The function of the gap junction is to?
1. | Perform cementing to keep neighbouring cells together |
2. | Facilitate communication between adjoining cells by connecting the cytoplasm for rapid transfer of ions, small molecules and some large molecules |
3. | Separate two cells from each other |
4. | Stop substances from leaking across a tissue |
Axile placentation is present in?
1. Dianthus
2. Lemon
3. Pea
4. Argemone
Which of the following is not membrane-bound?
1. Vacuoles
2. Ribosomes
3. Lysosome
4. Mesosomes
In his classic experiments on pea plants Mendel did not use?
1. Seed color
2. Pod length
3. Seed shape
4. Flower position
During ecological succession:
1. | gradual and predictable change in the composition of species occurs in a given area. |
2. | establishment of a new biotic community is very fast in its primary phase. |
3. | the number and types of animals are constant. |
4. | changes lead to a community that is in equilibrium with the environment and is called a pioneer community. |
The body cells in cockroaches discharge the nitrogenous waste in the hemolymph mainly in the form of?
1. Ammonia
2. Potassium urate
3. Urea
4. Calcium carbonate
Which of the following biomolecules have a phosphodiester bond?
1. Fatty acids in a diglyceride
2. Monosaccharides in a polysaccharide
3. Amino acids in a polypeptide
4. Nucleic acids in a nucleotide
The UN Conference of Parties on climate change in the year 2012 was held at?
1. Durban
2. Doha
3. Lima
4. Warsaw
Arrange the following events of meiosis in a correct sequence:
I. Crossing over
II. Synapsis
III. Terminalisation of chiasmata
IV. Disappearance of nucleolus
1. | II, I, IV, III | 2. | II, I, III, IV |
3. | I, II, III, IV | 4. | II, III, IV, I |
Root pressure develops due to?
1. Active absorption
2. Low osmotic potential in Soil
3. Passive absorption
4. Increase in transpiration