biology Class 8

When a sperm having X-chromosome fuses with the ovum, the child born will be

• male

• female

• male as well as female twin

• it depends on the chance of fusion

Adam’s apple is

• enlarged larynx

• mammary glands

• apple of adam

• enlarged pharynx

The chemical substances which are secreted from endocrine glands are called

• puberty

• hormones

• estrogen

• adolescence

What is the stoppage of menstruation called?

• Menarche

• Menopause

• Gametes

• Insulin

Production of thyroxin requires

• sodium

• magnesium

• iodine

• bromine

The change from larvae to adult is called

• Metabolism

• Metamorphosis

• Metastasis

• Morphology

Which of the following viruses causes AIDS?

• H1N1 virus

• Zika virus

• HIV

• Rhinovirus

In girls, the ovaries and eggs become mature and ovaries begin to release ovum by the process of ______.

• Ovulation

• fertilisation

• oogamy

• oogenesis

A human gamete has ________ sex chromosome(s).

• one

• four

• half

• two

Deficiency of which hormone causes diabetes?

• Insulin

• Estrogen

• Testosterone

• Thyroxin