Biology - Online Test
Q1. Contraceptive pills are taken for _______ days starting from 5th day menstruation
Answer : Option C
Explaination / Solution:
Contraceptive pills are taken for 21days starting from 5th day of menstruation. They increase the female hormone levels to obstruct in ovulation process.
Q2. Which layer produces new cell by mitosis?
Answer : Option C
Explaination / Solution:
Stratum Malpighi is the basal layer of skin epidermis having basal layer and generative layer that produces new cells by mitosis.
Q3. Sexual reproduction is by copulation of male and female followed by embryological development is characteristic feature of
Answer : Option D
Explaination / Solution:
The sexual reproduction in kingdom Animalia is by copulation of male and female followed by embryological development.
Q4. During symplastic movements, the water travels through
Answer : Option B
Explaination / Solution:
During symplastic movement, the watertravels through the cells – their cytoplasm; intercellular movement isthrough the plasmodesmata. Water has to enter the cells through the cell membrane; hence the movement is relatively slower.
Q5. Statement I: Embryos of monocotyledons possesses only one cotyledon.
Statement II: In grass family cotyledon is called as scutellum.
Statement III: In monocotyledonous embryo radicle and root cap is covered by coleoptile.
Statement II: In grass family cotyledon is called as scutellum.
Statement III: In monocotyledonous embryo radicle and root cap is covered by coleoptile.
Answer : Option A
Explaination / Solution:
monocotyledonous embryo contain only one cotyledon. In grass family, cotyledon is called as scutellum. In monocotyledonous embryo radicle and root cap is covered by coleorhiza.
Q6. The number of births in polygamous population is often directly related to
Answer : Option B
Explaination / Solution:
Polygamous population is often directly related to number of females in the population. Polygamy means having more than one female partner with single male that can reproduce.2
Q7. Sulphur is important nutrient for optimum growth and productivity of
Answer : Option A
Explaination / Solution:
Sulphur is an important nutrient for optimum growth and productivity of pulse crops, because sulphur is important in protein synthesis of plants.
Q8.
Trans fats :
i. they are found in most processed and fast foods for eg. French fries.
ii. they help food stay fresh for long time.
iii. they are much better type of fat than the saturated fats.
Answer : Option A
Explaination / Solution:
Trans fats are hydrogenated fats which makes the oil more solid. They are found in most processed and fast foods. They help food stay fresh for long time.
Q9. Which of the following factor do not motivate youngsters towards drug and alcohol use?
Answer : Option D
Explaination / Solution:
Curiosity, need for adventure and excitement and experimentation constitute common causes, which motivate youngsters towards drug and alcohol use.
Q10. Read the following :
i. In human iris, contraction of sphincter muscles widens the pupil in dim light to let in more light.
ii. The amount of pigment in the ciliary body of eye provides eye with its characteristic colour.
i. In human iris, contraction of sphincter muscles widens the pupil in dim light to let in more light.
ii. The amount of pigment in the ciliary body of eye provides eye with its characteristic colour.
Answer : Option C
Explaination / Solution:
Human eyes contain iris that is responsible for changing size of pupil to allow or preventthe amount of light entering the eyeball. Cons cells present in retina are responsible for colour perception.
