No questions found
Which characteristics of all living organisms are needed to release energy for growth?
591
546
556
Which pair of organisms belong to the same genus?
597
546
568
The diagram shows an animal.
What is the animal?
1 animal with a vertebral column ........................ vertebrate
animal with an exoskeleton ........................ go to 2
2 no distinct head, thorax and abdomen .......................... A
distinct head, thorax and abdomen .......................... go to 3
3 eye occupies less than one third of the head ................ B
eye occupies more than one third of the head ................ go to 4
4 wings are wider than they are long .......................... C
wings are longer than they are wide .......................... D
586
555
568
Which row shows the structure on the outside of a plant cell and the location of the chloroplasts in the cell?
[Table_1]
596
556
593
The diagram shows some cells.
c. Where are these cells found?
591
501
506
What is the equation for calculating the magnification of a biological drawing?
500
554
565
Which words complete the definition of diffusion?
'Diffusion is the net movement of particles from a region of their ......1...... concentration to a region of their ......2...... concentration, ......3...... a concentration gradient.'
591
584
500
Cyanide is a poison that stops respiration. A paramecium is a single-celled freshwater organism. What is the most likely effect of cyanide in a paramecium?
512
539
536
In a photosynthesis experiment, a plant is left in bright sunlight for several hours. A leaf is then removed from the plant and tested for starch, using iodine solution.
The diagram shows the leaf from the plant that was used in the experiment.
Which diagram shows the result of the experiment?
523
548
570
An experiment was carried out to investigate the effect of pH on enzyme action. The graph shows the results.
What are the labels for the x-axis and the y-axis?
575
575
543
Four test-tubes were set up as shown in the diagram. In which test-tube is the starch digested most quickly?
572
595
547
Which row shows the raw materials needed for photosynthesis and the products of photosynthesis?
[Table_1]
571
536
584
Which food is the best source of vitamin C?
539
545
581
Which reagent is used to test for the presence of vitamin C?
555
524
599
The diagram shows a large food molecule changing into smaller molecules.
What is process X?
509
564
595
The diagram shows part of the human alimentary canal and associated organs.
Which structure produces hydrochloric acid?
520
549
557
The diagrams show sections of a leaf and a root.
Which two labelled structures identify xylem?
530
536
525
Which graph shows the effect of increasing humidity on the rate of transpiration?
520
591
587
The diagram shows a section through a mammalian heart.
Which part carries blood directly from the lungs?
561
523
598
Which component of blood produces antibodies?
584
583
519
Some features that help to defend the body against pathogens are listed.
1. mucus
2. skin
3. stomach acid
4. phagocytosis
Which features can prevent pathogens entering body tissues?
556
560
583
The diagram shows the apparatus used by a student to investigate respiration in woodlice (small arthropods).
Which explanation about the direction that the water drop will move is correct?
571
562
527
Some students placed yeast, sugar and water into a bottle. They then placed an empty balloon over the opening of the bottle. The bottle was left in a warm place for one hour. During this time the balloon increased in size.
Why does the balloon increase in size?
546
540
600
The diagram shows part of the excretory system of a female mammal.
What is tube X?
587
571
532
The diagram shows a reflex arc that passes through the spinal cord.
Which type of neurones are X and Y?
546
530
538
The diagram shows a section through the skin. Which labelled part is a hair erector muscle?
568
533
515
A seed is placed and grown on a rotating disc, as shown.
Which diagram shows the appearance of the seedling shoot after seven days?
550
552
553
Which is an example of sexual reproduction?
568
546
587
The diagram shows part of the male reproductive system.
Which structures manufacture sperm and the fluid the sperm are transported in?
559
513
586
Which type of birth control prevents sperm from entering the vagina?
577
538
564
Which are functions of mitosis?
1. growth
2. production of gametes
3. repair of damaged tissue
4. replacement of cells
5. asexual reproduction
556
600
549
A species of insect usually has pale-coloured wings. This helps to camouflage them on pale-coloured tree trunks. A few of the insects in this species have darker coloured wings.
After a number of years the tree trunks become darker in colour due to environmental changes. The insects with dark-coloured wings become more common than insects with pale-coloured wings in this species.
Which process causes this change in the proportion of insects with dark-coloured wings?
594
530
541
The diagram shows a woodland food web.
Which statement is not correct?
572
500
594
Which organism makes its own organic nutrients using light energy?
526
505
519
Which process releases carbon dioxide into the atmosphere?
536
584
526
Which row shows what is used to make biofuel, bread and fruit juice?
[Table_1]
583
552
552
What is an effect of an increase in the use of insecticides?
527
555
545
