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Eighth Grade (Grade 8) Biology Questions

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Grade 8 :: Biochemistry by rebmidwife
The process where cells obtain energy from sugar molecules is called:
  1. biotic
  2. nitrogen cycle
  3. respiration
  4. food chains
Grade 8 :: Evolution by sharrik
Different kinds of plants living in the same area must compete for water. Which plant represents "survival of the fittest"?
  1. the plant with the largest leaves
  2. a plant with a compact root system
  3. the plant with the largest root system
  4. a plant with needles instead of leaves
Grade 8 :: Cell Structure and Function by Gr8Life
Grade 8 :: Human Reproduction by Robyn_Black
The release of an egg from an ovary is known as:
  1. ovulation
  2. fertalization
  3. menstruation
  4. afterbirth
Grade 8 :: Cell Structure and Function by clonekid
Serves as the cell's control center
  1. cytoplasm
  2. cell membrane
  3. mitochondria
  4. nucleus
Grade 8 :: Evolution by sharrik
Grade 8 :: Ecology by jsnell
The vast frozen plains located within the Arctic Circle.
  1. tundra
  2. Boreal Forest
  3. timberline
  4. permafrost
Grade 8 :: Circulatory and Immune Systems by sofian
The circulatory system is also known as the                         cardiovascular system                        .

The circulatory system contains the         heart         and                  blood vessels                   and also the             arteries             ,         veins         and the                capillaries                .

The pulmonary circulation is a short circulation from the         heart         to the         lungs         and back.

The heart is an organ that beats around             3 billion             times in a           70-year           lifetime.

It usually beats          60-100          times per          minute         .

The heart is a muscle around the size of your        fist       .

It is located in the          center          of your         chest         but slightly more to the        left       .

The heart gets            messages            from the body telling it to pump either        more        or less         blood         when it is needed.

Our         blood         is pumped by our          hearts         .

Our blood travels through lots of miles of                 blood vessels                 in our bodies, our blood also carries             nutrients            , water,          oxygen          and                  waste products                  to and from our body         cells        .

Blood is made up of other liquids,          solids          and a bit of          oxygen          and                  carbon dioxide                 .
Grade 8 :: Ecology by eacurr
Grade 8 :: Cell Structure and Function by clonekid
Controls the movement of materials into and out of the cell
  1. cell membrane
  2. nucleus
  3. cytoplasm
  4. mitochondria
Grade 8 :: Cell Structure and Function by clonekid
System of tubes and canals used to transport materials throughout the cell
  1. vacuoles
  2. chloroplast
  3. endoplasmic reticulum
  4. nucleus
Grade 8 :: Evolution by sharrik
Speciation takes place when variation occurs with
  1. geographical isolation
  2. death of an organism
  3. changes due to accidents
Grade 8 :: Anatomical Organization by Tunisia
Grade 8 :: Nervous and Endocrine Systems by LBeth
Grade 8 :: Circulatory and Immune Systems by LBeth
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