Fruit and leaf drop at early stages can be prevented by the application of:

1. Ethylene

2. Auxins

3. Gibberellic acid

4. Cytokinins

Select the correct route for the passage of sperms in male frogs:

In case of a couple where the male is having a very low sperm count, which technique will be suitable for fertilization?

Which ecosystem has the maximum biomass?

1. Grassland ecosystem

2. Pond ecosystem

3. Lake ecosystem

4. Forest ecosystem

Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of:

1. Inspiratory Reserve Volume

2. Tidal Volume

3. Expiratory Reserve Volume

4. Residual Volume

Presence of plants arranged into well-defined vertical layers depending on their height can be seen best in:

1. Tropical Rain Forest

2. Grassland

3. Temperate Forest

4. Tropical Savannah

Which of the following statements is correct?

Alexander Von Humboldt described for the first time:

1. Laws of limiting factor

2. Species-Area relationships

3. Population Growth equations

4. Ecological Biodiversity

Zygotic meiosis is characteristic of?

1. Fucus

2. Funaria

3. Chlamydomonas

4. Marchantia

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?

1. 11

2. 33

3. 333

4. 1