3.
Which arrow in the food web diagram below points in the wrong direction?
- (A)
A
- (B)
B
- (C)
C
- (D)
D
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CSEC Biology Paper 1 May/June 2010 - Free CXC Past Paper with Answers
Free CXC Biology Paper 1 May/June 2010 past paper from 2010. Includes a worked answer key. Open the PDF, take a timed test, and study with AI on Caribbean AI.
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Which of the following is correct?
I only
I and IV only
II and III only
I, II, III and IV
Which of the following are involved in the cycling of nutrients in nature?
I. Bacteria II. Plants III. Earthworms IV. Humans
I and II only
I and III only
II, III, and IV only
I, II, III and IV
Which arrow in the food web diagram below points in the wrong direction?
A
B
C
D
Some insects are brightly coloured, but are difficult to spot as they sit on plants. This bright coloration may be important for
I. pollination II. blending into their environment III. attracting mates IV. hunting for prey
I and II only
III and IV only
I, II and III only
I, II, III and IV
Which arrow represents the smallest transfer of energy between organisms?
I
II
III
IV
At which point is MOST of the energy released to the environment?
I
II
III
IV
Which of the following shows the correct sequence for INCREASING complexity/specialisation?
III, IV, I, II, V
III, IV, V, I, II
IV, I, II, III
IV, V, I, III, II
Which of the following processes is involved in the passage of water through cell walls?
Diffusion
Osmosis
Assimilation
Active transport
A mature plant cell is different from a mature animal cell because the plant cell has
mitochondria
a cell membrane
a large permanent vacuole
a nucleus suspended in the cytoplasm
The process by which food is moved through the alimentary canal is called
digestion
mastication
peristalsis
swallowing
Which of the following are NOT autotrophs?
Algae
Mosses
Ferns
Fungi
A well-watered plant is set up as shown in the diagram above and left for a few hours in sunlight. A leaf from the plant is then tested for starch and no blue-black colour appeared. A likely explanation for this result is that the
soil in the pot dried out
jar contained no carbon dioxide
apparatus was not left long enough in sunlight
petroleum jelly prevented air from entering the bell jar
Item 13 refers to the table below which shows the results obtained when a food was tested by adding different reagents.
| Test | Result |
|---|---|
| Iodine | Blue-black colour |
| Sodium hydroxide and copper sulphate (Biuret reagent) | Purple colour |
| Benedict's or Fehling's solution and heating | No colour change |
The food contained
starch and protein only
reducing sugar and starch only
reducing sugar, starch and protein
protein, fat and non-reducing sugar
Which of the following are essential for the formation of healthy bones?
Calcium and Vitamin D
Calcium and Vitamin E
Iron and Vitamin A
Iron and Vitamin C
Which of the following statements BEST describes the function of ATP?
It stores food.
It is a means of energy transfer.
It speeds up chemical reactions in the cell.
Large quantities of energy can become available.
Which of the following is NOT a reason for placing green plants in an aquarium?
Providing food for the animals
Providing oxygen for the animals
Removing the chlorine from the water
Removing the animals' waste products
Which of the following characteristics is NOT a feature of respiratory surfaces?
Large surface area
Permanently moist
Good supply of blood
Thick membrane
Which of the following statements about aerobic and anaerobic respiration is correct?
Does not use oxygen / Uses oxygen
Occurs in the cytoplasm / Occurs in the mitochondria
Releases large amounts of energy / Releases small amounts of energy
At least one product is organic / Products are always inorganic
From the results, one may conclude that
Leaf X has more stomata on Surface 2 than Leaf Y.
Leaf Y has more stomata on Surface 1 than Leaf X.
Leaf X has a faster rate of transpiration than Leaf Y.
Leaf Y has a faster rate of transpiration than Leaf X.
As organisms increase in size, the process of diffusion limits the transport of substances because
their surface area to volume decreases
their surface area to volume increases
they develop transport systems
they produce more waste products
Which of the following plants does NOT have a modified vegetative storage organ?
Carrot
Ginger
Mango
Potato
Through which process does the body rid itself of nitrogenous waste products?
Excretion
Diffusion
Evaporation
Osmoregulation
Items 23-24 refer to the diagrams below which represent some components of blood.
(A) (B) (C) (D)
In answering items 23 - 24, match each item with one of the options above. Each option may be used once, more than once or not at all.
Engulfing disease-causing organisms
Transport of oxygen
Items 25-26 refer to the diagram of the mammalian kidney. I II III IV
In which part of the kidney is the loop of Henle located?
I
II
III
IV
Into which structure is urine emptied?
I
II
III
IV
In the movement of the upper arm from position X to position Y in the diagram below, which of the following describes the action of biceps and triceps muscles? X Y I. Biceps contract II. Biceps relax III. Triceps contract IV. Triceps relax
Which of the following describes the action of biceps and triceps muscles?
I and III only
I and IV only
II and III only
II and IV only
Which of the following adaptations in plants is NOT used to conserve water?
Thoms
Small leaves
Long leaves
Cuticle thickness
Movement is important to the survival of a plant because it ensures that it I. can find food II. grows towards light III. can find water IV. can reproduce
I only
I and IV only
II and III only
I, II, III and IV
Which row in the table groups bones correctly?
Pelvic girdle, ribs, femur / Skull, humerus, vertebral column
Humerus, femur, ribs / Skull, vertebral column, pelvic girdle
Pelvic girdle, humerus, femur / Vertebral column, ribs, skull
Skull, vertebral column, ribs / Humerus, femur, pelvic girdle
Which of the following types of lens will correct short sightedness?
Items 32-33 refer to the figure showing a diagram of the tip of a stem and a source of light.
After three days, where will the concentra- tion of auxin be HIGHEST?
I
II
III
IV
After three days, what will be the response of the stem?
Bend to the right
Bend to the left
Increase in height
No response
Which of the following diagrams correctly represents the pathway of the transmission of an impulse for a spinal reflex?
Which part of the brain would be used in solving a mathematical problem?
Cerebrum
Cerebellum
Hypothalamus
Medulla oblongata
Which of the following functions of the skin is an example of homeostasis?
Storage of fats
Release of sweat
Secretion of sebum
Maintenance of body temperature
The diagram below represents the growth curve of a culture of yeast cells. Which section of the graph shows the MOST rapid rate of growth?
I - II
II - III
III - IV
IV - V
Which of the following glands produces a hormone which is directly responsible for growth in human beings?
I
II
III
IV
Which of the following sequences of events is correct?
Fertilization → implantation → copulation→ gestation
Fertilization → implantation → gestation → copulation
Copulation → fertilization → implantation→ gestation
Copulation → implantation → Fertilization → gestation
The reproduction of amoeba by binary fission is an example of asexual reproduction because
the nucleus divides by mitosis
the nucleus is not involved in the cell division
two offspring are produced by one parent
the cytoplasm is divided into two equal halves
Items 41-42 refer to the diagram below.
The type of seed represented above is
monocotyledonous
dicotyledonous
wind dispersed
water dispersed
The MAIN food reserves found in the parts labelled Y are likely to be
protein and fats
protein and calcium
starch and fats
starch and protein
Which of the following statements is TRUE of wind dispersed seeds?
They have feathery hairs which al- low them to be taken great distances.
They have hooks which allow them to be taken great distances.
They are rapidly strewn from dry pods.
They are found in succulent fruit.
Which of the following events does NOT occur during mitosis?
Chromosome makes an exact copy of itself.
Chromosomes align themselves on the equator of the spindle.
Two chromatids are joined by a centromere.
The chromatids exchange genetic information.
The production of gametes during the process of meiosis can lead to
smaller population size
larger population size
variation in a population
no change in the characteristics of a population
Continuous variation in humans is illustrated by
sex/gender
tongue rolling
blood groups
adult heights
A characteristic is said to be sex linked if it
only affects one particular sex
is carried on the sex chromosomes
develops during sexual intercourse
is passed on from father to son
Which of the following is the BEST explanation for these observations?
Camouflaging protects grasshoppers from predators.
Brown grasshoppers mutate when placed in green areas.
Green grasshoppers are better adapted.
More food is available in green areas.
If a diploid organism has two different alleles for the same gene, it is described as being
dominant
homozygous
heterozygous
recessive
Which of the following statements about the differences between artificial and natural selection are true?
I only
I and II only
II and III only
I, II and III
Which of the following correctly lists examples of pathogenic, nutritional deficiency and physiological diseases?
Diabetes / AIDS / Anaemia
AIDS / Diabetes / Anaemia
Anaemia / Diabetes / AIDS
AIDS / Anaemia / Diabetes
In which of the ways listed below can hypertension be treated or controlled? I. Eating iron-rich foods II. Low carbohydrate diet III. Low salt intake IV. Exercise
I and II only
II and III only
III and IV only
I, II, III and IV
An animal which carries a disease-causing organism but is not adversely affected by it is known as a
host
vector
parasite
pathogen
Which of the following symptoms indicates the abuse of alcohol?
Slowed muscular skills, increased body temperature, feelings of increased energy
Vasodilation, impaired mental functioning, loss of consciousness
Vasoconstriction, violent behaviour, reduced need for sleep
Slurred speech, loss of appetite, lung and nasal damage
Which of the following statements are implications of diseases in agricultural crops? I. Loss of crops II. More jobs for workers in the area III. Lower income for government IV. Higher food import cost
I and IV only
II and III only
I, III and IV only
II, III and IV only
Which of the following are appropriate methods for measuring biotic and abiotic factors respectively?
Quadrat, sweep / Thermometer, pH
Lightmeter, pH / Thermometer, paper, quadrat
Thermometer, jar, sweep net / Lightmeter, pH
Sweep net, jar, thermometer / Lightmeter, pH, paper, quadrat
The term 'habitat' refers to
an area where several organisms live
the physical characteristics of an area
the biological characteristics of an area
the area in which a particular organism lives
Item 58 refers to the figure showing the growth curve of a population colonising a new habitat.
Which of the following accounts for phase I?
There is a small number of reproducing individuals.
There is competition for resources.
There is competition for food.
Death rate exceeds birth rate.
Non-renewable resources include:
I. bauxite and gold II. forests and swamps/wetlands III. natural gas and oil
I and II only
I and III only
II and III only
I, II and III
Which of the following practices does NOT help to conserve the environment?
Using natural fertilizers
Reafforestation
Crop rotation
Overgrazing