A 75 year old man need a replacement heart valve. he lives alone and cares for himself. is a mechanical or biological heart more suited for him

What natural disaster was causes by the eruption of Mount st. helens in Washington state? 1) flooding 2) a landslide 3) a wildfire 4) a tornado

The gene frequency for a dominant allele is 0.68 and the recessive allele is 0.39. What percent of the population has a homozygous recessive genotype?

The biosphere is made of different kinds of matter. Which substance is an example of inorganic matter? A. Protein B. Carbohydrate C. Sugar D. Salt

Assume a certain molecule of dna is composed of exactly 22 percent adenine. how much cytosine would you expect to find in this molecule

Do cat's go into heat?

Which degree of contusion is characterized by superficial and some deep tissue damage, mild to moderate weakness with no muscle spasm, moderate loss of function, ecchymosis and swelling, and decreased ROM?

How many chromosomes do humans have?

Pairing of homologous chromosomes in prophase of meiosis I appears to be critical for proper alignment, crossing over, and subsequent separation. This pairing is facilitated by the sharing of sequence homology between homologous chromosomes.

What does "leeward" mean?

Which lipid acts as a chemical messenger? a. adipose tissue b. cholesterol c. testosterone d. beeswax