A test cross is carried out to:
1.
Predict whether two traits are linked
2.
Assess the number of alleles of a gene
3.
Determine whether two species or varieties will breed successfully
4.
Determine the genotype of a plant at F2
Which one of the following categories of animals, is correctly described with no single exception in it?
| 1. | All bony fishes have four pairs of gills and an operculum on each side |
| 2. | All sponges are marine and have collared cells |
| 3. | All mammals are viviparous and possess a diaphragm for breathing |
| 4. | All reptiles possess scales, have a three-chambered heart, and are cold blood (poikilothermal) |
The rate of formation of new organic matter by rabbits in grassland is called:
1. Secondary productivity
2. Net primary productivity
3. Gross primary productivity
4. Net productivity
In genetic engineering, the antibiotic-resistance gene is used:
1. To select healthy vectors
2. As sequences from where replication starts
3. To keep the cultures free of infection
4. As selectable markers
The secretory phase in the human menstrual cycle is also called:
| 1. | Follicular phase lasting for about 6 days |
| 2. | Luteal phase and lasts for about 13 days |
| 3. | Follicular phase and lasts for about 13 days |
| 4. | Luteal phase and lasts for about 6 days |
Through their effect on plant growth regulators, what do the temperature and light control in the plants?
1. Flowering
2. Closure of stomata
3. Fruit elongation
4. Apical dominance
Which one of the following human organs is often called the "graveyard" of RBCs?
1. Kidney
2. Spleen
3. Liver
4. Gall bladder
Which one of the following pairs of animals is similar to each other pertaining to the feature stated against them?
| 1. | Garden lizard and Crocodile - Three-chambered heart |
| 2. | Ascaris and Ancylostoma - Metameric segmentation |
| 3. | Sea horse and Flying fish - Cold-blooded (poikilothermal) |
| 4. | Pteropus and Ornithorhyncus - Viviparity |
The idea of mutations was brought forth by:
| 1. | Gregor Mendel, who worked on Pisum sativum |
| 2. | Hardy Weinberg, who worked on allele frequencies in a population |
| 3. | Charles Darwin, who observed a wide variety of organisms during sea voyages |
| 4. | Hugo do Vries, who worked on evening primrose |
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