351. Which component in tobacco makes it harmful for human consumption?

1. Morphine
2. Nicotine
3. Heroin
4. None of these

Option “2” is correct
Tobacco is a product prepared from the leaves of the tobacco plant by curing them. Tobacco contains the alkaloid nicotine, which is a stimulant and make it harmful for human consumption.
352. What is full form of BOD?

1. Biological Oxygen Deficit
2. Biological Oxygen Difference
3. Biological Oxygen Demand
4. Biological Oxygen Distribution

Option “3” is correct
Biochemical oxygen demand (BOD, also called biological oxygen demand) is the amount of dissolved oxygen needed (i.e., demanded) by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.
353. _______ are chlorophyll-bearing, simple, thalloid, autotrophic and largely aquatic (both fresh water and marine) organisms.

1. Pteridophytes
2. Bryophytes
3. Algae
4. Gymnosperms

Option “3” is correct
Algae are chlorophyll-bearing, simple, thalloid, autotrophic and largely acquatic (both fresh water and marine) organisms.
354. Animals like annelids and arthropods etc where the body can be divided into identical left and right halves in only one plane, exhibit ________symmetry.

1. Coelenterata
2. Radial
3. Ctenophora
4. Bilateral

Option “4” is correct
Animals like annelids and arthropods etc. where the body can be divided into identical left and right halves in only one plane, exhibit bilateral symmetry.
355. Sexual reproduction in Algae that takes place through fusion of two similar size gametes is called?

1. Zoospores
2. Anisogamous
3. Isogamous
4. Oogamous

Option “3” is correct
Sexual reproduction in Algae that takes place through fusion of two similar size gametes is called Isogamous.
356. Animals in which the cells are arranged in three embryonic layers are called ________.

1. Diploblastic
2. Ectoderm
3. Tripoblastic
4. Endoderm

Option “3” is correct
Animals in which the cells are arranged in three embryonic layers are called Triploblastic
357. In females, the ovaries are located ______ on each side of the lower abdomen.

1. One
2. Two
3. Three
4. Four

Option “1” is correct
The ovaries are two oval-shaped organs that lie to the upper right and left of the uterus. In other words, the ovaries are located one on each side of the lower abdomen.
358. Which cell disorder in our body is responsible for color blindness?

1. WBC
2. Cone cell
3. Rod Cell
4. Neuron

Option “2” is correct
The retina of the eye has two types of light sensitive cells called rods and cones, both are found in the retina. Rods work in low light conditions to help night vision, but cones work in daylight and are responsible for colour discrimination.
359. The part of brain which controls emotional reactions in our body is –

1. Hypothalamus
2. Cerebrum
3. Meninges
4. Thalamus

Option “1” is correct
The brain’s limbic system controls emotional expression through the hypothalamus, which has control over the body’s emotional responses systems. The hypothalamus is responsible for regulating hunger, thirst, response to pain, levels of pleasure, sexual satisfaction, anger and aggressive behavior, etc.
360. An organism that transmits disease from one individual to another is called –

1. Hybrid
2. Fragment
3. Vector
4. Clone

Option “3” is correct
An organism that transmits a disease agent from an infected to a non-infected animal or plant is known as vector.
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48 thoughts on “Biology”

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