6th grade cells, genetics and evolution

Question 1

Pond water is viewed under a microscope. A tiny organism moves using a whip-like tail and has a nucleus and chloroplasts. What is true?

• A. It cannot be alive because it is so small
• B. It must be a bacterium because it is small
• C. It is a multicellular plant
• D. It is a single-celled organism that carries out all life processes in one cell

Question 2

What does the ribosomes do?

• A. where proteins are made
• B. where photosynthesis happens
• C. controls which substances enter and leave the cell
• D. a thin, flexible layer around the cytoplasm

Question 3

Cells: which statement is NOT true?

• A. All plant cells have chloroplasts.
• B. Both plant and animal cells have a nucleus, cytoplasm and a cell membrane.
• C. Bacterial cells have no nucleus.
• D. Plant cells have a cell wall but animal cells do not.

Question 4

Plant and animal cells: which statement is NOT true?

• A. Not every plant cell has chloroplasts.
• B. Both plant and animal cells have mitochondria.
• C. Plant cells do not need mitochondria because they photosynthesise.
• D. A cell wall is made of cellulose in plants.

Question 5

Muscle cells in a sprinter's legs contain huge numbers of one structure. Which?

• A. mitochondria
• B. vacuoles
• C. chloroplasts
• D. cell walls

Question 6

Which part of a cell strengthens and supports a plant cell?

• A. mitochondria
• B. cell wall
• C. chloroplasts
• D. cell membrane

Question 7

This is a plant cell. Which part has the ring around it?

• A. cell wall
• B. mitochondria
• C. cytoplasm
• D. nucleus

Question 8

Evolution: which statement is true?

• A. Dinosaurs and early humans lived at the same time.
• B. Species can become extinct.
• C. Humans evolved from modern chimpanzees.
• D. Individual animals evolve during their own lifetime.

Question 9

Is this organism unicellular or multicellular: an earthworm?

• A. unicellular (one cell)
• B. multicellular (many cells)

Question 10

Where is this found: mitochondria?

• A. plant cells only
• B. both plant and animal cells

Question 11

Which part of a cell matches this description: jelly-like liquid where most chemical reactions take place?

• A. cytoplasm
• B. cell wall
• C. cell membrane
• D. nucleus

Question 12

Is this continuous or discontinuous variation: Rhesus blood type (positive or negative)?

• A. continuous
• B. discontinuous

Question 13

Evolution: which statement is NOT true?

• A. Birds are descended from dinosaurs.
• B. Evolution happens over many generations.
• C. Individual animals evolve during their own lifetime.
• D. Fossils are evidence for evolution.

Question 14

What do fossils tell us about living things?

• A. Fossils are only made of plastic.
• B. Living things have never changed.
• C. Dinosaurs lived at the same time as the first humans.
• D. Living things have changed over very long periods of time.

Question 15

Single-celled and many-celled life: which statement is true?

• A. All single-celled organisms are bacteria.
• B. Single-celled organisms cannot move.
• C. A unicellular organism carries out all seven life processes in one cell.
• D. A mushroom is a single cell.

Question 16

Five students measured their heights in cm: 161, 154, 182, 167, 148. What is the range of their heights, in cm?

Answer cm