What causes Down syndrome?

a deletion

antibiotics

a substitution

nondisjunction

A biochemist isolate, purifies, and combines in a test tube a variety of molecules needed for dna replication.

Two or more atoms held together by covalent bonds. Not necessarily a compound. A. Cellulose B. Molecule C. Glycogen D. Electron

Which parts of the body assessed by the nurse would confirm a diagnosis of frostbite? select all that apply?

Explain how messages travel to and from the brain through the nervous system is it through Neurotransmitters and hormones?

Which statement describes an operon? heritable changes in gene expression that occur without altering the DNA sequence the processing of exons in mRNA that results in a single gene coding for multiple proteins a gene cluster controlled by a single

Kate is protesting the construction of a new manufacturing plant in her town. She sees the value in more jobs, but she is an advocate of sustainable development. What is her primary concern? A. cost B. location C. increased risk of pollution D.

What 4 structures do all vertebrate embryos initially have?

Select the benefits of reproduction by meiosis. Organisms can reproduce rapidly. Genetic variation occurs. Mutations are not copied over and over again. Genetically identical copies of parents can be made.

What is law according to science

Why is DNA important to a cell?