YEAR 10 EVOLUTION AND GENETICS TOPIC TEST

Where is DNA found in the cell?

• In the genes

• In the nucleus

• In the membrane

• In the cytoplasm

Answer explanation

DNA is primarily found in the nucleus of eukaryotic cells, where it is organized into chromosomes. While some DNA is present in mitochondria and chloroplasts, the nucleus is the main location for genetic material.

Which statement is supported by a scientific theory of evolution?

• Individual animals that survive and reproduce are the least adapted to the environment in which they live.

• Most animals produce fewer offspring than their environment can support.

• The environment has no influence on the survival chances of animals.

• Variations in the offspring of animals can influence their chance of survival.

Answer explanation

The correct statement reflects that variations in offspring can affect survival, aligning with natural selection, where advantageous traits enhance survival and reproduction in a given environment.

Which process causes changes in chromosomes?

• Cell division

• DNA mutation

• Gene replication

• Reproduction

Answer explanation

DNA mutation causes changes in chromosomes by altering the genetic material. While cell division and reproduction involve chromosome distribution, they do not inherently change the chromosome structure like mutations do.

Where are you most likely to find DNA?

• Field mushroom

• Mineral crystal

• Natural gas

• Snail shell

Answer explanation

DNA is found in living organisms, including field mushrooms, which are fungi. In contrast, mineral crystals, natural gas, and snail shells do not contain DNA, making field mushrooms the correct choice.

The diagram shows pebbles of different sizes cemented together to form a rock. How was this rock formed?

• By magma cooling underground.

• By lava cooling above the ground.

• By heat and pressure under the ocean.

• By compaction of sediment and chemical changes.

Answer explanation

The rock formed by compaction of sediment and chemical changes, as it consists of pebbles cemented together, indicating a sedimentary origin rather than igneous or metamorphic processes.

Which of these fossils is younger than the fossil (image of fossil from Y)?

• (A) (star-shaped fossil)

• (B) (shell-shaped fossil)

• (C) (branch-shaped fossil)

• (D) (curved fossil)

Answer explanation

The star-shaped fossil (A) is younger than the fossil from Y, indicating it was formed more recently in geological time compared to the other options.

At which location was the oldest fossil found?

• W

• X

• Y

• Z

Answer explanation

The oldest fossil was found at location W, which has been identified through geological studies and dating methods as the site of the earliest known fossil evidence.

In which of the following environments would these fossils most likely have formed?

• Coastal lake

• Eucalyptus forest

• Fast-flowing river

• Sandy desert

Answer explanation

Fossils typically form in environments with calm waters where sediments can accumulate, making a coastal lake the most suitable choice. In contrast, fast-flowing rivers and sandy deserts are less conducive to fossil formation.

What term describes what happens when cells in an organism are functioning abnormally?

• Death

• Disease

• Evolution

• Natural Selection

Answer explanation

The term 'disease' describes a condition where cells in an organism are functioning abnormally, leading to health issues. In contrast, 'death', 'evolution', and 'natural selection' do not specifically refer to abnormal cell function.

Three scientists were awarded the Nobel Prize for developing a model of DNA. What was the name of one of these scientists?

• Darwin

• Mendel

• Wallace

• Watson

Answer explanation

One of the scientists awarded the Nobel Prize for developing the DNA model is James Watson. The other notable figures were Francis Crick and Maurice Wilkins, but Darwin, Mendel, and Wallace were not involved in this discovery.