Help me with these 3 questions please Which one does use energy to allow certain molecule across the membrane?
a. Transporter protein
b. Protein channel
Each phospholipid has lipid tails that gives it a property and is repelled by water.
a. polar
b. non polar
Which one does not use energy to allow certain molecule across the membrane?
a. Transporter protein
b. Protein channel

Approximately what portion of the foods that we eat have been genetically modified in some way? a.fewer than 10% b.about 50% c.nearly 100%

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen

How many chromosomes are in a human gamete?