Tag: zoology

Quizzes (289) Questions (5869)

Questions Related to zoology

Multiple choice zoology our health non-infectious diseases non infectious diseases categories of diseases

Which of the following are considered as risk factors which leads to non-communicable disease?

  1. Over sleeping

  2. Weakness

  3. Unhealthy diet

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Non-communicable diseases (like heart disease or diabetes) are strongly linked to lifestyle factors. An unhealthy diet is a primary risk factor for these conditions.

Multiple choice zoology our health non-infectious diseases non infectious diseases categories of diseases

In human beings, retrovirus is considered as a cause of cancer because

  1. Their genome contains oncogene

  2. Their hereditary material made up of single stranded RNA.

  3. They have a gene for reverse transcriptase.

  4. Their genome may contain proto-oncogene
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A retrovirus has been identified as a single-stranded positive sense RNA virus which has an intermediate DNA that helps it target the host cell as an obligate parasite. This virus reverses the usual pattern and uses its transcriptase enzyme to produce DNA. The transmission of these viruses been generally cell-to-cell. In human beings, cancer can be triggered by proto-oncogenes present in the retrovirus which are mistakenly incorporated into proviral DNA or by the disruption of the cellular proto-oncogenes

Multiple choice zoology health and diseases non-infectious diseases non infectious diseases categories of diseases

Cancer is a disorder of cell growth in a part of the body

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Cancer is a class of diseases characterized by out-of-control cell growth. There are over 100 different types of cancer, and each is classified by the type of cell that is initially affected.
  • Cancer harms the body when damaged cells divide uncontrollably to form lumps or masses of tissue called tumors. Tumors can grow and interfere with the digestive, nervous, and circulatory systems, and they can release hormones that alter body function. Tumors that stay in one spot and demonstrate limited growth are generally considered to be benign.
So, the correct option is 'True'

Multiple choice zoology health and diseases non-infectious diseases non infectious diseases categories of diseases

Transformation of $C$. one into oncogene is known as?

  1. Carcinogen

  2. Oncogenic transformation

  3. Neoplastic cell

  4. Cancer cell
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Transformation of C.one into oncogene is known as carcinogen. A carcinogen is any substance, radionuclide or radiation that promotes carcinogenesis, the formation of cancer. This may be due to the ability to damage the genome or to the disruption of cellular metabolic processes. 
So the correct option is 'Carcinogen'.
Multiple choice zoology meaning of life level of biological organization in animals introduction to tissues basics of ecology

Basic unit of ecological hierarchy is

  1. Ecosystem

  2. Biological community

  3. Population

  4. Individual
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The basic unit of ecological hierarchy is individual because a community starts building from an individual which grows onto form an entire ecosystem. 

It cannot be Ecosystem as that is one of the largest unit in hierarchy. Many biological communities together form an ecosystem and many individuals in a given space form a population. The ecological hierarchy goes like this: individual---> population---> community ----> ecosystem ----> biome ---> biosphere. So the correct answer is 'Individual'. 

Multiple choice zoology meaning of life level of biological organization in animals introduction to tissues basics of ecology

The habitable part of the earth is called

  1. Soil

  2. Lithosphere

  3. Biosphere

  4. Biome
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The biosphere is made up of the parts of Earth where life exists, but there is uneven distribution of living organisms in the biosphere. The biosphere extends from the deepest root systems of trees, to the dark environment of ocean trenches, to lush rain forests and high mountains.
Scientists describe the Earth in terms of spheres - Lithosphere, Atmosphere, Hydrosphere. Since life exists on the ground, in the air, and in the water, biosphere overlaps all these spheres. Biosphere has existed for about 3.5 billion years.

Multiple choice zoology meaning of life level of biological organization in animals introduction to tissues basics of ecology

Amoeba, Hydra, Jellyfish, plants and animals; all are living things so by definition they are

  1. Organisms

  2. Tissues

  3. Organelles

  4. Organs
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A.An organism is an individual living thing. It can be as simple as a single-celled Amoeba or it can be as complex as a human being.
B.A tissue is a collection of structurally similar cells acting together to perform a specific function.
C.An organelle is a small constituent of a cell that has a specific function. For example, mitochondria (called as powerhouse of the cell) aids in generating energy for cell functions.
D.An organ is a group of tissues that performs a specific function. For example, stomach and kidney are organs. 

So, the correct option is 'organism'.

Multiple choice zoology meaning of life level of biological organization in animals introduction to tissues basics of ecology

All the living organisms and non-living factors of the Earth constitute

  1. Biosphere

  2. Community

  3. Biome

  4. Association
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The biosphere is a global ecosystem composed of living organisms (biotic) and the nonliving (abiotic) factors from which they derive energy and nutrients. It is a relatively thin life-supporting stratum of Earth's surface, extending from a few kilometres into the atmosphere to the deep-sea vents of the ocean. 

Biomes are very large ecological areas on the Earth's surface, with fauna and flora (animals and plants) adapting to their environment. 
A community is a collection of species populations.

Multiple choice zoology meaning of life level of biological organization in animals introduction to tissues basics of ecology

Another term for ecosystem is  

  1. Community

  2. Population

  3. Biosphere

  4. Biome

  5. Trophic level
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

All the biotic and the abiotic components together form biosphere or ecosystem. A biosphere is composed of all living organisms and nonliving things. The population is the number of individuals in a given area. Biome includes all flora and fauna. A trophic level is defined as the position of an individual in the food chain. So, the correct answer is option C.

Multiple choice zoology meaning of life level of biological organization in animals introduction to tissues basics of ecology

Which of the following includes all living organisms and all life-supporting regions of the Earth?

  1. Biosphere

  2. Ionosphere

  3. Stratosphere

  4. Lithosphere
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The biosphere is the biological component of earth systems, which also include the lithosphere, hydrosphere, atmosphere, etc. The biosphere includes all living organisms on earth, together with the dead organic matter produced by them. 

Thus, the correct answer is option A.