| A | B |
|---|
| A group of organs working together to perform a certain function. | Organ system |
| Groups of similar cells that do the same sort of work. | Tissues |
| Materials enter and leave the nucleus through openings in this. | Membrane |
| This is used to move substances through a membrane during active transport. | Energy |
| Passive transport of water through a membrane. | Osmosis |
| Some things are able to enter and leave, but others are not. | Selectively permeable |
| Animal cells do not have these. | Cell walls/plates |
| A period of growth in which most of the cell life is spent. | Interphase |
| The code contained in the chromosomes in the nucleus of a cell. | DNA |
| A cell that has two of every kind of chromosome. | Diploid |
| Where haploid numbers of chromosomes are usually found in an organism. | Sex cells |
| Each human skin cell has this many pairs of chromosomes. | 23 |
| When a body part regrows and may form a new organism. | Regeneration |
| A Punnett square shows you all the ways in which these can combine. | Alleles |
| What Mendel called plants that received different alleles for a trait from each parent. | Hybrids |
| In a Punnett square, a capital letter stands for this type of allele. | Dominant |
| By comparing this, scientists can tell whether organisms are closely related. | DNA |
| Sex cells from female reproductive organs. | Eggs |
| Sex cells from male reproductive organs. | Sperm |
| A process that takes place only in reproductive organs. | Meiosis |
| A cell that forms in fertilization. | Zygote |
| The joining of two sex cells. | Fertilization |
| A process that takes place in body cells. | Mitosis |
| Organisms with two different alleles for a trait. | Heterozygous |
| When an intermediate form is expressed in offspring. | Incomplete dominance |
| When more than two alleles control a trait. | Multiple alleles |
| The physical appearance of an organism. | Phenotype |
| Helps determine the chance that something will occur. | Probability |
| When a group of gene pairs act together. | Polygenic Inheritance |
| The genetic makeup of an organism. | Genotype |
| Tool for tracing a trait through a family. | Pedigree |
| A genetic tool that uses letters to represent dominant and recessive alleles. | Punnett square |
| A factor that seems to disappear. | Recessive factor |
| When there are two alleles that are exactly the same. | Homozygous |
| A factor that covers up another factor. | Dominant factor |
| The different forms a gene has for a trait. | Alleles |
| The passing on of traits from parents to offspring. | Heredity |
| The study of heredity. | Genetics |
| Types of moveable joints. | Ball and socket, hinge, gliding, pivot |
| How sweat glands help the body. | Release water and salt & help to cool the body down |
| Give shape & support; Protect interior organs; Produce blood cells; Store minerals; Attach to muscles for movement. | Functions of the skeletal system |
| Striated muscles. | Cardiac & Skeletal |
| Non-striated muscles. | Smooth |
| Cells of the epidermis. | They are constantly rubbing off, dying off and being replaced |
| Prevents injury; Prevents water loss; Helps regulate body temperature; Helps to rid wastes. | Functions of the skin |
| The factor that changes because of the independent variable. (What we measure.) | Dependent variable in an experiment |
| Repeating the experiment to verify the results. | Repetition in an experiment |
