What is shown in this illustration?

A) sister chromatids with different genes

B) homologous chromosomes with homozygous alleles

C) homologous chromosomes with heterozygous alleles

D) heterozygous chromosomes with homozygous alleles

How might upward growth of cities be better than outward growth

What type of cellular transport do they use for large molecules? what features of the cell membrane permit it?

Feather color in budgies is determined by two different genes Y and B. YYBB, YyBB, or YYBb is green; yyBB or yyBb is blue; YYbb or Yybb is yellow; and yybb is white. Two blue budgies were crossed.

At the start of photosynthesis, energy is in the form of sunlight. where is the energy at the end of photosynthesis?

When a scientist is conducting research about all the plants and wildelife in the mojave desert as well as the deserts resources, such as water and soil the scientist is studying A: A community B: A population C: A species D: An ecosystem

How many times do the nostrils of a frog open and close in one minute

What regulates the enzymes present in an organism A. Phenotype B. Genotype C. Proteins D. Carbohydrates

What is the importance of the excretory system?

What are four sources of minerals?

How many organisms depend on the squid as a source of food?