In humans the X and Y chromosomes which determine the

Which parasitic protist evades the host immune system by altering its surface proteins with each generation? Paramecium caudatum Trypanosoma brucei Plasmodium falciparum Phytophthora infestans

If you exercise at an intensity of 1 liter of oxygen per minute, about how many calories would you burn in one hour?

Other than size, what are the two biggest differences between the megalodon shark and modern sharks?

Which part of the male sexual anatomy is a canal through which urine and seminal fluid leave the body?

Which of the following describes a medical drug? -- A. A bacterium that causes a human disease B. A chemical substance used to treat disease O C. A virus that is passed from person to person O D. A physiological symptom related to a sickness

What could a dog living now and a car living thousnads if years ago have in common

The process of transducing air pressure waves into neural messages that the brain interprets as meaningful sound is known as

Why does photosynthesis require water? a. because water provides oxygen atoms. b. because water provides electrons. c. because water accepts electrons. d. because water acts as a catalyst.

An education guess or rational explanation about a specific phenomenon

What are the technical name for red blood cells white blood cells and platelets?