Answer:
Maybe 2,3 points
Explanation:
1. receive stimuli messages from inside and outside the body..
2. responding to stimuli by sending messages throughout the body.
Starvation.
Disease.
Weather.
Lack of mate.
Offspring dying.
Hunting.<span />
Answer:
Offspring of a horse and donkey are unable to reproduce.
Explanation:
The biological concept of species states that:
A species is a group of organism with similar characteristics, that can interbreed and have a fertile offspring.
Horse + donkey = mule. A mule is a hybrid and is not fertile.
A bio-molecule is a chemical molecule that naturally occurs in living
organisms. Bio-molecules consist primarily of carbon and hydrogen, along
with nitrogen, oxygen, phosphorus and sulfur.
The four types of bio-molecules are carbohydrates, proteins, lipids and nucleic acids.
Enzymes are constructed from chains of amino acids and go through the usual four stages of protein assembly.
Enzymes are proteins.