The answer is; a) they are naturally occurring.
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Answer:
The cells belong to the tissue level of organization
Explanation:
Living organisms are composed of four levels of organization; the cell, tissues, organs and organ systems.
The cell is the basic unit of life and the smallest level of organization.
Tissues are group of cells with a common origin which work together to perform a similar function.
Organs are composed of different types of tissues and perform various complex functions. in the organism.
Organ systems are groups of organs that perform similar functions or which work together for a specific function.
A plant leaf is an organ which is made up of various tissues such as the dermal, vascular and ground tissues.
The dermal cells known as the epidermis belong to the tissue level of organization as they perform a similar function of protecting against mechanical injury and invasion by microorganisms
Answer:
Sharks, in their basal form have been on Earth for hundreds of millions of years. They were the first to develop a stream-like, torpedo shaped body and created a niche for themselves. Their aerodynamic body shape has evolved to allow for efficient and dynamic movement in water. Having a cartilage instead of bones allowed them to grow large and still be relatively light and buoyant . After they've evolved flexible, protruding jaws, there wasn't much to change. They were able to adapt and exploit all the water habitats as the world was changing.
Explanation:
