2011 january

Question 1

how do plants that live in ponds, the leaves of the plant float on the surface of the water. the leaf of this plant is adapted for floating on water. how? (1)

Answer 1

large area (allow thin / large / big / flat / light)

Question 2

a triangular shape helps a tree to survive in snowy conditions. how? (1)

Answer 2

(shape means that) snow falls off

Question 3

thorns help some plants survive. suggest how (1)

Answer 3

protect / stop it being eaten

Question 4

swollen leaves help some plants to survive in very dry places. suggest how (1)

Answer 4

stores/ absorbs water (from other parts of the plant)

Question 5

how do we know that human ancestors lived on earth? (1)

Answer 5

from fossils / bones

Question 6

which scientist suggested that humans have evolved from ape-like ancestors? (1)

Answer 6

darwin

Question 7

match the substances and information:

• alcohol, antibiotic, heroin, cigarette smoke
• used to treat bacterial diseases, a very addictive drug, may cause lung cancer, may cause babies to be born with abnormal limbs, may cause liver disease (4)

Answer 7

✏️ alcohol - may cause liver […]
✏️ antibiotic - used to treat […]
✏️ heroin - a very addictive […]
✏️ cigarette smoke - may cause lung […]

Question 8

finish the sentence: people use recreational drugs […] (1)

Answer 8

for pleasure

Question 9

match the ways of producing organisms and information:

• embryo transplantation, genetic engineering, taking cuttings, tissue culture
• taking part of the stem from a plant, then putting this part of the stem in wet soil in a plant pot, growing groups of cells from a plant on special jelly, transferring genes from one organism to a different organism, growing plants from seeds in a garden, separating groups of cells from a very young developing animal then putting the groups of cells into host mothers (4)

Answer 9

✏️ embryo trans […] - separating groups […]
✏️ genetic eng […] - transferring genes […]
✏️ taking cuttings - taking part […]
✏️ tissue culture - growing groups […]

Question 10

obesity (being overweight) is linked to several diseases and conditions. which three diseases are strongly linked to obesity? (3)

Answer 10

✏️ diabetes
✏️ heart disease
✏️ arthritis

Question 11

rice crops add to global warming because rice produces […] (1)

Answer 11

methane

Question 12

waste from the buffalo is spread on the rice fields. this means that the farmer needs to use less […] (1)

Answer 12

fertiliser

Question 13

using buffalo instead of a tractor helps to save […] (1)

Answer 13

fuel

Question 14

global warming is caused by […] (1)

Answer 14

the greenhouse effect

Question 15

name the two hormones used in IVF treatment (2)

Answer 15

✏️ FSH / follicle stimulating hormone

✏️ LH / luteinizing hormone

Question 16

describe the process of IVF (4)

Answer 16

✏️ egg(s) collected from ovary
✏️ (eggs) mixed with sperm or fertilisation occurs
✏️ fertilised egg divides
✏️ embryo formed
✏️ (embryos) inserted into womb / uterus
✏️ FSH matures egg and LH releases eggs