IGCSE Biology Paper-2: Specimen Questions with Answers 141 - 143 of 203

Question 141

Question

MCQ▾

A man who was blood group A and a woman who was blood group B had four children, each with a different blood group A, B, AB and O.

Which type of genotype would be expected?

Choices

Choice (4)

a.

b.

c.

d.

None of the above

Answer

b.

Explanation

Type of Genotype Would be Expected
i
blood group AB

blood group B

iblood group A

iiblood group O
Type of Genotype Would be Expected

Question 142

Question

MCQ▾

The graph shows world wheat production from 1960 to 2010.

The Graph Shows World Wheat Production from 1960 to 2010

What has contributed to the changes shown in wheat production?

Choices

Choice (4)

a.

Using Insecticides

b.

Using Only Herbicides

c.

Using Less Amount of Fertilizer

d.

Using Selective Breeding Method

Answer

d.

Explanation

Advantages of Selective Breeding

  • It requires no company patent.
  • It allows for higher profit.
  • It can create new varieties of good crops.
  • It does not have any issue of safety.
  • It helps eliminate diseases.
  • It influences the production of food coming from plants in a positive way.

All the above factors lead to explosive increase of cereals production worldwide.

Question 143

Question

MCQ▾

What is the name of the organ in which a human fetus grows until it is born?

Choices

Choice (4)

a.

Ovary

b.

Uterus

c.

Bladder

d.

Urethra

Answer

b.

Explanation

  • The Foetus and embryo develop within the uterus, an organ that sits within the pelvis of the mother. The process the mother experiences whilst carrying the Foetus or embryo is referred to as pregnancy.
  • The placenta connects the developing Foetus to the uterine wall to allow nutrient uptake, thermo-regulation, waste elimination, and gas exchange via the mother՚s blood supply; to fight against internal infection; and to produce hormones, which support pregnancy.
  • The placenta provides oxygen and nutrients to growing fetuses and removes waste products from the fetus՚s blood. The placenta attaches to the wall of the uterus, and the fetus՚s umbilical cord develops from the placenta.
Foetus and Embryo Develop

Developed by: