Which of the following is an accumulation and release centre of neurohormones?

Withdrawal of which of the following hormones is the immediate cause of menstruation?

1. Estrogen

2. FSH

3. FSH-RH

4. Progesterone

Which one of the following statements is incorrect?

Which one of the following has an open circulatory system?
1. Pheretima
2. Periplaneta
3. Hirudinaria
4. Octopus

Which hormone causes dilation of blood vessels, increased oxygen consumption, and glucogenesis?

1. ACTH

2. Insulin

3. Adrenalin

4. Glucagon

The causative agent of mad-cow disease is a:

1. bacterium

2. prion

3. worm

4. virus

The translocation of organic solutes in sieve tube members is supported by:

1. root pressure and transpiration pull

2. P-proteins

3. mass flow involving a carrier and ATP

4. cytoplasmic streaming

Biradial symmetry and lack of cnidoblasts are the characteristics of:

1. Starfish and sea anemone

2. Ctenoplana and Beroe

3. Aurelia and Paramecium

4. Hydra and starfish

The arrangement of the nuclei in a normal embryo sac in the dicot plants is:

1. 2+4+2

2. 3+2+3

3. 2+3+3

4. 3+3+2

An enzyme that can stimulate the germination of barley seeds is:

1. $\mathrm{\alpha }$-amylase

2. lipase

3. protease

4. invertase