Where in the stem cell of an embryo are the instructions located for how to build the heart
a- amino acids
b-mitochondria
c-endoplasmic reticulum
d-deoxyribonucleic acid
apex

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

Name one similarity and one difference between the morphology of a brachiopod and a bivalve

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.