Living organisms are not created spontaneously.
Explanation:
The cell is the basic and fundamental unit of life. Cells are the basis of the organization of life and on it, complexity is built.
The cell theory was formulated around the 17th century and there are some of its postulates:
- The functioning and fundamental unit of life is the cell
- All organisms are made up of one or more cells.
- Cells are formed from pre-existing cells and are not created spontaneously.
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Answer: Living organisms need water to survive. Organisms require water to break down food molecules or generate energy during the respiration process. Water also helps many organisms regulate metabolism and dissolves compounds going into or out of the body.
5 Because of the way that the stuff goes stuff
<u>Answer</u>:- Active transport
<u>Explanation</u>:-
There are two types of membrane transports
1. Passive transport - this type of transport occurs without the input of any energy and the molecules move along the concentration gradients that is from <em>high concetration to low concentration.</em>
2. Active transport- this type of transport takes place to move the molecules against the concentration gradient that is from <em>low concentration to high concentration.</em>
<em>The active transport is of two types:</em>
1. <em>Primary active transport-</em> in this type of transport <em>ATP</em> is used as an energy source to move the substances against the concentration gradient.
2.<em>Secondary active transport</em> - in this type of transport the gradient formed by the active transport is utilized and it involves the movement of 2 substances at a time aross the membrane. That is the movement of one molecule is coupled to another.
- The membrane proteins that are associated with active transport are called as <em>carrier proteins</em>. These proteins have a binding site for the molecules that they transport. Once they bind to the specific molecules, a conformation change is induced and this leads to the transport of the molecule across the membrane.
So, the <em>active transport is basically responsible for utilizing the energy from ATP and carrier proteins to move the substances across the membrane against their concentration gradient i.e. from low concentration to high concentration.</em>
Answer is C. The greatest biomass is always the lowest level in the trophic system: phytoplankton and bacteria.
