CIE Biology Paper-4: Specimen Questions 117 - 119 of 120

Question number: 117

Essay Question▾

Describe in Detail

Figure shows different levels of organization. Arrange them in a proper way.

Image shows different levels of organization

Image shows different levels of organization

Image shows different levels of organization in unarranged way

Explanation

The first level of organization will be glucose molecule, after this the second level will be cell, third one is tissue, after tissue the next level of organization will be organ and finally last one is organism.

Image shows different levels of organization - Completed

Image shows different levels of organization - Completed

Image shows different levels of organization in arranged manner.

Question number: 118

Essay Question▾

Describe in Detail

Figure shows two different type of plants - Plant A and plant B. What is the similarity and dissimilarity in both plants?

Image shows two kind of plants

Image shows two kind of plants

Figure shows two different type of plants. Plant A and plant B. Identify similarity and dissimilarity in both plants.

Explanation

In both plants stem transport water and other nutrients from the root to the leaves and it also transfer food from the leaves to all the parts of plant. The main difference in given plant A and B is related to weak stem and strong stem. Plant A have weak and plant B has strong stem.

Passage

Carbon dioxide is important greenhouse gases. The effect of human activities in increasing the concentration of greenhouse gases, such as carbon dioxide and methane, is known as the enhanced greenhouse effect.

Question number: 119 (1 of 2 Based on Passage) Show Passage

Essay Question▾

Describe in Detail

What is the role of methane as a source of greenhouse gas?

Explanation

Methane is the second most important greenhouse gas after carbon di oxide. Its effect is 20 times more than carbon di oxide, but there is low amount of methane is present in atmosphere. It contribute about 25 % of total global warming. Cows and termites generate methane gas. Rice growing produces methane. Anaerobic bacteria living in swamps and garbage dumps also produce methane. Coal mining and oil wells produce methane. The amount of methane in the atmosphere has increased only slowly since 2000 although methane continues to enter the atmosphere at the same rate.

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