No questions found
Which process in plant cells uses chlorophyll?
599
575
547
The table shows the scientific names of four members of the cat family.
[Table_1]
Which statement is correct?
522
523
526
The diagram shows a type of tooth.
Use the key to identify the tooth.
1 the root is divided into two parts ................................................... go to 2
the root is not divided into two parts ..................................... go to 3
2 the height of the crown is greater than the length of the root ............... A
the height of the crown is less than the length of the root .................. B
3 flattened crown .......................................................... C
ridged crown .......................................................... D
532
532
598
The diagram shows a student's drawing of guard cells. Which label is not correct?
532
588
523
The diagrams show a leaf and its internal structure.
What are the levels of organisation of the labelled structures?
586
588
520
The diagram shows an insect as seen using the low power lens of a microscope.
The actual diameter of the circle is 0.3 cm.
What is the approximate size of this insect in millimetres?
584
563
562
The diagram shows part of a section through a leaf.
Which arrow represents the diffusion of oxygen during photosynthesis?
531
504
542
What are the raw materials necessary for photosynthesis?
571
566
560
In plants, which substance contains magnesium ions?
540
518
506
What must be increased in the diet of a person suffering from constipation?
594
502
574
Which chemical reaction takes place in the mouth?
527
597
550
The diagram shows the human alimentary canal, with a string marked in metres beside it.
How long is the small intestine?
592
500
550
What is a description of transpiration?
532
537
532
Which tissue transports water from the roots to the leaves in a plant?
536
552
518
The diagram shows a cross-section through a human blood vessel.
Which type of blood vessel does the diagram show?
569
587
587
Which are both chemical barriers to the transmission of pathogens?
581
572
502
The table shows the approximate composition of inspired and expired air.
[Table_1]
What is the name of gas S?
557
550
512
In an experiment to investigate anaerobic respiration, two bottles are set up in a warm room, as shown .
What would happen to each balloon after one day?
579
591
591
The diagram represents the exchange of gases during breathing and during respiration in the body.
What is represented by X and by Y?
524
520
511
The table shows information about urea.
Which row is correct?
[Table_1]
586
529
537
What is the most important function of sweating?
543
549
594
What shows the order in which these structures are involved in a reflex action?
595
571
522
The diagram shows a person sweating in hot weather.
What part is played by sweat glands during the process of sweating?
503
512
539
The diagram shows the gas exchange surface of a person who has just smoked a cigarette. Substance P can cause cancer.
What is substance P?
568
530
519
Which method of birth control works by preventing an egg from being released?
542
561
586
Which environmental factor is not always a requirement for seed germination?
564
550
560
Four processes involved in labour and birth are shown.
1 cutting the umbilical cord
2 contraction of muscles in the uterus wall
3 dilation of the cervix
4 passage of the baby through the vagina
In which sequence do these events normally occur?
547
574
546
In some mammals the allele for brown coat colour is dominant to the allele for white coat colour.
Which percentage of offspring will be white if a cross is made between two heterozygous mammals?
518
542
501
Which term is defined as a length of DNA that codes for a protein?
541
591
538
What makes tongue rolling an example of discontinuous variation?
553
586
547
What is shown by the widest block in a pyramid of numbers for a grassland ecosystem?
537
539
591
A food chain is shown.
potato plant → slug → hedgehog
By which process is energy transferred from the potato plant to the slug?
596
592
556
A farmer put some fertiliser on his field. Some of the fertiliser drained into a nearby lake.
What is the effect of the fertiliser on the growth of the crop plants in the field and the plants in the lake?
[Table_1]
558
517
530
The diagrams show the depth and rate of breathing in a person at 12.00 pm and 1.00 pm.
What happens to the person's breathing between 12.00 pm and 1.00 pm?
578
552
599
The table shows the amount of carbon dioxide in the atmosphere in three different years.
[Table_1]
What is the most likely cause of this change?
548
561
578
