Question

Match the following terms with their appropriate definitions.

• A. A→(iv), B→(iii), C→(i), D→(ii)
• B. A→(ii), B→(i), C→(iv), D→(iii)
• C. A→(i), B→(ii), C→(iv), D→(iii)
• D. A→(iii), B→(i), C→(iv), D→(ii)

Answer 1

The correct option is D A→(iii), B→(i), C→(iv), D→(ii)

During the advancing stages of development of the zygote, it may be referred to as by a variety of names. Life begins with a single celled zygote, which undergoes cleavage to form cells known as blastomeres. The 8-16 celled stage is referred to as morula. Morula undergoes blastulation to form blastula, which in turn undergoes gastrulation to form gastrula. The process of ovulation, fertilisation, implantation, and gastrulation is completed within the first four weeks.
We use different terms to indicate the developmental stages at different instances during the gestational period.
Embryo→ The developmental stage from 0 to 8 weeks of pregnancy.
Foetus→ The developmental stage from $9^{\mathrm{th}}$ week till the end of $9^{\mathrm{th}}$ month
Neonate→ The developmental stage after birth till 1 month.
Infant→ The developmental stage from 2${}^{\mathrm{nd}}$ month after birth till one year.