M2 Organisation of living things

Which of the following statements about unicellular organisms is NOT correct?

• They have a complex structure.

• They include Archaea and Bacteria.

• They have a high SA:V ratio and rely on diffusion to obtain nutrients and remove wastes.

• They are thought to be the earliest organisms to inhabit Earth.

All specialised cells in a multicellular organism come from stem cells. Where are stem cells found?

• All throughout the body.

• Only in embryos.

• In embryos and certain parts of the body.

• In embryos and all throughout the body.

Which of the following is NOT an advantage of a multicellular organism?

• These organisms can grow to a large size.

• Each cell is incapable of surviving on its own.

• Multicellular organisms can carry out complex activities far beyond the capabilities of single cells.

• Multicellular organisms have well developed communication systems.

The shape of the root hair cell is a small protrusion from the root and it advantage for the plant is:

• provides a much greater surface area to anchor the plant in the soil.

• increases the surface area for the oxygen to diffuse out of the root.

• increases the surface area to absorb the glucose required by the plant.

• provides a much greater surface area for the absorption of water.

Which of the following lists the levels of organisation in a multicellular organism, from the simplest level to the most complex level?

• Organism, organ system, organ, tissue, cell, organelle

• Organelle, cell, organ, tissue, organ system, organism

• Organism, organ system, tissue, organ, cell, organelle

• Organelle, cell, tissue, organ, organ system, organism

The lowest level of organisation that is able to perform all of the activities required for life is:

• the cell; for example, a muscle cell.

• the organelle; for example, a mitochondrion.

• the organ; for example, the heart.

• the tissue; for example, heart muscle tissue.

Select the option that correctly fills in the gaps in the following sentence. The skin is a(n) (i)__ that is mainly made up of (ii)__ tissue.

• (i) tissue, (ii) epithelial

• (i) organ, (ii) connective

• (i) tissue, (ii) connective

• (i) organ, (ii) epithelial

The type of tissue through which the products of photosynthesis are transported around the plant is known as:

• Vascular tissue

• Dermal tissue

• Meristematic tissue

• Ground tissue

Which of the following options lists organ systems that are found in animals?

• Circulatory, nervous, mitochondria, excretory

• Circulatory, nervous, digestive, excretory

• Circulatory, neurons, digestive, excretory

• Heart, nervous, digestive, excretory

If all the cells in an organism contain the same genetic information with the exception of the sex cells, why aren’t they all the same?

• Only certain parts of the genetic information are ‘switched on’ when the cell differentiates.

• Not all of the genetic information is in each body cell.

• All of the genetic information is ‘switched on’ every time the cell differentiates.

• Only some cells have undergone differentiation.