Embryo Development

Q.

Which extra embryonic membrane in humans prevents desiccation of the embryo inside the uterus?

Q. The correct sequence of embryonic development is :

1. Blastula - Morula - Zygote - Gastrula - Embryo
2. Zygote - Blastula - Morula - Gastrula - Embryo
3. Zygote - Morula - Blastula - Gastrula - Embryo
4. Gastrula - Morula - Zygote - Blastula - Embryo

Q.

What number of blastomeres are contained in morula?

Q.

Gonads develop from embryonic

1. Ectoderm

2. Endoderm

3. Mesoderm

4. Both Mesoderm and Endoderm

Q.

Organisation of ectoderm, mesoderm and endoderm is known as

1. Implantation

2. Gastrulation

3. Blastulation

4. None of the above

Q.

The word diploblastic and triploblastic means_____&_____ number of germinal layers.

1. 2 & 3

2. 1 & 2

3. 3 & 2

4. 2 & 1

Q. In vertebrates, the blastopore becomes the anus and during cleavage, the regulatory signal in the egg is evenly distributed in the cells. An invertebrate phylum sharing these characteristics is the

1. Arthropoda
2. Annelida
3. Mollusca
4. Echinodermata

Q.

Which one develops from endoderm?

1. Nervous system, urinary bladder and eye

2. Liver, connective tissue and heart

3. Thymus, spinal cord and brain

4. Liver, pancreas and thymus/thyroid

Q. Which extraembryonic membrane prevents desiccation of the embryo inside the uterus?

1. Yolk sac
2. Amnion
3. Chorion
4. Allantois