Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Unit 12-1 Review

QuestionAnswer
_________________ are the basic unit of structure and function for all living organisms. Cells
What are the two major parts that a plant cell has that an animal cell does not? cell wall and chloroplasts
The ____________________ system creates offspring. reproductive
The ___________________ system produces hormones. endocrine
The ___________________ system fights diseases. immune
The ________________ system removes wastes and regulates water. excretory
The _______________ system takes in oxygen and removes carbon dioxide. respiratory
The ________________ system breaks down and absorbs food. digestive
The _______________ system supports and protects the body. skeletal
The ________________ system enables movement. muscular
The _________________ system processes information and directs the body's functions. nervous
The _________________ system transports materials to cells and removes materials from cells. cardiovascular
________________ reproduction involves 2 parents. sexual
________________ reproduction involves 1 parent. asexual
__________________ organisms are made of one cell. unicellular
___________________ organisms are made of multiple cells. multicellular
Organisms that make their own food are called __________________. autotrophs
Organisms that consume their own food are called __________________. heterotrophs
A __________________ is an organism whose cells do NOT contain a nucleus. prokaryote
A _________________ is an organism whose cells DO contain a nucleus. eukaryote
________________ is the scientific study of how living things are classified. taxonomy
A ___________ ______ is a step-by-step guide that helps to identify the scientific name of organisms. dichotomous key
A _______________ allele is noted by a capital letter. dominant
A ________________ allele is noted by a lowercase letter. recessive
TT is two _______________ alleles. dominant
Tt is one _____________ allele and one _______________ allele. dominant; recessive
tt is two _______________ alleles. recessive
An organism's _________________ is its physical appearance. phenotype
An organism's _________________ is its genetic makeup. genotype
An organism is ________________ when it has two identical alleles for a trait. homozygous
An organism is ________________ when it has two different alleles for a trait. heterozygous
According to the _________________________, genes are carried from parents to offspring on chromosomes. chromosome theory of inheritance
Human body cells contain ______ pairs, or 46 total chromosomes. 23
Mitosis occurs in _______________ cells. body
Mitosis produces ______ new cells with each containing _________ chromosomes. 2; 46
Meiosis occurs in __________ cells. sex
Meiosis produces _____ new cells with each containing _____ chromosomes. 4; 23
What 4 bases make up DNA? adenine, cytosine, thymine, guanine
What 4 bases make up RNA? adenine, cytosine, guanine, uracil
Created by: lschramme