Cambridge IGCSE Biology - 0610 - Core Paper 1 2012 Summer Zone 3

Use the key to identify the fish. The diagram shows a fish with labeled fins: dorsal fin, caudal fin, pectoral fin, pelvic fin, and anal fin.
1. black stripe across the eye ........................................ go to 2
no black stripe across the eye .................................. A
2. black stripe on caudal fin .......................................... go to 3
no black stripe on caudal fin ................................. B
3. black spot below dorsal fin ................................... C
no black spot below dorsal fin ............................... D

The diagram shows a student's drawing of guard cells. Which label is not correct?

A living organism, X, can make its own food, get rid of toxic materials and detect and respond to stimuli. What other four processes must organism X carry out to stay alive?

Which group of organisms has the following features?
• three pairs of jointed legs
• three-part segmented body
• one pair of antennae

The table shows some characteristics of four different vertebrates.
Which vertebrate is a reptile?
[Table_1]

Which diagram shows a plant cell?

Why do some root cells have root hairs?

The diagram shows a liver cell.
Which structure is found in a palisade cell that is not present in this liver cell?

A frog’s skin is permeable to oxygen and carbon dioxide.
When a frog is swimming in pond water, in which directions will oxygen and carbon dioxide diffuse?
[Table_1]

Which statement about cells or tissues, is correct?

Which structures must be present in a cell for osmosis to take place?

Which chemical reaction takes place in the stomach?

A person has bleeding gums. This could be caused by a lack of which nutrient?

Why does chewing food speed up digestion?

Which diagram shows the human double circulatory system?

Which row correctly identifies the chemical elements found in proteins?
[Table_1]

The diagram shows a cell with groups of bacteria around its edge.

The bacteria move to areas of high oxygen concentration.
Which process in the cell causes the bacteria to form these groups?

The table shows the main contents of four meals.
Which meal will be the most effective at preventing constipation?

[Table_1]

Which process depends on energy from respiration?

The diagram shows the human urinary system.

Which substance is not found in the liquid at X in a healthy person?

The diagram shows a section through part of the eye.
X is a circular muscle. What effect does it have when it contracts?

Which set of conditions would make the percentage of water in urine decrease the most?
[Table_1]

What is the equation for anaerobic respiration in yeast?

A natural method of birth control assumes that sperms live for three days after intercourse, ovulation occurs between days 13-15 of the menstrual cycle and released ova live for 36 hours.
On which day of the cycle should intercourse not result in pregnancy?

Read the following sentence.
In order to prevent the human body from losing heat, the arterioles supplying the skin become narrow.
Which process does this sentence describe?

Which statement describes human cells formed by meiosis?

The diagram shows a food chain.
Which organism is the producer?

What special dietary advice should be given to a pregnant woman?

In addition to a suitable temperature, what else is necessary for seed germination?

A short-toed animal was crossed with a long-toed animal of the same species. All the offspring had short toes. One of these offspring was crossed with another long-toed animal of the same species.
Which ratio of short-toed to long-toed animals should be expected?

Which types of variation can be inherited?
[Table_1]

Which diagram shows the flow of energy in an ecosystem?

Which process is an example of development?

The graph shows how oxygen concentration and the number of bacteria change when sewage is added to a river.

What describes the oxygen concentration and the number of bacteria between the point at which sewage is added and point P?

The diagram shows the results of a survey on the types of animals found along a stretch of river near to a factory. Which of the following animals lives in the most polluted water?

During aerobic respiration glucose is broken down. This process recycles

The diagram shows a food web.

Fungi are decomposers. What is their importance in this food web?

On the map shown, sulfur dioxide is produced at X. Which region is most likely to experience acid rain?

What name is given to the diagram below?

In an ecosystem, which are the only organisms to remove carbon dioxide from the atmosphere?