Biology Test - ...

What species is very near to extinction if conservation measures are not promptly taken?

The number of mitochondria increases in cells of:

Bark of which plant yields famous drug of malaria?

Which type of forests majorly comprises of lichens and mosses?

Bacteria protect themselves from viruses by fragmenting viral DNA with:

Match the following:

Passive immunity in newborn babies is due to:

Which one of the following is an anaerobic gram-negative cocci?

Direction: The following questions consist of two statements, one labelled as Assertion and the other Reason. Examine both the statements carefully and mark the correct choice according to the instructions given below.

Assertion: Smooth muscle fibres do not appear to be striated.

Reason: Striations occur due to regular alternate arrangements of thick and thin filaments.

Drosophila flies with XXY genotype are females, but human beings with such genotype are abnormal males. It shows that________.