Answer:
cholesterol.
Explanation
Options a, d, c, and e all contains amino acids units. They are therefore made up of protein structure. cholesterol contains alcohol and steroids. it belongs to the steroid lipid family unlike other options that belong to protein family.
Answer:
D
Explanation:
Lymphocytes are the second line of defence
First line of defence indiscriminately defends against all pathogens unlike secondary response which is targeted. First line of defence refers to the external body components like skin, secretions from the body in the alimentary canel
Mucus traps pathogens. Stomach acid kills pathogens
This is baby stuff tbh. But it is A. You need water to live. Food to live. Air obviously and a shelter
The correct answer is C. Artiodactyls
They've been around more than the others and have existed for some 55 million years.