No questions found
Which process is carried out by all organisms?
555
595
589
According to the binomial system, how should a human be named?
536
592
559
Some of the structures found in cells are listed:
• cytoplasm
• cell membrane
• cell wall
• chloroplast.
How many of these structures are found in the cells of all living organisms?
534
544
547
The photomicrograph shows a cell from a type of aquatic plant.
Which parts labelled on the photomicrograph indicate that this is a plant cell?
534
570
574
Which type of cell transports oxygen?
531
542
583
The cell shown in the diagram has been magnified 3000 times. The diagram is 21 mm wide.
What is the actual diameter of the cell?
541
567
526
What are features of osmosis?
576
590
506
The diagram shows apparatus which can be used to demonstrate osmosis.
After one hour, what would happen to the liquid levels in the glass tubes?
565
532
518
Which substances are made by linking together glucose molecules only?
548
536
518
The graph shows the effect of pH on the rate of reaction of an enzyme.
What does the graph show?
559
507
523
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?
594
536
574
The graph shows how the percentage of protein found in potatoes was affected by the concentration of nitrate fertiliser added to the crop when it was growing.
These results suggest that greater concentrations of nitrate fertiliser allow the potatoes to make more
595
520
520
Which stage of nutrition takes place when food molecules become part of a body cell?
574
521
557
The diagram shows the apparatus used in an experiment to demonstrate two processes that take place in the body.
After one hour, the water outside the dialysis tubing contained reducing sugars.
Which two processes are represented by this experiment?
571
562
550
In which order does water pass through these structures in a plant?
567
578
523
What ensures that blood flows in one direction in the human circulatory system?
583
583
532
Some functions of blood are listed.
1. antibody production
2. blood clotting
3. oxygen transport
4. phagocytosis
What are functions of white blood cells?
533
523
520
Which is an example of a transmissible disease?
513
564
544
The diagram shows some of the structures in a human lung. Where is the carbon dioxide concentration highest?
542
577
560
What is produced during anaerobic respiration in muscles?
531
562
553
The amount of urea in the blood increases as it passes through organ X. What is organ X?
530
556
568
Which structure contains relay neurones?
591
569
596
A man injures his arm in an accident. Afterwards, he can move his hand but cannot feel objects touching his hand.
What could cause this?
567
541
523
What are the effects of adrenaline on the human body?
[Table_1]
600
538
595
The diagram shows a flower cut in half.
Which structure receives the pollen nucleus during fertilisation?
558
573
583
During childbirth, what must happen to the amniotic sac, cervix and the uterus wall?
[Table_1]
591
547
565
Which term is used to describe alleles that are always expressed when they are present in the genotype?
587
582
530
Some human phenotypes are listed.
1 body mass
2 foot size
3 height
4 sex
Which features are examples of continuous variation?
545
565
500
A food chain is shown.
potato plant → slug → hedgehog
By which process is energy transferred from the slug to the hedgehog?
597
508
504
The diagram shows a food web.
What is organism L?
568
530
563
The diagram shows part of the carbon cycle.
What do arrows X and Y represent?
565
585
500
What can be used to reduce competition between crop plants and weeds?
579
545
513
Large areas of forest are cut down in order to clear the land for other uses.
If the land is not replanted with trees or crops, what effect does this have on the atmosphere?
566
573
543
The diagram shows four positions on a river where water samples were taken. Which graph shows oxygen concentrations in the river?
504
519
524
