Fetus Development

Q.

The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?

1. Fourth month

2. Fifth month

3. Sixth month

4. Third month

Q. How many cells and nuclei are present in a mature embryo sac?

1. 8 cells, 8 nuclei
2. 7 cells, 8 nuclei
3. 7 cells, 16 nuclei
4. 8 cells, 16 nuclei

Q. What does the egg apparatus of a mature embryo sac consist of?

1. One egg cell and the two polar nuclei
2. One egg cell and one central cell
3. One egg cell and the antipodal cells
4. One egg cell and the two synergids

Q.

At the cellular level, growth involves

1. Cell division, cell elongation and cell differentiation

2. Cell elongation

3. Cell differentiation

4. Cell division

Q. Sort the stages in the order they appear during the embryonic development in humans.

1. Foetus
2. Embryo
3. Morula
4. Blastocyst
5. Zygote

Q. Match the events with the month of gestation at the end of which they are evident.

1. Hair appears on head
2. Eyelids separate
3. Heart develops
4. Limbs and digits

Q. The first movement of the foetus and development of hair on its head are usually observed during which month of pregnancy?

1. Fourth month
2. Fifth month
3. Sixth month
4. Seventh month

Q.

lacunae and sinuses are present in the tissue or sorrounded by tissue ? what are haemocoel and haemolymph

Q.

Match the following:

$\begin{array}{cc}\text{i. 12 weeks}& \text{a. In a male foetus testis migrates to scrotum}\\ \text{ii. 14 weeks}& \text{b. Genitals develop accordingly}\\ \text{iii. 24 weeks}& \text{c. Covered with lanugo}\\ \text{iv. 32 weeks}& \text{d. Babys head will engage}\\ \text{v. 40 weeks}& \text{e. Organs are fully formed}\end{array}$

1. i) $\Rightarrow$ d , ii) $\Rightarrow$ c, iii) $\Rightarrow$ a, iv) $\Rightarrow$ b, v) $\Rightarrow$ e

2. i) $\Rightarrow$ c, ii) $\Rightarrow$ e, iii) $\Rightarrow$ b, iv) $\Rightarrow$ a, v) $\Rightarrow$ d

3. i) $\Rightarrow$ b, ii) $\Rightarrow$ c, iii) $\Rightarrow$ e, iv) $\Rightarrow$ a, v) $\Rightarrow$ d

4. i) $\Rightarrow$ d, ii) $\Rightarrow$ b, iii) $\Rightarrow$ a, iv) $\Rightarrow$ c, v) $\Rightarrow$ e

Q.

The weight of a typical full-term baby is around -

1. 2.5 - 5 kg

2. 2.0 - 4 kg

3. 1.0 - 3 kg

4. 5.0 - 6.0 kg

Q.

what is the function of cortex in apoplastic or symplast movement of water

Q. Name The Method by which Cytokinesis occurs in haploid cell?