Biology STAAR Practice #1

What organs are in the nervous system?

• skin

• brain

• muscles

• heart

What organ is part of the integumentary system?

• brain

• skin

• heart

• lungs

Cyclins signal cells to progress through stages of cell replication. Uncontrolled production of cyclins will most likely result in...

• the formation of haploid cells

• transfer of cyclins to other cells

• formation of tumors

• death of the cell

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Farmers spray pesticides on plants to protect plants from being eaten by insects. Some individual insects have a genetic mutation that makes them resistant to the pesticides. Which best describes how only a few resistant individuals resulted in the pesticide becoming ineffective?

• the resistant insects change the toxin on the plants, making it safe for others

• the resistant insects grow larger and eat less of the plants

• the resistant insects eat the contaminated surface and leave the rest for others

• the resistant insects are able to survive to reproduce and create a population that is also resistant

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What property is shared by cells of all living things?

• the cells contain DNA composed of adenine, thymine, guanine, and cytosine

• the cells are surrounded by a phospholipid bilayer and a cell wall made of cellulose

• the cells have chromosomes that are located inside a membrane-bound nucleus

• the cells rely on mitochondria to carry out aerobic cellular respiration

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Which organism gets the LEAST energy?

• eagle/bird

• snakes

• rabbits

• grass/plants

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Which organism has the MOST energy?

• eagle/bird

• snake

• rabbit

• grass/plants

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Which best explains how the cell cycle is important to the life cycle of a frog?

• it enables frogs to produce tadpoles that are clones

• it allows frogs to grow, develop, and reproduce

• it prevents overproduction of frog offspring

• it ensures the best adapted frogs survive and pass on traits to offspring

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What organs are part of the digestive system?

• heart

• skin

• brain

• intestines/stomach

What organs are in the muscular system?

• brain

• muscles

• lungs

• heart