Explanation

The MN blood group system shows co-dominance, where both M and N alleles are equally expressed in the phenotype.

Individuals can have M, N, or MN blood types, with MN expressing both traits simultaneously.

Explanation

Taq polymerase is an enzyme obtained from the thermophilic bacterium Thermus aquaticus.

It is heat-stable and essential for PCR, where it replicates DNA at high temperatures.

Explanation

Archaebacteria, especially thermophiles, can survive extreme conditions, tolerating temperatures up to 120°C.

They are often found in hot springs, hydrothermal vents, and other extreme environments.

Explanation

Charles Elton defined a species' niche as its occupation — the role it plays in its environment.

It includes how the species obtains food, interacts with other organisms, and its place in the ecosystem structure.

Explanation

The Tundra ecosystem in Pakistan is found in the high-altitude regions of the Karakoram and Hindukush Mountains.

This ecosystem is characterized by cold climate, permafrost, and low vegetation like mosses and lichens.

Explanation

Afforestation is the process of planting trees in an area where there were no previous forests.

It helps in combating climate change, preventing soil erosion, and improving biodiversity.

Explanation

Acetyl Co-A is the first carbon compound that enters the Krebs cycle, combining with oxaloacetate to form citrate.

It is produced from pyruvate during the link reaction before entering the cycle.

Explanation

Oxidative phosphorylation is the process of ATP synthesis using energy from electrons transferred through the electron transport chain in the presence of oxygen.

It occurs in the mitochondria.

It is the main source of ATP in aerobic respiration.

Explanation

Choanocytes, also called collar cells, are flagellated cells found in parazoans (sponges).

They help in capturing food particles and aiding digestion by creating a water current.

Explanation

Inflorescence refers to the arrangement or pattern of flowers on the floral axis or stem.

It can be simple or compound, with types like raceme, panicle, or capitulum.