Answer:
Big Bang, the universe is still expanding. Slowly the planets get further away from each other. It's the third planet from the sun, some believed that the earth was in the center of the universe and now we believe the sun is in the middle.Explanation:
The element that is likely to form a ionic bond with potassium is Cl (answer A)
<em><u>Explanation</u></em>
Ionic bond - is a bond formed when a metal and a non metal react.
Metal loses electron ( donate electrons) while non metal gains electrons ( accept electrons) to form ionic bond.
potassium is a metal while Chlorine(Cl) is a non metal. They react to form an ionic bond by potassium donating 1 electron while chlorine accept 1 electron.
Answer:
e. staphylococcal enterotoxin
Explanation:
Staphylococcal enterotoxin is a toxin that is produced by the bacteria Staphylococcus aureus. It is a toxin found inside the gastrointestinal tracts of the human body which is why it is called an enterotoxin and it results in food poisoning when consumed by humans.
Staphylococcal enterotoxin is proteinous in nature and it can be found on dairy products such as milk or cheeses that have been contaminated by Staphylococcus aureus.
After consumption of the contaminated milk or cheeses, the person begins to experience symptoms of nausea, diarrhea as well as vomiting.
Staphylococcal enterotoxin is a very heat stable toxin which means even though you heat up a food contaminated with this toxin, the bacteria may die by the toxins would still remain in the food.
The best way to avoid food poisoning by Staphylococcal enterotoxin is to avoid eating contaminated foods.
Answer:
1. Signaling molecule
2. Signaling receptors
Explanation:
Hormones, growth factors, neurotransmitters, etc. serve the function of signaling molecules for cells. These molecules are released by one cell and bind to the receptors present on/in the target cells to elicit the desired response. Thereby, the signaling molecules serve in cell-cell communication.
For example, insulin hormone synthesized and released from beta cells of pancreas binds to its cell surface receptors present on the surfaces of liver cells and muscle cells to stimulate the uptake of the glucose from the blood.
Likewise, neurotransmitters released from the presynaptic neuron bind to receptors present on the membrane of postsynaptic neuron and serve to carry the nerve impulse to the postsynaptic neuron.
Answer:
The outcome of cell‐lineage competition is likely to depend, among other factors, on the initial number of cells involved. Mosaicism generally starts as one or a small group of mutant cells while chimerism generally involves a more massive input of genetically different cells
Explanation:
