Answer:
Sponges are the members of the phylum Porifera. They have cellular level of body organization and they are sedentary. The space, food and other resources are limited. This leads to lot of competition for space among the sponges. Some of the sponges produce toxins to stop other sponges from settling down nearby or very close to another one. Toxins secreted by sponges provide a competitive advantage.
Answer:
The genetic code only consists of 4 letters of A T C and G. That means it is a VERY simple language. Combinations of three of these letters (codons) are translated into functional information in the form of amino acids. Each three letters = one amino acid.
Although the code seems simple, the information that can be derived from it is highly complex, making an entire organisms.
Take for example a simple 4 letter sequence of letters. ACTG, AGTC, AATG, etc. There are 256 potential combinations, just in a sequence of 4. Imagine in humans where there are THREE BILLION letters! The possible combinations are essentially endless.
Answer: Membrane proteins act as receptors to molecules like hormones.
Explanation:
Membrane proteins are proteins that are closely associated with a cell membrane. On the cell membrane, they could act as receptors to molecules like hormones that need to be transported across the hydrophobic lipid bilayer.
A good example of membrane proteins is sodium channel, that acts as receptor to neurotransmitters.
Sediment - rock that has formed from sediment deposited by water or air
Deposition - the geological process in which sediments, soil and rocks are added to a landform or land mass
Environment - the surroundings or conditions in which a person, animal, or plant lives or operates
