Answer:
A. hairs on the back stand up when scared
Explanation:
B and C are not responses to stimuli, and D is a response to internal stimuli
Answer:
Haploid spores
Explanation:
Spores are usually haploid and unicellular and are produced by meiosis
Answer:
Every cell in the body of living organisms requires oxygen for its survival. Hemoglobin is a type of blood cell which is responsible for the transportation of oxygen and carbondioxide in the body. Hemoglobin transport carbondioxide which is produced as waste material, from the cell to the lungs and oxygen is loaded in the hemoglobin cell which take this oxygen to all cells.
Explanation:
When a substance combines with another to form a new substance