Unicellular Vs. Multicellular Organisms Question Preview (ID: 22775)
Unit Test 4 Part 2.
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complex organisms require a large number of cells that
a) are specialized and work together
b) resist being attacked by viruses and bacteria
c) will keep the organism warm
d) can retain more water than a small number of cells
Which must be present in order for something to be classified as an organism?
a) nucleus
b) organ
c) cell
d) organelle
An organism such as a nematode worm may have only 1000 cells. It should be classified as being
a) a virus
b) a bacteria
c) unicellular
d) multicellular
What is the most likely function of a cell that is shaped like the root and stem of a tree?
a) to provide structure and support
b) to carry blood throughout the body
c) to provide a cover over body tissues
d) to carry impulses throughout the body
Which parts of a plant function as an organ?
a) leaves
b) spores
c) root hairs
d) chlorophyll molecules
An elephant is a multicellular organism that weighs about 200 pounds at birth and can grow to weigh as much as 15,000 pounds. What increases as the elephant grows into an adult?
a) the size of each body cell
b) the number of cells in the body
c) the amount of energy in its cells
d) the collection of water in each cell
Scientists found a new species of a complex organism at the bottom of the ocean. The organism most likely
a) is unicellular
b) is a form of bacteria
c) is made of multiple cells
d) lacks an organized nucleus
Which statement about all living organisms is true?
a) They have limbs
b) They produce their own food
c) they breathe air
d) they have at least one cell
Which of the following represents the smallest level or organization in the body?
a) cardiac muscle tissue
b) the heart
c) a muscle cell
d) the circulatory system
Which is the term given to a projection of cytoplasm, or false foot, used by some protists for feeding or movement?
a) trichocyst
b) flagellum
c) cilia
d) pseudopod
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