Which one of the following graphs correctly describes disruptive selection? When studying fitness level associated with body size?
D.
Disruptive selection occurs when an environmental change may produce selection pressure that favours two extreme characteristics. Selection acts on the phenotype, physical biochemical and behavioural traits oft he an organism. It indirectly adapts of population to its environment by selecting and maintaining favourable genotypes in their given pool
The taxonomic key is one of the taxonomic tools in the identification and classification of plants and animals. It is used in the preparation of
Monographs
Flora
Both (a) and (b)
None of these
Which one of the following combination is incorrect?
Rio convention → Air pollution
Kyoto protocol → Climate change
Montreal Protocol → Ozone depletion
Ramsar Convention → Wetland conservation
Monoclonal antibodies and polyclonal antibodies are produced by
T-memory cells
NK- cells
Plasma cells of B-lymphocytes
Memory cells of B-lymphocytes
All monerons
Contain DNA and RNA
Demonstrate a long circular strand of DNA, not formed enclosed in a nuclear membrane
Are bacteria
All of the above
Match the following Columns
| Column I | Column II | ||
| A. | Opuntia | 1. | Stem thorns |
| B. | Asparagus | 2. | Phylloclades |
| C. | Citrus | 3. | Cladodes |
| A | B | C |
| 1 | 2 | 3 |
| A | B | C |
| 2 | 3 | 1 |
| A | B | C |
| 3 | 2 | 1 |
| A | B | C |
| 2 | 1 | 3 |
The method of directly injecting a sperm into ovum in assisted reproductive technology is called.
GIFT
ZIFT
ICSI
ET
The appearance of antibiotic-resistant bacteria is an example of
adaptive radiation
transduction
Pre-existing variation
divergent evolution in the population
Munch hypothesis is based on
Translocation of food due to Turgor Pressure (TP) gradient and imbibition force
Translocation of food due to Turgor Pressure (TP) gradient
Translocation of food due to imbition force
None of the above
