no ,geologist wear golden eye glass.its not gold ore
Answer:
I would say B, but I'm not completely sure sorry :(
The correct answer for the given statement above would be option D. The statement that correctly answers whether the question of alien life on the moon is scientific is, the question is scientific because it is testable and verifiable. Testable and verifiable in a way that it is possible to conduct tests or experiments to prove whether the given claim is true or not. A scientific statement is based on objectivity. As long as it is not based on personal interests, values, community bias or personal perspectives, it is considered as a scientific statement.
Answer:
Cellular membranes or plasma membranes has many functions. Some of these include regulation of cellular transport, and responding to cellular signals or hormones.
<h2>Cellular Transport</h2>
The plasma membrane is made up of the <u>phospholipid bilayer with embedded transmembrane proteins</u>. This makes the cell membrane <u>semi-permeable</u>. Movements of substances depend on the composition of the molecules e.g. glucose and amino acids, as needed by the pancreatic cells. These are larger and uncharged molecules and can't pass freely through the membrane so they utilize the transmembrane proteins via attaching to carrier proteins. This is called <em>passive transport</em>. On the other hand, in <em>active transport</em>, <u>ATP is used</u> to transfer molecules, like Hydrogen, from a low to high electrochemical gradient.
Other kinds of cellular transport are:
- Osmosis and diffusion
- Endocytosis
- Exocytosis
<h2>Cellular Signalling</h2>
The cell membrane is able to signal other neighboring cells by utilizing complex proteins. These proteins may take form as receptors or markers.
<h3>Membrane Receptors</h3>
They act as receivers of extracellular signals and spark intracellular processes. These receive signals from hormones, growth factors, etc.
<h3>
Membrane Markers </h3>
These allow the cells to identify each other and respond if this cell is needs further development as in organ development, or a foreign body to the system.
Every organism in an ecosystem relies on other species for survival: Species diversity. An ecosystem is a b<span>iological community of interacting organisms and their physical environment. The survival of one species therefore depends on the survival of other species.</span><span>
Reduced options for mates can lead to inbreeding: Genetic diversity. Inbreeding occurs when closely related individuals breed, and this can lead to the expression of undesirable traits such as those associated with recessive genes.
Decreased diversity can lead to increased susceptibility to disease: Genetic diversity. This is related to inbreeding. The expression of recessive genes can decrease the overall fitness of a species and increase its susceptibility to disease.
The loss of a producer could result in the loss of consumers: Species diversity. This is related to the concept of an ecosystem. Consumers rely on producers as a food source.
When a population becomes small, diversity is lost: Genetic diversity. This is commonly known as the 'founder effect'.</span>
