Tag: a study on animals

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Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Reptile and bird eggs are

  1. Macrolecithal

  2. Oligolecithal

  3. Mesolecithal

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

Reptiles and birds are terrestrial animals. They lay large yolk-rich eggs which are covered with a porous shell. As the eggs are rich in yolk they can support the development of an embryo. Hence, embryogenesis occurs outside the body of the animal inside the egg. Such yolk-rich eggs are called as macrolecithal eggs.

So, the correct answer is option A.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Microlecithal eggs are found in

  1. Reptilia and Aves

  2. Amphibia, Aves and Reptilia

  3. Reptilia, Aves and Chiroptera

  4. Eutheria
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Eutheria includes the placental mammals. Placental mammals are characterized by the development of a placenta. The egg of these animals has very little (microlecithal eggs) or no yolk. The egg of reptiles and birds is rich in the yolk. The placenta in eutherians forms from both embryonic membranes and the maternal uterine wall. The blood vessels of the embryo come very close to the blood vessels of the mother, so materials can be exchanged by diffusion. The placenta allows the young to remain within the mother's body until embryonic development is complete. 
So, the correct answer is option D.
Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Yolk is composed of

  1. Carbohydrate

  2. Protein

  3. Phospholipid

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

The yolk is a part of an egg, that feeds the developing embryo in animals. It is composed of carbohydrates (3.5%), protein (16%) and fats (phospholipids 26.5%) of total yolk. The main fatty acids present in the yolk is oleic acid, linoleic acid, palmitic acid etc. 

Phosvitins and Lipovitellins are the major proteins present in the yolk. Apart from that yolk is also composed of vitamins - A, D, E, and K. 
So, the correct answer is option D.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Yolk is synthesized in

  1. Liver

  2. Fat bodies

  3. Both A and B

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

The process of formation of the yolk is known as vitellogenesis. These are generally used to nourish the developing embryo in oviparous animals. They are deposited during oocyte maturation for use after fertilization and are synthesized in the liver or fat bodies as a common precursor termed vitellogenin.

So, the correct answer is option C.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Yolk cytoplasm contains

  1. Ooplasm

  2. Protoplasm

  3. Deutoplasm

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

  • Deutoplasm is the nutritive material present in the egg for development and nourishment of embryo. It is a non-living portion of the egg.
  • Deutoplam is present in the yolk of eggs. Sometimes yolk and deutoplasm are used synonymously.
So, the correct option is 'Deutoplasm'.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Animals which give birth to young ones are called as

  1. Amphibious

  2. Oviparous

  3. Triploblastic

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

Amphibious are the animals that can live on water as well as on land.
Oviparous are the animals that lay eggs.
Triploblastic describes the animal having a body composed of three embryonic cell layers as the ectoderm, mesoderm, and endoderm.
Viviparous are animals that give birth to live young one that has developed inside the body of the parent.

So, the correct answer is option D.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Egg-producing animals such as birds are called as

  1. Unisexual

  2. Oviparous

  3. Viviparous

  4. Hermaphrodite
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Unisexual is where the organism is either male or female.
Oviparous animals are those that lay eggs, with little or no other embryonic development within the mother.
Viviparous are animals that give birth to live young ones.
Hermaphrodite is the one which has both male and female reproductive organs.
So, the correct answer is option B.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Which of the following animals are correctly categorised ?

Oviparous Viviparous
A. Human,cow  Snake, Pigeon
B. Hen, Snake Human, Crocodile
C. Pigeon, Crocodile  Rat, Horse
D. Toad, Earthworm Cockroach, Cat

  1. A

  2. B

  3. C

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

Oviparous are the animals that lay eggs and the embryonic development majorly takes place outside the body of the mother. From the options, pigeon and crocodile lay eggs.
Viviparous are the animals that give birth to live young ones that have developed inside the body of the female parent, Of the given options, rat and horse are viviparous.
So, the correct answer is option C.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

Egg laying animals are known as

  1. Viviparous

  2. Oviparous

  3. Sterile

  4. Hermaphrodite
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Oviparous animals lay an egg and the embryonic development takes place outside the human body. Example birds.
While viviparous animals are those that give birth to live young ones. Example human beings.

The sterile organisms are those which are not able to reproduce. Example- living organism suffering from injury after exposure to harmful radiation.
Hermaphrodite is the organism which has reproductive organs of both the sexes. Example earthworm.
So, the correct answer is option B.

Multiple choice biology the life cycle of animals types of reproduction in animals oviparous and viviparous a study on animals

The development of embryo inside an egg is called as

  1. Vivipary

  2. Carnivorous

  3. Omnivorous

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

Vivipary is the development of the embryo inside the body of the mother, eventually leading to live birth.
Carnivorous are animals that feed on animal tissues.
Omnivorous are animals that feed on plant and animals.
Ovipary is the method of reproduction in which eggs are laid and embryos develop outside the mother's body, each egg eventually hatching into a young animal.
So, the correct answer is option D.