mostly of water, its name makes perfect sense! Despite being mostly water with a bit of sugar, watermelon is considered a very healthy snack. Its high water content helps keep you hydrated.
Q10. Double fertilisation is fusion of
Answer : Option D
Explaination / Solution:
Double fertilisation is the fusion of Syngamy and triple fission. One male gamete fertilizes the egg and other male gamete fuse with two polar nuclei called triple fission.
