Life Science Phase 1

What is a cell?

• A phone

• Signal

• Basic unit of life

• A renewable energy

Unicellular means...

• Two cells

• One cell

• Four cells

• Three cells

Multicellular means

• Only one cell

• Many different cells

Cell Membrane is a structure that keeps the cell's...

• Contents separate from its external environment

• Contents with it external environment

Cytoplasm is..

• Gives the cell shape and tightness

• Genetic material

• single molecule

• Watery, jellylike substance that can include other cell structures

A student is examining a cell using a microscope. She is able to identify the cell membrane, cytoplasm, a small vacuole, and the nucleus, but she does not see a cell wall or any chloroplasts. She concludes that the cell is a eukaryotic cell.

Which of the following is evidence that her conclusion is correct?

• The presence of a nucleus

• The presence of cytoplasm

• The absence of chloroplasts

• The absence of a cell wall

What is a nucleus?

• Where genetic material is contained. Core of an atom, consisting of protons and neutrons containing nearly all its mass.

• It protects the cell and give it shape.

• Absorbs the sun's energy for the production of food

• Protects cell and allows certain substances to move into and out of the cell

In addition to the cell wall, the water stored in a plant cell’s vacuole helps give the plant firmness and shape. When a plant is not taking in enough water from the soil through its roots, it uses up its stored water and its vacuoles shrink. When the vacuoles shrink, the plant wilts.

Which of the following is a conclusion based on the paragraph above rather than a given fact?

• Plants take in water from the soil through their roots

• Cell walls cannot maintain a plant’s shape and rigidity when the plant lacks water.

• Cell walls help give a plant cell firmness and shape

• Vacuoles help give a plant cell firmness and shape

What is the relationship between the plant and the duck?

• "A" represents oxygen produced by the duck and "B" represents carbon dioxide produced by the plant

• "A" represents carbon dioxide produced by the plant and "B" represents oxygen produced by the duck

• "A" represents oxygen produced by the plant and "B" represents carbon dioxide produced by the plant

• "A" represents the sunlight received by the plant and "B" represents the oxygen produced by the duck

What is photosynthesis?

• Plants using energy from the sunlight to make food

• Plants using water and minerals to make food

• Plants using carbohydrates to break down and release energy