Balbiani rings are sites of?
1. Lipid synthesis
2. Nucleotide synthesis
3. Polysaccharide synthesis
4. RNA and protein synthesis
Which of the following pairs is not correctly matched?
Mode of reproduction | Example | ||
(a) | Offset | (i) | Water hyacinth |
(b) | Rhizome | (ii) | Banana |
(c) | Binary fission | (iii) | Sargassum |
(d) | Conidia | (iv) | Penicilium |
1. a
2. b
3. c
4. d
Ectopic pregnancies are referred to as?
1. | Pregnancies with a genetic abnormality |
2. | Implantation of an embryo at a site other than the uterus |
3. | Implantation of the defective embryo in the uterus |
4. | Pregnancies terminated due to the hormonal imbalance |
Choose the wrong statement:
1. | Penicillium is multicellular and produces antibiotics. |
2. | Neurospora is used in the study of biochemical genetics. |
3. | Morels and truffles are poisonous mushrooms. |
4. | Yeast is unicellular and useful in fermentation. |
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