Chemical pollution
Introduction to invasive species
Fishing and hunting
Destruction and fragmentation of habitats.
<u>Answer</u>: Cell
<u>Explanation</u>:
The simplest organization level in all the living organisms including humans is a cell.
All human beings are made up of a cell which forms the lowest level of the organization after which the hierarachy of the organization is as follows :
cells----> tissues----->organs----> organ systems
Therefore, the simplest level of organization in human beings is a cell.
They differentiate into three main tissue types: dermal, vascular, and ground tissue. Each plant organ (roots, stems, leaves) contains all three tissue types: Dermal tissue covers and protects the plant, and controls gas exchange and water absorption (in roots).
Answer:
B. Antibiotics attack only bacteria. OR Colds are caused by viruses.
Explanation:
A.P.E.X.