All the body parts receive oxygen-rich blood through

A) veins

(B) haemoglobin

C) RBC's

(D) none of these

Why is the sky blue and plants green. WHY OK.

Identify one fuel source in the table that is considered a fossilfuel

Genetic drift occurs when a population of organisms which normally don't travel great distances, like fruit flies, floats on a tree branch or piece of fruit across an ocean barrier to colonize a new location. TrueFalse

Select the correct answer. Richard reads 28.9 inches of mercury on a barometer, which is 1 inch lower than normal atmospheric pressure. The temperature is 40°F. What type of weather is most likely to occur where Richard is? A fair and dry B.

In order for an object to change its motion, what must happen?

Which of the following components is NOT part of the modern cell theory? A) All cells arise from preexisting cells. B) Bacteria are examples of eukaryotic cells. C) All living organisms are made up of one or more cells.

A person who has a weakened immune system may not be able to fight against infection because pathogens may enter the body and cause illness. phagocytes many enter the body and cause illness. normal cells crowd out unhealthy cells.

What happens when a magnesium ion is attracted to a chlorine ion? O A. They form a covalent bond. B. They form an ionic compound. O C. They share electrons. O D. They form a gas.

The cytoplasmic membrane is termed "semi-permeable" because some substances, like water and alcohols, can pass freely through while others, like sugars, amino acids, and ions, cannot.

How to save the amazon?