ICSE Class 10 Answered

1)Natality: The number of live births per 1000 people of population per year is called natality or birth rate.

2)Monohybrid cross: A cross which involves only a single pair of contrasting characters is called a monohybrid cross.

3)Dihybrid cross: A cross that involves plants with two pairs of contrasting characters is called a dihybrid cross.

4)Greenhouse effect: Steady increase in the Earth's average lower atmosphere temperature due to heat retention caused by the accumulation of greenhouse gases (carbon dioxide, methane, nitrous oxides, and CFCs) is called greenhouse effect.

5)Hormones: A hormone is a secretion from some glandular part of the body, which is poured into the blood and which acts on the target organs or cells of the same individual.