Unit Review
Which adaptation is used by polar bears to maintain internal homeostasis in cold temperature? -three layers of fur -blubber -finding shade underground -white skin
-Blubber
Which is tough and flexible layer that surrounds plant cells, as well as some algal and bacterial cells? -cell wall -centriole -nucleus -cell membrane
-Cell wall
Which organelles are found only in plant cells? -cell membrane, vacuole -cell wall, chloroplasts -cell wall, vacuole -cell membrane, chloroplasts
-Cell wall chloroplasts
In which specimen were cells first identified? -microorganism -cork bark -DNA -mitochondrion
-Cork Bark
Which discovery supported the endosymbiotic theory? -DNA in mitochondria -DNA in the cell nucleus -DNA in ribosomes -DNA in the cytoplasm
-DNA in mitochondria
Which motion of particles across a membrane requires energy? -from high to low concentration -from low to high concentration -no concentration gradient -through dynamic equilibrium
-From low concentration to high concentration
Which organelle packages and distributes proteins that are received from the endoplasmic reticulum? -vacuole -cytoplasm -Golgi Apparatus -ribosome
-Golgi Apparatus
Which solution would most likely cause a plat placed in it to become firmer and more rigid? -hypertonic -hypotonic -isotonic -osmosis
-Hypotonic
In which solution might a cell contain homeostasis through diffusion? -isotonic -hypertonic -hypotonic -concentrated
-Isotonic
For diffusion to occur, which condition must be met? -A concentration gradient must exist -a hypotonic external environment must exist -a hypertonic external environment must exist -dynamic equilibrium must exist
-A concentration gradient must exist
Which homeostatic process requires energy to move particles across the plasma membrane? -active transport -passive transport -dynamic equilibrium -osmosis
-Active Transport
Which homeostatic process moves particles against a concentration gradient? -dynamic equilibrium -passive transport -osmosis -active transport
-Active transport
Which statement is most likely to apply to a cell that has DNA within its cytoplasm? -it lacks ribosomes -it has membrane-bound organelles -it is multicellular -it performs all functions for the organism
-It performs all functions for the organism
Which is a structure that contains the cell's heredity information and controls the cell's growth and reproduction? -nucleus -Golgi Apparatus -ribosome -mitochondrion
-Nucleus
Which structure us unique to eukaryotic cells? -DNA -cell membrane -ribosomes -Nucleus
-Nucleus
The discovery of Mitochondrial DNA (mtDNA) had no effect on which area of scientific investigation? -endosymbiotic theory -inheritance research -forensic science -study of cork bark
-Study of cork bark
Which organelle is used as temporary storage for water, waste products, food, and other cellular material? -Mitochondrion -lysosome -centriole -Vacuole
-Vacuole
Which statement about vacuoles is true? -only plant cells contain vacuoles -only animal cells contain vacuoles -Vacuoles are larger in plant cells than in animal cells -Vacuoles are larger in animal cells than in plant cells
-Vacuoles are larger in plant cells than in animal cells
Which plant cell organelle supports and maintains the cell's shape and protects the cell from damage? -cell membrane -cell wall -chloroplast -vacuole
-cell wall
The _________ of the cell directs cell activity and acts like the control center. -nucleus -ribosome -nucleolus -mitochondrion
-nucleus
A diseased cell is no longer able to produce proteins. Which cell structure is most likely malfunctioning? -nucleus -cytoplasm -ribosome -mitochondrion
-ribosome
What is the basic unit of structure and function of all living organisms? -Mitochondrion -DNA -Nucleus -Cell
Cell
