Reproduction in Animals quiz

The male gametes in animals are called:

The fusion of a sperm and an egg is called:

Which of the following animals shows external fertilisation?

Hydra reproduces asexually by:

Which of the following is a viviparous animal?

In humans, the embryo gets implanted in the wall of the:

The first animal to be cloned from an adult cell was:

The stage of the embryo in which all body parts can be identified is called the:

The larva of a frog is called a:

Amoeba reproduces by:

Name the male and female reproductive organs in humans that produce gametes. (2 marks)

What is a zygote? What happens to it after it is formed? (2 marks)

Why do frogs lay their eggs in water? (2 marks)

Why is the sperm able to move towards the egg? (2 marks)

Explain the difference between an embryo and a foetus. (2 marks)

Why is the hen called an oviparous animal even though fertilisation in hens is internal? (2 marks)

Name the stages of metamorphosis in a silkworm. (2 marks)

Why does a newly hatched chick look like the adult hen, but a tadpole does not look like a frog? (2 marks)

What is a bud in Hydra? How does it become a new Hydra? (2 marks)

Why is reproduction essential for living organisms? (2 marks)

A Hydra produces one bud every 2 days, and each bud separates and starts budding in the same way after 2 days. Starting with one Hydra, how many Hydras will there be after 8 days, assuming none die? (3 marks)

A fish lays 10,000 eggs, of which 2% are fertilised and only 10% of the fertilised eggs survive to become adult fish. How many adult fish result? What does this show about external fertilisation? (3 marks)

The average pregnancy (gestation) in humans lasts about 280 days. Express this in weeks and in months, taking a month as 30 days, correct to one decimal place. (3 marks)

Dolly the sheep was born on 5 July 1996 and died on 14 February 2003. Calculate her age at death in years and months. Sheep of her breed usually live about 11 to 12 years; compare her lifespan with this. (3 marks)

A silkworm moth lays about 400 eggs. The larvae feed on mulberry leaves for about 25 days before forming cocoons, and the pupal stage lasts about 10 days. Find the total number of days from the start of the larval stage to the emergence of the adult moth, and the number of cocoons expected if 90% of the eggs develop. (3 marks)

Read the passage and answer the questions. During a rainy season, students saw clumps of eggs surrounded by jelly floating in a pond. After a week, tiny tadpoles with tails were swimming in the water, and after some weeks small frogs with legs and no tails hopped out. (i) Why are the eggs surrounded by jelly? (ii) Name the type of fertilisation in frogs. (iii) What is this transformation from tadpole to adult frog called? (5 marks)

Read the passage and answer the questions. A student observed Hydra under a microscope and saw a small outgrowth on its body. After a few days, the outgrowth developed tentacles and separated from the parent. (i) What is the outgrowth called? (ii) Name the type of reproduction shown. (iii) Why will the new Hydra be identical to its parent? (5 marks)

Read the passage and answer the questions. In 1996, scientists at the Roslin Institute in Scotland took the nucleus from a mammary gland cell of one sheep and put it into an egg cell, from which the nucleus had been removed, of another sheep. The egg was placed in the uterus of a third sheep, which gave birth to Dolly. (i) What is cloning? (ii) Whom did Dolly resemble, and why? (iii) Name the scientist who led this work. (5 marks)

Read the passage and answer the questions. A couple could not have a baby because the wife's oviducts were blocked. Doctors collected eggs and sperms, allowed fertilisation to take place outside the body and placed the early embryo in the mother's uterus. A healthy baby was born nine months later. (i) Why could the couple not have a baby naturally? (ii) Name this technique. (iii) Why are such babies wrongly called "test-tube babies"? (5 marks)

Read the passage and answer the questions. A poultry farmer keeps fertilised hen's eggs in an incubator at a warm temperature. After about three weeks, chicks break open the shells and come out. (i) Where does fertilisation take place in a hen? (ii) Why does the egg need a hard shell? (iii) Why must the eggs be kept warm? (5 marks)

Draw labelled diagrams of the male and female reproductive systems in humans. Explain the function of each organ and describe how fertilisation takes place. (6 marks)

Draw a flowchart showing the development of a human baby from a zygote to a foetus. Explain implantation, the formation of the embryo, and why the foetus develops inside the uterus. (6 marks)

Draw a labelled diagram of the life cycle of a frog. Compare the life cycle of a frog with the development of a chick, and explain why fertilisation is external in frogs and internal in hens. (6 marks)

Draw labelled diagrams showing budding in Hydra and binary fission in Amoeba. Explain both methods of asexual reproduction and compare asexual and sexual reproduction in four points. (6 marks)

Draw a flowchart showing the steps involved in the cloning of Dolly the sheep. Explain each step, discuss two possible benefits of cloning and two concerns about it. (6 marks)