Question Bank Solutions for HSC Science (General) 12th Board Exam - Maharashtra State Board

Why aquatic animals can afford to be ammonotelic?

What is Red Data Book?

Which of the following is a chemical transmitter in the synapse of neurons?

Vermiform appendix is an example of __________ organ.

(A) vestigeal

(B) homologous

(C) sense

(D) analogous

The phenomenon of industrial melanism demonstrates__________

(a) natural selection

(b) induced mutations

(c) reproductive isolation

(d) geographical isolation

By which process ammonia is converted into urea in liver?

Select and write the most appropriate answer from the given.

Identify the type of isolation where the members of two populations have different mating behaviour which prevents interbreeding: 

Select and write the most appropriate answer from the given. 
Which stage in the life cycle of silk moth secretes silk? 

Multiple choice question.

Insect pollinated flowers usually posses ______

Multiple choice question.

In ovule, meiosis occurs in ______

Multiple choice question.

The ploidy level is not the same in ______.

Multiple choice question.

Which of the following types require pollinator but the result is genetically similar to autogamy?

Multiple choice question.

If diploid chromosome number in a flowering plant is 12, then which one of the following will have 6 chromosomes?

Multiple choice question.

In angiosperms, endosperm is formed by/ due to ______

Multiple choice question.

Point out the odd one.

Multiple choice question.

The number of nuclei present in a zygote is _______.

Multiple choice question.

Which of these is the male reproductive organ in humans?

Multiple choice question.

Presence of beard in boys is a _______.

Microorganisms also help in production of food like ______________.

Multiple Choice Question:

The molecular knives of DNA are _______.