Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions for Biology

A sac shaped like an upside down pear with a thick lining and muscles in the pelvic area where a fertilized egg or zygote comes to grow into a baby is called ______.

Which of the following is a finger like structure and lies at the upper junction of the two labia minora above the urethral opening?

Identify the odd one from the following.

Where does the ovum receive the sperm?

Egg is liberated from ovary in ______.

Ovulation occurs under the influence of ______.

In 28 days human ovarian cycle, ovulation occurs on ______.

The estrus cycle is a characteristic of ______.

Stratum germinativum is an example of which kind of epithelium?

When both ovaries are removed from rat which hormone is decreased in blood?

Bartholin’s glands are situated ______.

Which part of ovary in mammals acts as an endocrine gland after ovulation?

The second maturation division of the mammalian ovum occurs ______.

After birth, colostrum is released from mammary glands which is rich in ______.

Extra-embryonic membranes of the mammalian embryo are derived from ______.

Cleavage in mammalian egg is ______.

Choose the correct option:

Sterilisation techniques are generally fool proof methods of contraception with least side effects. Yet, this is the last option for the couples because:

1. It is almost irreversible
2. Of the misconception that it will reduce sexual urge/drive
3. It is a surgical procedure
4. Of lack of sufficient facilities in many parts of the country

Emergency contraceptives are effective if used within ______.

Choose the right one among the statements given below.

Condoms are one of the most popular contraceptives becuase of the following reasons.