Which sentence describes existing cells?

A.

All cells come from previously existing cells.

B.

All cells develop from the remains of other cells.

C.

All cells, once formed, continue to live forever.

D.

All the cells that are on Earth have always been here.

What factors are most important when deciding what information to use? A. It must agree with your ideas and be from secondary data. B. It must agree with your ideas and be reliable. C. It must be unbiased and verifiable. D.

What are two structural parts of the virus?

Explain why the process of genetic fingerprinting uses only specific short segments of dna rather than the entire genome

A geologist is studying two different rhyolite flows to determine if they were erupted at the same time. 9) Rhyolite #1 has 50% of the parent Isotope F remaining. How many half lives have occurred? 10) Rhyolite #2 has 75% Daughter G and 25% parent H.

Okay consider a cross of beetles with exoskeleton allies B and b and leg size alleles N and n. the male parent is heterozygous in both traits. the females parent is homozygous recessive in both traits

The genes on a chromosome were represented as abcdefgh. after chromosomal breakage the order was found to be abcefgh. which type of change has occurred in chromosomal structure

The failure of homologous chromosomes to separate during meiosis is called a. skin disorders b. translocation. c. nondisjunction. d. Down syndrome.

As the wavelength increases, the frequency (A) decreases and energy decreases. (B) increases and energy increases. (C) decreases and energy increases. (D) increases and energy decreases.

The most obvious source of gene flow into any population is A) Emigration B) Immigration

Polypeptides and proteins must fold properly to be functional. Hydrogen bonds between the oxygen and nitrogen atoms of the peptide bonds are crucial to which level of protein structure?1. primary structure2. tertiary structure3. secondary structure4.