A crystal is always ...

A. a hexagon

B. a cube

C. a liquid

D. none of these

The order of rock layers are used to determine this. It can tell scientists the order of the rock layers and events but not the exact time the fossils were formed. Absolute Dating Relative Dating Radioactive Dating

What is the result of a substitution mutation? The new amino acid is always the same as the original amino acid. The new amino acid is always different from the original amino acid.

Which of these processes are necessary for roots to be able to take up water and minerals? a. Passive transport and diffusion b. Active transport and osmosis c. Respiration and evaporation

What do all living things need to be living.

Electricity generated from burning garbage in an incinerator is an example of A) hydroelectricity B) geothermal energy C) biomass energy D) solar energy

A physician may be virtuous (kind, just, and honest) and still not know:

What is true of all eukaryotes? i need it asap

True or false: A beach that has an abundant sand supply is said to be a "healthy" beach.

5. Tay-Sachs disease is caused by a recessive allele. The frequency of this allele is 0.1 in a population of 3600 people. What is the frequency of the dominant allele, and how many of the 3600 people will be heterozygous for the condition

A male adolescent asks the nurse, "how will i know if i'm going through puberty?" the nurse discusses physical changes that usually occur, the first change being: