Please wait - loading…

Life Science 7 Final Exam


7th Grade Science Flashcards on Life Science 7 Final Exam, created by pcsalazar on 05/25/2014.
Flashcards by pcsalazar, updated more than 1 year ago
Created by pcsalazar almost 8 years ago

Resource summary

Question Answer
How do you write a question for the scientific method? How does _(IV)_ affect _(DV)_?
How do you write a hypothesis? If _______ then _______ because ____. If this happens, then that happens, because of reason.
independent variable the variable that is changed in the experiment
dependent variable variable that responds to the change made to the independent variable
controlled variable variables that remain constant in the experiment; not be a fair test if two variables are changing at the same time
control the normal or standard to compare other things to
constants the variables that do not change
metric system the decimal measuring system based on the meter, liter, or gram as units
cell membrane a layer of tissue that surrounds the cell lets good chemicals in and keeps bad chemicals out
cytoplasm jelly-like substance within the plasma membrane
endoplasmic reticulum ER passageways where proteins and chemicals are made; smooth ER carries the proteins to parts of the cell; rough ER makes the protiens
Golgi Body stack of membranes that package chemicals
Nucleus controls the activity of the cell; and houses the DNA
nucleolus makes ribosomes
cell wall provides protection and support for plant cells and allows water, oxygen, and carbon dioxide to move into and out of a cell
chloroplasts makes food for plant cells during photosynthesis
vacuoles stores and transports food, water, and waste in animal cells single large one in the plant cell and stores large amounts of food
Mitochondria breaks down sugar molecules to release energy; where cellular respiration occurs
ribosomes synthesize protiens
centrioles this organelle separates chromosome pairs during mitosis
cell theory (1) Cells are the basic unit of structure and function in all living things
cell theory (2) All living things are made of cells
cell theory (3) All cells come from existing cells
microscope parts 1. body tube 2. rotating nose-piece 3. medium power objective lens 4. low-power objective lens 5. high power objective lens 6. stage clips 7. diaphragm 8. mirror 9. eyepiece 10. arm 11. stage 12. coarse adjustment knob 13. fine adjustment knon 14. base
chromosomes contain genes and DNA
sister chromatids one strand of a chromosome
chromatin the spaghetti like substance that form into chromosomes during mitosis
genes basic unit of heredity
traits a quality or characteristic of an individual
Mitosis cell division
prophase the nuclear membrane and nucleolus disappear; centrioles begin to move to opposite ends of the cell; spindle fibers form between the poles
metaphase Chromatids attach to the spindle fibers and move to the middle of the cell
anaphase sister chromatids separate and begin to move to opposite ends of the cell
telophase cell is pinched in the middle chromosomes appear as chromatin (threads) mitosis ends
Haploid cell a cell having a single set of unpaired chromosomes.
Diploid cell a cell containing two complete sets of chromosomes, one from each parent
DNA Deoxyribonucleic acid contains the instructions for making proteins within the cell located in the nucleus of the cell
nucleotide parts Deoxyribose Phosphate nitrogenous bases
allele different form of a gene
Gregor Mendel discovered that factors/alleles are dominant or recessive; discovered that one allele from mom and dad was randomly chosen
Hybrid vs. Purebred a combo of 2 different alleles a combo of 2 of the same alleles
Dominant a trait that overpowers a recessive trait and will appear in the phenotype of the offspring if 1 parent contributes to it
Recessive a trait that is overpowered in the presence of a dominant allele must pair with a recessive allele in order to be seen
Homozygous an allele combination using 2 of the same alleles
Heterozygous an allele combination with 2 different alleles
genotype the genetic makeup of an organism
phenotype the physical appearance of an organism
Punnett Square a diagram that shows the probability of 2 parents offspring genotype
F1 Generation the first offspring generation
Incomplete dominance a type of dominance where the heterozygous condition produces a brand new phenotype
Show full summary Hide full summary


The Circulatory System
Shane Buckley
Biology B1.1 - Genes
biology 1-4
Food Chains and Food Webs Quiz
Selam H
Enzymes and Respiration
I Turner
Function and Structure of DNA
Elena Cade
The Lymphatic System
james liew
The Flowering Plant and Photosynthesis
Ecology Vocabulary
Selam H
health and diet
AQA Biology 3.3 Structure of an epithelial cell
Charlotte Hewson