Worksheets2018 HSC Biology MC
Total questions: 20
Worksheet time: 39mins
Why do some ectotherms bask in the sun?
To absorb vitamin D
To increase their activity
To decrease their metabolic rate
To constrict blood vessels close to the skin
Which substance in the table is correctly matched to the main form in which it is carried in mammalian blood?
A
B
C
D
Which defence adaptation in the table is correctly matched with one of its features?
A
B
C
D
Which of the following describes the daughter cells produced as a result of mitosis?
Two genetically different cells
Two genetically identical cells
Four genetically different cells
Four genetically identical cells
Darwin and Wallace proposed the theory of evolution by natural selection.
Punctuated equilibrium differs from this theory in that punctuated equilibrium
occurs in relatively short bursts of rapid change.
requires genetic variation to exist in a population.
is driven by selection pressures in the environment.
discounts the idea that living organisms share a common ancestor.
The work of which of the following scientists demonstrated the mutagenic nature of radiation?
Mendel
Sutton
Tatum
Watson
Students dissected a mammalian kidney and drew the following diagram.
Which row in the table shows the correct labels for X, Y and Z?
An organism suspected of causing a disease is described as being unicellular, having a cell wall and lacking a nucleus. How is this organism classified?
A bacterium
A fungus
A protozoan
A virus
Sunken stomata can be found in the leaves of some Australian plants. A section of such a leaf is shown.
How do sunken stomata assist the plant to conserve water in a dry environment?
They trap moist air, reducing humidity.
They prevent entry of gases into the leaf.
They accumulate moist air, reducing transpiration.
They increase the surface area available for transpiration.
Both artificial insemination and cloning are reproductive techniques that can decrease the genetic diversity of a population.
Which row of the table provides a correct reason for each technique’s contribution to this decrease?
A
B
C
D
The following plants were presented to a quarantine office in Australia as part of a shipment of plants entering Australia for the plant nursery trade.
Which of the following is a decision that the quarantine office is likely to make?
Plant W can enter Australia as it looks like it has ‘black spot’ which already occurs in Australia.
Plant X can enter Australia as it is unlikely the disease it has will transfer to Australian species.
Plant Y cannot enter Australia as it has a disease caused by shortage of soil magnesium.
Plant Z cannot enter Australia because its appearance suggests it may be carrying live insects.
The graph shows four possible relationships between ambient temperature and body temperature.
Which line on the graph represents the relationship between ambient temperature and body temperature for an endotherm in a terrestrial environment?
W
X
Y
Z
Red-bellied Black Snakes are a natural predator of frogs in Australia. With the introduction of Cane Toads into northern Australia, those snakes with jaws large enough to eat the large poisonous toads have died and those with smaller jaws have survived. Today, Red-bellied Black Snakes in northern Australia have, on average, smaller jaws than those in southern Australia.
Based on this information, which of the following statements is true?
Divergent evolution has occurred in the snake populations.
Convergent evolution has occurred in the snake populations.
Evolution has not occurred as the snakes are still all one species.
Evolution has occurred because snakes have developed resistance to the toxin.
The following pedigree shows the inheritance of a disorder.
Which row of the table shows the genotypes of individuals 1 and 2?
Which row of the table is correct with respect to the substances that pass through the nephron?
A
B
C
D
How do helper T cells assist in raising a specific immune response to a pathogen?
They mass produce specific antibodies.
They stimulate the cloning of specific T cells.
They are cloned and differentiate to become specific cytotoxic T cells.
They produce cytokines that stimulate the cloning of specific phagocytes.
The diagram shows the life cycle of the malaria parasite, Plasmodium sp. Five stages in this life cycle are numbered on the diagram.
To prevent malaria, the following four strategies have been used:
• taking anti-malarial drugs
• spraying swamps with insecticides
• using mosquito nets over beds
• administering a malaria vaccine.
Which row in the table shows the stage in the life cycle in which each of these strategies would be most effective?
The micrograph shows normal-sized human red blood cells, three of which are infected with the ring stage of Plasmodium falciparum.
Which of the following is the best estimate of the diameter of the Plasmodium?
0.002 mm
0.8 µm
2 mm
8 µm
Colour blindness in humans is determined by a sex-linked gene. Two family trees are shown.
Which row of the table shows the probability of colour-blind offspring of each sex if individuals 1 and 2 were to have children together?
Two organisms (X and Y ) live in an estuary and maintain physiological function from the freshwater end to the seawater end of the estuary.
The graph shows the salt concentration of the internal tissues of each organism at different locations along the estuary.
Based on this information, which of the following is true?
X exhibits enantiostasis and homeostasis.
Y exhibits enantiostasis and homeostasis.
X exhibits homeostasis but not enantiostasis.
Y exhibits homeostasis but not enantiostasis.
