671. Which of the following is a symptom of hemophilia?

1. Night Blindness
2. No clotting of Blood
3. Rickets
4. Loss of hemoglobin

Option “3” is correct.
Hemophilia is a mostly inherited genetic disorder that impairs the body’s ability to make blood clots, a process needed to stop bleeding.
672. The process of pollination by birds is also known as –

1. Hydrophily
2. Entomophily
3. Embryophily
4. Ornithophily

Option “4” is correct.
Ornithophily or bird pollination is the pollination of flowering plants by birds.
673. Sycon (Scypha), Spongilla (Fresh water sponge) and Euspongia (Bath sponge) are examples of which Phylum?

1. Coelenterata
2. Platyhelminthes
3. Ctenophora
4. Porifera

Option “4” is correct.
Sycon (Scypha), Spongilla (Fresh water sponge) and Euspongia (Bath sponge) are examples of Porifera Phylum.
674. A multicellular organism grows by ____________.

1. Cell addition
2. Cell explosion
3. Cell implosion
4. Cell division

Option “4” is correct.
A multicellular organism grows by Cell division.
675. The male sex organ in a flower is the __________.

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

Option “2” is correct.
The male sex organ in a flower is the Stamen.
676. The strongest muscle in human body is found in-

1. Jaws
2. Thighs
3. Neck
4. Hands

Option “1” is correct.
The strongest muscle based on its weight is the masseter. With all muscles of the jaw working together, it can close the teeth with a force as great as 55 pounds (25 kilograms) on the incisors or 200 pounds (90.7 kilograms) on the molars.
677. Which of the following is not a symptom of a heart attack?

1. Chest pain
2. Nausea and sweating
3. Numbness and aching of arms
4. Pain in legs

Option “4” is correct.
A heart attack-medically was known as a myocardial infarction. The symptoms of heart attack include; pain or discomfort in one or both arms, back, neck, jaws or stomach. Shortness of breath with or without chest discomforts other signs such as breaking out in a cold sweat, nausea of lightheadedness. As with men and women’s most common heart attack symptom is chest pain or discomfort.
678. Which of the following is not a symptom of a heart attack?

1. Vitamin A – Night Blindness
2. Vitamin B – Pellagra
3. Vitamin D – Color Blindness
4. Folic Acid – Anemia

Option “3” is correct.
Colour blindness is a sex-linked genetic disorder. It does not relate to vitamin D. The deficiency of Vitamin A causes night blindness. Vitamin B_3 is also called niacin . Its deficiency causes pellagra. The deficiency of folic acid causes anaemia.
679. What would happen if the pancreas is defective?

1. Digestion will not take properly
2. Insulin and glucagon are not formed
3. Blood formation will stop
4. Blood pressure will increase

Option “2” is correct.
The pancreas is a mixed gland which secretes digestive enzyme and the beta cells of islets of Langerhans secrete insulin, alpha cells secrete glucagon, delta cells secrete somatostatin hormone. If the pancreas is defective by any of the reason, then the formation of insulin and glucagon are affected badly.
680. Which one of the following is a plant hormone?

1. Insulin
2. Thyroxine
3. Estrogen
4. Cytokinin

Option “4” is correct.
The plant hormones are generally classified into five groups. These are:
(i) Abscisic acid (ii) Auxins
(iii) Cytokinins (iv) Ethylene
(v) Gibberellins.
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