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Which condition is essential for natural selection to result in a new species?
a) unlimited resources b) an inherited variation c) a static environment d) a long life span
Upon close examination of the skeleton of an adult python, a pelvic girdle and leg bones can be observed. These features are an example of _____?
a) homologous structures b) artifical selection c) comparative embryology d) bestigal structures
What is the movement of genes into and out of a gene pool called?
a) migration b) nonrandom mating c) direct evolution d) random mating
Which organisms help to reduce overpopulation in a deer herd?
a) Primary Consumer and parasites b) Primary consumers and predators c) parasites and scavengers d) parasites and predators
Eliminating an organism from an ecosystem would have which of the following effects?
a) increased carbon dioxide b) food chains would be disrupted c) Plants will die and go extinct d) help balance the ecosystem
One organism benefits and the other neither benefits nor is harmed
a) Parasitism b) Commensalism c) Neutralism d) Mutualism
Which of the following describes why organisms with good traits or characteristics survive to reproduce?
a) Punctuated equilibrium b) Acquired traits c) Survival of the fittest d) None of the above
Which cellular process takes place in the ribosomes that are bound to the endoplasmic reticulum?
a) The breakdown of waste material b) The conversion of radiant energy to glucose c) The synthesis of new proteins d) The replication of nucleic acids
Which group of organelles is directly responsible for the production of new molecules within a cell?
a) Ribosomes, the endoplasmic reticulum, and Golgi apparatuses b) Golgi apparatuses, lysosomes, and the plasma membrane c) The endoplasmic reticulum, plastids, and vacuoles d) The nucleolus, vacuoles, and ribosomes
Active transport is a way for molecules to move across the cell membrane. When active transport is used to move molecules, what is required?
a) very small molecules b) a concentration gradient c) osmosis d) energy
Individuals who lack lactase are unable to break down the sugar n milk (lactose). Which term best describes lactase?
a) Carbohydrate b) Lipid c) Enzyme d) Fatty Acid
Which of these statements best explains the process of energy conversion that takes place in the mitochondria?
a) Energy is required for carbon dioxide molecules to form six-carbon sugar molecules. b) Water molecules and radiant energy are necessary for anaerobic respiration to take place. c) Oxygen molecules release energy in the form of heat during combustion reactions. d) The energy in the bonds of glucose molecules is transferred to the phosphate bonds in ATP.
During which phase of mitosis does the cell copy its DNA?
a) prophase b) anaphase c) metaphase d) interphase
egg and sperm are types of sex cells called
a) body cells b) gametes c) embryos d) somatic cells
these are usually found at the opposite ends of a cell during mitosis or meiosis and they are used to help pull the cell apart?
a) centriole b) spindle fibers c) partner chromosome d) chromosome
This process is a form of active transport that moves three sodium ions to the outside of a cell for every two potassium ions that it moves to the inside of the cell. Which of these best explains why energy is needed for active transport?
a) Ions are negatively charged b) Ions are attached to large proteins. c) Ions are trapped inside the plasma membrane. d) Ions are moved against the concentration gradient.
Which energy conversion takes place in some plant cells, but never in animal cells?
a) chemical energy to light energy b) chemical energy to the energy of motion c) the energy of motion to sound energy d) light energy to chemical energy
A thermostat maintains an ideal temperature of a room. What cell process is similar to this?
a) food storage b) photosynthesis c) homeostasis d) active transport
If a particle enters the cell by active transport, then the particle is
a) more concentrated outside the cell than inside it b) needed for synthesizing a large molecule c) more concentrated inside the cell than outside it. d) being moved without the use of energy
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