The *heart* is the main organ of the circulatory system.
The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic). The system is responsible for the flow of blood, nutrients, oxygen and other gases, and as well as hormones to and from cells.
Answer:
Phosphorus cycles between living things and the soil.
Plants absorb phosphates from the soil and turn them into organic compounds through assimilation.
Animals eat plants and pass the phosphorus through the food chain from one animal to the other.
An animal dies and decomposes, returning the phosphorus to the soil.
Explanation:
Answer:
Explanation:
. Natural selection is a pressure that causes groups of organisms to change over time. Animals inherit their genetics from their parents or ancestors, and the environment is constantly changing. So, no organism is perfectly adapted to its environment.
Answer: 50% will be purple
There’s a 50% chance the genes will be heter*zygous (Pp, purple flower) and 50% chance they will be hom*zygous recessive (pp, white flower)
Punnet square drawing attached