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Warm up # 15
43: An organism's genotype is its:
a:Genetic makeup
b:Feather color
44: A heterozygous organism has:
a:2 identical alleles
b:2 different alleles for a trait.
45: What does codominance mean?
a:both alleles are dominant
b:alleles are neither dominant nor recessive.
Warm up # 16:
46:What happens during Meiosis?
a:Each sex cell loses half of its chromosome
B:Sex cells copies itself to form 4 new chromosomes.
47:What is mutation?
a:any change in a gene or chromosome
B:any change in the phenotype.
48: The mistaken idea that living things arise from nonliving sources is
known as______
Warm up # 17:
49: Homeostasis refers to :_________
50: What is the total magnification of a microscope with one lens 15X and
the other 30 X?________
51: Which is part of the cell theory?
a: All cells are produced from other cells
b: Cells are one of several basic units of structure and function in living
things.
Warm up # 18:
52:What is the function of the cell wall?
53: Which organelle produces most energy?
54: Which organelle is found in plants, animals and bacterial cells?
a:Ribosomes.
b:Golgi bodies.
Warm up # 19:
55: Which refers to movement of water molecules through a selectively
permeable membrane?
56: What happens during photosynthesis?
a: Cell uses energy in sunlight to make food.
b:Cells uses energy in sunlight to make carbondioxide.
57: How are photosynthesis and respirattion related?
a:Same equations
b:Opposite equations
Warm up # 19:
58:Mitosis is the stage during which
a: Cell divides into two new cells
b: cells nucleus divides into 2 new nuclei
59: Each rung of the DNA ladder is made up of:
a:single nitrogen base
b:pair of nitrogen bases.