Tag: biology

Questions Related to biology

Secondary sexual character is

biology life processes in living organisms- part 2 earthworm - reproductive system reproduction in earthworm introduction to reproduction

  1. Testis

  2. Ovary

  3. Beard

  4. Vas deferens

Show answer
Correct Option: C
Explanation:

  • Secondary sexual characters are those that appear at the time of puberty while the primary sexual characters are present from the time of birth. 
  • These secondary sexual characters are caused by hormones released at the time of puberty.
  • Beard growth starts in the male at the time of puberty in the male because of increased secretion of testosterone.
So, the correct option is 'Beard'.

Fertilization is internal in 

biology life processes in living organisms- part 2 earthworm - reproductive system reproduction in earthworm introduction to reproduction

  1. Toads

  2. Frogs

  3. Dogfish

  4. Catfish

Show answer
Correct Option: C
Explanation:

Fertilization can be internal or external. When the fertilization occurs inside the female body, then it is internal fertilization (e.g., most reptiles, some birds, some fishes.)
Fertilization in dogfish, shark is internal. While in catfish, toads and some frogs, it is external fertilization.
Hence, the correct answer is option (C).

The mammal whose testis come into scrotal sacs only during breeding time is

biology life processes in living organisms- part 2 earthworm - reproductive system reproduction in earthworm introduction to reproduction

  1. Whale

  2. Bat

  3. Cat

  4. Tiger

Show answer
Correct Option: B
Explanation:

Testes are the organs that produce the germ cells and scrotum is the pouch that contains the testes. The evolution of the scrotal sacs in mammals has been mysterious and there exist many hypotheses to explain the probable function of the scrotum. Primarily they provide a space, that isolate and serves to provide a temperature, lower than the body; essential for the production, maturation, and storage of sperm cells. Bats in this respect are unique and exhibit testicular migration between abdomen and scrotum, while the cauda epididymis is permanently in the scrotal sacs.

Man is an example of ................... animal.

biology food: where does it come from? food of animals animal and their eating habit classification of animals on the basis of food

  1. Herbivorous

  2. Carnivorous

  3. Autotrophic

  4. Omnivorous

Show answer
Correct Option: D
Explanation:

Man is an example of omnivorous animal because Omni means all and vore means eater. An organism which can feed on the plant, as well as the meat of the animal, are called omnivorous.

Man consumes plants (fruit vegetables) and also eat the meat of animals like goat, chicken etc thus man considered as the Omnivorous animal.
So the correct answer is "Omnivorous".

Humans are classified as

biology food: where does it come from? food of animals animal and their eating habit classification of animals on the basis of food

  1. Manure

  2. Carnivores

  3. Herbivores

  4. Omnivores

Show answer
Correct Option: D

Which of the following is omnivorous?

biology food: where does it come from? food of animals animal and their eating habit classification of animals on the basis of food

  1. Cow

  2. Grasshopper

  3. Worm

  4. Sparrow

Show answer
Correct Option: C,D
Explanation:

Omnivorous is an animal or person that eats a variety of food both plant and animal origin.

A. Cow is herbivorous as it eats only plants.
B. Grasshopper is herbivorous.
C. Worm is omnivorous.
D. Sparrow are omnivorous birds that mainly eat seeds and substitute their diets with berries, fruits and small insects.
So, the correct answer is 'Worm and sparrow'.

Carnivores are the part of 

biology sources of food food of animals animal and their eating habit classification of animals on the basis of food

  1. First trophic level

  2. Second trophic level

  3. Third trophic level

  4. Both A and B

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Correct Option: C
Explanation:

The first torphic level contains the producers which are plants.

The second trophic level contains the primary consumers that are herbivores which can directly eat olantd.
They third trophic level constitutes secondary consumers or Carnivores which are predators and eat other small animals for nutrition.
So the correct answer is 'Third trophic level's.

Herbivores are also known as producers

biology sources of food food of animals animal and their eating habit classification of animals on the basis of food

  1. True

  2. False

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Correct Option: B
Explanation:

Herbivores depend on plants for their nutrition and are hence known as primary consumers and they cannot synthesize their own food.

Plants are producers as they can synthesize food from extremely basic materials like carbon dioxide, water and sunlight.
Hence the correct answer is 'False'.

Animals consuming only plant materials are referred as

biology sources of food food of animals animal and their eating habit classification of animals on the basis of food

  1. Herbivores

  2. Carnivores

  3. Omnivores

  4. Insectivores

Show answer
Correct Option: A

Ruminants are carnivores.

biology sources of food food of animals animal and their eating habit classification of animals on the basis of food

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Ruminants are exclusively herbivores.

They have their bodies developed in such a way that they can only digest plants or plant based products.
Examples are sheep, cattle, goat, etc.
So the correct answer is 'False'.