651. In animals like Annelids, Molluscs, organs have associated to form functional systems, each system concerned with a specific physiological function. This pattern is called ________ system level of organization.

1. Organ
2. Open
3. Closed
4. Coelom

Option “1” is correct.
In animals like Annelids, Molluscs, organs have associated to form functional systems, each system concerned with a specific physiological function. This pattern is called organ system level of organization.
652. A healthy adult man has, on an average, ________ (in millions) of RBCs mm3 of blood.

1. 4.5 – 5.9
2. 4 – 4.5
3. 3 – 3.5
4. 6 – 6.5

Option “1” is correct.
An RBC count is measured in millions per cubic millimeter (million/mm3). A healthy adult man has , on an average, 4.5-5.9(in millions) of RBCs in mm3 of blood.
653. The female sex organ in a flower is the __________.

1. Zoospores
2. Stamen
3. Pistil
4. Chlorophyceae

Option “3” is correct.
Pistil, the female reproductive part of a flower. The pistil, centrally located, typically consists of a swollen base, the ovary, which contains the potential seeds, or ovules; a stalk, or style, arising from the ovary; and a pollen-receptive tip, the stigma, variously shaped and often sticky.
654. Which endocrine gland is found in chest cavity?

1. Pineal gland
2. Thymus gland
3. Adrenal gland
4. Thyroid gland

Option “2” is correct.
The endocrine glands are widely distributed throughout the body. The pituitary gland, pineal gland and hypothalamus are located in the skull. The thyroid and parathyroid glands are in the neck, and the thymus gland is in the thoracic (chest) cavity.
655. Blue Revolution is related to:

1. Space research
2. Poultry
3. Drinking water
4. Fisheries

Option “4” is correct.
Blue Revolution means the adoption of a package programme to increase the production of fish and marine products.
656. BOD stands for:

1. Biological oxidation demand
2. Biological oxygen decomposition
3. Bio oxygen demand
4. Biotic oxidation demand

Option “1” is correct.
BOD stands for Biological Oxygen Demand. It is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.
657. Minamata disease is caused by pollution of water by:

1. Lead
2. Tin
3. Methyl Isocyanate
4. Mercury

Option “4” is correct.
Minamata disease is a neurological syndrome caused by severe mercury poisoning.
658. Which one of the following is not a part of small intestine?

1. Caecum
2. Duodenum
3. Jejunum
4. Ileum

Option “1” is correct.
The small intestine consists of three parts. The first part, called the duodenum, connects to the stomach. The middle part is the jejunum. The third part, called the ileum, attaches to the colon.
659. Cell or tissue death within a living body is called as –

1. Neutrophils
2. Nephrosis
3. Necrosis
4. Neoplasia

Option “3” is correct.
Necrosis is the death of most or all of the cells in an organ or tissue due to disease, injury, or failure of the blood supply.
660. Which of the following blood cells is compulsory for blood coagulation?

1. Platelets
2. Red blood corpuscles
3. White blood corpuscles
4. Lymphocytes

Option “1” is correct.
Platelets are tiny cell fragments that are found within our blood. Whenever there is a cut the activated platelets continue to arrive on the scene through the bloodstream. They stick together and become caught in the web of fibrin. Platelets are compulsory for blood coagulation.
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