The inferior vena cava brings deoxygenated blood back into the heart from the lower body. For comparison, the part that directs deoxygenated blood from the upper body is the superior vena cava.
Answer:
Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. Many enzymes change shape when substrates bind.
Explanation:
I'm not sure about the flower, but I know the narrow beak makes it easier to get certain foods like worms.
A. Ribosomes
Ribosomes bind mRNA and translate into a protein. They reside in the cytoplasm and bind to the endoplasmic reticulum.
