No questions found
Which row shows substances removed by excretion?
[Table_1]
566
580
557
Which two parts are included in the scientific name of an organism?
570
543
531
How many jointed legs does an insect have?
563
566
549
The photomicrograph shows a cell from a type of aquatic plant. Which labelled parts indicate that this is a plant cell?
521
576
567
The diagram shows a magnified image of a cell. The magnification is \( \times 360 \). Line LM represents the width of the image of the cell. Line LM is 18 mm long in this diagram.
What is the actual width of the cell?
566
509
596
Which factor would \textbf{decrease} the rate of diffusion of oxygen into cells?
531
502
501
Which molecule crosses a partially permeable membrane during osmosis?
567
559
549
The diagrams show the movement of particles across a membrane. The arrows show the direction of movement. Which diagram shows active transport?
589
576
537
Which substance is used to test a food for vitamin C?
562
533
531
What are enzymes made of?
518
548
598
What remains at the end of an enzyme-controlled reaction?
514
544
592
A plant is placed in the dark until all its stored starch is used up. The plant is placed in light with black paper over part of one green leaf. After eight hours, the leaf is tested for starch. Which diagram shows the appearance of the leaf after this test?
536
543
556
The diagram shows part of a cross-section of a leaf.
Which row shows the correct labels?
578
561
579
The diagrams show the different types of human teeth.
Which teeth are used for grinding food?
526
565
522
Which row shows the correct names of parts of the large and small intestines? [Table_1]
511
587
579
The diagram shows the apparatus used in an experiment. The apparatus was kept at 35°C.
What is likely to be present in the water surrounding the membrane after 45 minutes?
522
567
514
The arrows show the movement of substances from the soil into a root hair cell. Which substances move from the soil into the root hair cell?
595
519
576
By which process does water escape from stomata in the leaves?
532
573
567
Which row about the circulatory system is correct? [Table_1]
591
520
511
Which structures may become blocked in coronary heart disease?
541
512
533
What is defined as a disease-causing organism?
503
504
592
A student investigated the effect of temperature on respiration in yeast. The diagram shows the apparatus they used. Which substance turned the indicator from clear to cloudy?
546
522
514
The apparatus shown was used to investigate aerobic respiration in seeds. The apparatus was placed in a dark room. shows seeds soaked in water and a chemical which absorbs the gas produced by the seeds. All environmental conditions were kept constant. What will happen in the apparatus? [Table_1]
504
539
549
Why is yeast used in bread-making?
518
514
538
In the diagram, which label identifies the urethra?
597
590
523
The diagram shows a reflex arc. Which label identifies the motor neurone?
587
517
514
What is the role of insulin?
550
502
543
The diagram shows a seedling growing inside a dark box. Which type of responses affect the direction of growth of the root and the shoot inside the box?
562
571
569
Which row shows why only some infections can be successfully treated with antibiotics? [Table_1]
503
510
558
The diagram shows part of a flower. What is the part labelled X?
587
572
590
Which statement about the hormones involved in human puberty is correct?
513
545
550
The diagram shows the human female reproductive system. In which structure does fertilisation usually occur?
518
506
581
In mice, the allele for black hair is dominant to the allele for brown hair. Which proportion of offspring will have brown hair if a cross is made between a homozygous black mouse and a heterozygous black mouse?
551
551
519
Which row about variation is correct?[Table_1]
579
586
594
Humans have kept sheep for many centuries because they supply us with wool. The flow chart shows how a farmer would breed his sheep to provide more wool. Which process is described by this flow chart?
591
570
578
The numbers in the diagram show the amount of energy transferred through part of an ecosystem.
How much energy is transferred from herbivores to carnivores?
533
596
521
The diagram shows a food web in a rainforest.
How many trophic levels are shown in this food web?
527
576
539
The diagram shows the carbon cycle.
Which labelled processes represent respiration?
558
595
519
Vitamin A deficiency is a big health problem in some parts of the world and can cause problems such as blindness. Rice can be genetically modified to enable people to make vitamin A when they eat it. 150 g of this rice provides 60% of the adult recommended daily intake of vitamin A. How much rice does an adult need to get 100% of the recommended daily intake of vitamin A?
523
541
519
Which feature of bacteria makes them useful in genetic modification?
581
577
551
