IGCSE Biology Paper-4: Specimen Questions with Answers 33 - 38 of 279

Glide to success with Doorsteptutor material for Bank-PO : get questions, notes, tests, video lectures and more- for all subjects of Bank-PO.

Question 33

Edit

Write in Brief

One Liner▾

Describe how deforestation can cause soil erosion?

Explanation

Removal of forests is called as deforestation. The loss of trees, which anchor the soil particles with their roots, causes widespread erosion throughout the tropics and the land become bare.

Question 34

Edit

Write in Brief

One Liner▾

Discuss the advantages and disadvantages of breast-feeding compared with bottle-feeding using formula milk.

Explanation

Advantages of breast feeding:

Table Shows Advantages of Breast-Feeding

Disadvantages of breast feeding:

Image Shows Disadvantages of Breast-Feeding

Passage

The figure shows a food web of grassland ecosystem.

The Figure Shows a Food Web of Grassland Ecosystem

Question 35 (1 of 3 Based on Passage)

Edit

Write in Brief

One Liner▾

How many predators are involved in given food web

Explanation

Three . Predators eat other animals. In given food web Fox, Vole and thrush are the predator.

Question 36 (2 of 3 Based on Passage)

Edit

Write in Brief

One Liner▾

Give the example of primary producer in above figure

Explanation

Grass

Question 37 (3 of 3 Based on Passage)

Edit

Write in Brief

One Liner▾

What will happen when the population of thrush decrease (In respect to population of slug)

Explanation

When the numbers of thrushes decreases , the number of slugs will enhance because slugs would have fewer predators.

Question 38

Edit

Write in Brief

One Liner▾

What will be the result when a cross between a heterozygous tall pea plant and a dwarf plant occur?

Explanation

It shows how a single gene is passed on from parents to next generation.

A heterozygous tall pea plant will be Tt and Dwarf pea plant will be tt. In addition, its ratio will be 1: 1

In Cross between Aheterozygous Tall Pea Plant and a Dwarf Plant

Developed by: