Answer:
Tissue - cardiac muscle
Organ -heart
Organ system - circulatory system
Organism*addition- human body
Explanation:
Answer:
Single-celled organism are not classified as an animal because animals are multicellular organisms i. e. made of more than one cell while single celled organisms are unicellular organisms i. e. made of one cell. In single celled organisms, one cell perform all activities while in animals special cells are responsible for particular function. There are some single celled organisms are autotrophic while animals are heterotrophic in nature.
They are all layers of the earth
Is there anything specific that you need or just any types of antibiotics??