An increase in the concentration of the toxicant at successive trophic levels is known as:

1. Biomagnifications

2. Biodeterioration

3. Biotransformation

4. Biogeochemical cycling

Body having meshwork of cells, internal cavities lined with food filtering flagellated Cells and indirect development is the characteristics of phylum?

1. Coelenterata

2. Porifera

3. Mollusca

4. Protozoa

The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements are involved in this reaction?

1. Manganese and chlorine

2. Manganese and potassium

3. Magnesium and molybdenum

4. Magnesium and chlorine

The primary dentition in humans differs from permanent dentition in not having one of the following types of teeth:

1. Canine

2. Premolars

3. Molars

4. Incisors

Coconut water from a tender coconut is?

1. Immature embryo

2. Free nuclear endosperm

3. Innermost layers of the seed coat

4. Degenerated nucellus

Which of the following layers in an antral follicle is acellular?

1. Granulosa

2. Theca interna

3. Stroma

4. Zona pellucida

The introduction of t-DNA into plants involves?

1. Infection of the plant by Agrobacterium tumefaciens

2. Altering the pH of the soil, heat-shocking the plants

3. Exposing the plants to Cold for a brief period

4. Allowing the plant roots to stand in water

In which group of organisms the Cell walls form two thin overlapping shells which fit together?

Human urine is usually acidic because?
 

In photosynthesis, the light-independent reactions take place at?

1. Thylakoid lumen

2. photosystem I

3. photosystem II

4. Stromal matrix