6. Red blood cells are made in the marrow. What two systems are

involved in the production of red blood cells?

endocrine and nervous systems

O circulatory and skeletal systems

nervous and skeletal systems

O circulatory and immune systems

Inbreeding produces organisms that are genetically very similar because

What do transformers do in the generation and distribution of electrical energy? Check all that apply.

Why are there macromolecules considered to be organic?

Kangaroos are: a. placental mammals c. monotremes b. marsupials d. echidnas

Nitrogen-fixing bacteria A. repair nitrogen-damaged legume roots B. convert atmospheric nitrogen into ammonia C. damage the environment by using atmospheric oxygen to produce toxic nitrogen compounds D. convert ammonia in the soil into nitrogen gas

What is relative concentration of water in hypotonic solution?

How do scientists use fossils to study earth history

When does a baby's umbilical cord fall off?

Why might lower folic acid (a precursor to Tetrahydrofolate) levels in pregnant women lead to arn increased risk of birth defects for the baby?

When the body cells are hypotonic to the blood plasma, water will move from intracellular fluid to extracellular fluid?