Which statement is true about lethal genes?

a) they cannot be maintained in the gene pool because they are always dominant.

b) they can be maintained in a gene pool by heterozygous carriers when the allele is recessive and the individuals reproduce.

c) they can be maintained in a gene pool if the allele is expressed before reproductive age.

Every compound can be represented by a chemical formula. a chemical formula is the set of symbols showing the elements that make up a compound and their proportions. water’s chemical formula is h 2 2 o. that means a molecule of water contains two atoms of hydrogen and one atom of oxygen chemically bonded. a molecule is a group of two or more atoms bonded together. molecules can range in size from two to thousands of atoms. a molecule of a compound is the smallest unit of that compound. every molecule of water has all the physical and chemical properties of water. that’s because every molecule of water is made of the same elements in the same proportions: two hydrogen atoms and one oxygen! which of the following is a true statement? a every molecule of the same compound will have different properties. b every molecule of a compound has the same proportion of elements. c molecules can be physically separated into smaller units of a compound. d molecules cannot be represented by chemical formulae.

Which part of cellular respiration must occur before any of the other steps can occur

Individuals do not compete directly for resources, but are prey for the same predator