Polycythemia is an abnormally high concentration of hemoglobin in the blood through an increase in red cell numbers. People with this condition have thicker blood, which makes it harder for blood to circulate around the body. A relatively stable number of RBCs is maintained in the circulation by increasing or decreasing the rate of production by the bone marrow.

Correct Option: C

Polycythemia is an abnormally high concentration of hemoglobin in the blood through an increase in red cell numbers. People with this condition have thicker blood, which makes it harder for blood to circulate around the body. A relatively stable number of RBCs is maintained in the circulation by increasing or decreasing the rate of production by the bone marrow.

Vitamin K is a necessary participant in synthesis of several proteins that mediate both coagulation and anticoagulation. It is noteworthy for the synthesis of Prothrombin (coagulation factor II) that forms thrombin in the clotting process. Vitamin K is integrally involved in the clotting mechanism of blood.

Correct Option: D

Vitamin K is a necessary participant in synthesis of several proteins that mediate both coagulation and anticoagulation. It is noteworthy for the synthesis of Prothrombin (coagulation factor II) that forms thrombin in the clotting process. Vitamin K is integrally involved in the clotting mechanism of blood.

Both male and female mosquitoes eat the same things—nectar, plant sap, or honeydew (a sticky substance excreted by aphids)—for energy. But only female mosquitoes imbibe a blood meal. The females need the protein in blood platelets to develop eggs. Male mosquitoes don’t have specific mouthparts to pierce skin and access blood vessels.

Correct Option: C

Both male and female mosquitoes eat the same things—nectar, plant sap, or honeydew (a sticky substance excreted by aphids)—for energy. But only female mosquitoes imbibe a blood meal. The females need the protein in blood platelets to develop eggs. Male mosquitoes don’t have specific mouthparts to pierce skin and access blood vessels.

The best way to manage non-biodegradeble wastes such as plastics, metals and electronics is Reduce, Reuse and Recycle. The waste product can be recycled to make it usable again without posing serious challenges to the environment. Recycling is by far the most environmentally friendly option that one can choose.

Correct Option: D

The best way to manage non-biodegradeble wastes such as plastics, metals and electronics is Reduce, Reuse and Recycle. The waste product can be recycled to make it usable again without posing serious challenges to the environment. Recycling is by far the most environmentally friendly option that one can choose.

Ecotone regions (transitional zones) like mangroves, wetlands, estuaries, grasslands etc. have far greater productivity compared to natural ecosystems like forest ecosystem, ocean ecosystem, pond ecosystem, riverine ecosystem, desert ecosystem etc. This is because of the wide-ranging species from the adjacent ecosystems being present in the ecotone. Also, an estuary has very little wave action, so it provides a calm refuge from the open sea and hence becomes ideal for the survival of numerous aquatic species. Estuaries are most heavily populated areas throughout the world, with about 60% of the world’s population living along estuaries and the coast.

Correct Option: C

Ecotone regions (transitional zones) like mangroves, wetlands, estuaries, grasslands etc. have far greater productivity compared to natural ecosystems like forest ecosystem, ocean ecosystem, pond ecosystem, riverine ecosystem, desert ecosystem etc. This is because of the wide-ranging species from the adjacent ecosystems being present in the ecotone. Also, an estuary has very little wave action, so it provides a calm refuge from the open sea and hence becomes ideal for the survival of numerous aquatic species. Estuaries are most heavily populated areas throughout the world, with about 60% of the world’s population living along estuaries and the coast.