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| Every living organism is composed of one or more ____________________. |
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| The sum of all chemical reactions carried out in an organism is ____________________. |
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| An educated guess, or ____________________, may be tested by experimentation. |
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| Substances with a pH lower than 7 are ____________________. |
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| Substances with a pH greater than 7 are ____________________. |
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| The starting materials for chemical reactions are called ____________________, while the new substances that are formed are called ____________________. |
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| The basic unit of structure and function in an organism is the ____________________. |
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| A cell with a well-defined nucleus surrounded by a nuclear envelope is a(n) ____________________ cell. |
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| The ____________________ houses a cell’s DNA, which contains heredity information |
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| The random motion of particles of a substance that causes the substance to move from an area of high concentration to an area of lower concentration is called ____________________. |
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| Substances always flow from an area of high concentration to an area of ____________________ concentration. |
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| If a cell is placed in a(n) ____________________ solution, water will flow out of the cell. |
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| If a cell is placed in a(n) ____________________ solution, water will flow into the cell. |
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| Active transport requires the use of ____________________ by a cell. |
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| Refer to the illustration 11. The process shown in figure B is called ____________________. |
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| Refer to the illustration 11. Cells often engulf extracellular particles and fluid, as shown in figure A. This is called ____________________. |
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| The DNA in eukaryotic cells is packaged into structures that are called ____________________. |
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| A(n) ____________________ is a segment of a DNA molecule that carries the instructions for producing a specific trait. |
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| The X and Y chromosomes are called the ____________________ chromosomes |
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| A fertilized egg cell is called a(n) ____________________. |
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| The diploid number of chromosomes is re-established through ____________________. |
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| A picture of a cell’s chromosomes is called a(n) ____________________. |
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| The cells resulting from meiosis in either males or females are called ____________________. |
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| The process called ____________________ guarantees that the number of chromosomes in gametes is half the number of chromosomes in body cells. |
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| The four haploid cells formed in the male at the end of meiosis 2 develop a tail and are called ____________________. |
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| An individual produced by asexual reproduction that is genetically identical to its parent is called a(n) ____________________. |
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| The process in which sperm and egg cells join is called ____________________. |
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| The patterns that Mendel discovered form the basis of ____________________, the branch of biology that deals with heredity. |
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| Different forms of a particular gene are called ____________________. |
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| An organism's ____________________ refers to the set of alleles it has inherited. |
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| The external appearance of an organism as determined by what alleles are present is ____________________. |
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| A trait that is determined by a gene that is only found on the X chromosome is said to be ____________________-____________________. |
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| Identifying patterns of inheritance within a family over several generations is possible by studying a diagram called a(n) ____________________. |
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| A change in an organism's DNA is called a(n) ____________________. |
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| A genetic disorder resulting in defective blood clotting is ____________________. |
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| The name of the five-carbon sugar that makes up a part of the backbone of molecules of DNA is ____________________. |
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| Watson and Crick determined that DNA molecules have the shape of a(n) ____________________ ____________________. |
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| The process by which DNA copies itself is called ____________________. |
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| The sequence of three nucleotides that code for specific amino acids or stop signals in the synthesis of protein is called a(n) ____________________. |
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| The information contained in a molecule of messenger RNA is used to make protein during the process of ____________________. |
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| A change in species over time is called ____________________. |
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| Published in 1859, Charles Darwin’s book, ____________________ ____________________ ____________________ ____________________, changed biology forever. |
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| A species that has disappeared permanently is said to be ____________________. |
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| A DNA subunit composed of a phosphate group, a five-carbon sugar, and a nitrogen-containing base is called a(n) ____________________. |
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| Due to the strict pairing of nitrogen bases in DNA molecules, the two strands are said to be ____________________ to each other. |
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