Answer:
Osmosis is considered to be a type of
active transport.
Explanation:
Answer:
Viruses: stay the same
Infected cells: Increase
Unaffected cells: decrease
Explanation:
Answer:
1.) heterozygous 2.) hairy 3.) hh 4.) heterozygous 5.) no fur | as for 5, 6, and 7 i need more information because you can't see the guinea pig. number 6 could either be "HH" or "hh" depending on what it looks like, since it's heterozygous. The punnet square on the bottom right goes as follows, (from left to right) HH, Hh, hH, hh.
Answer:
The charges inside and outside of the neuron before receiving a stimulus are negative and positive, respectively, which corresponds to the transmembrane rest potential.
Explanation:
Neuron is the specialized cell of the nervous system in charge of transmitting electrical impulses. The generation of a nerve impulse in the form of an electric current is due to a change in the transmembrane potential.
<u>Outside the neuron cell, electrical charges are predominantly positive, and the ion with the highest concentration is sodium. In the intracellular space, a great quantity of proteins provide negative charge, and there is a predominance of potassium ions</u>. Under these conditions, the ionic channels are closed.
For this reason, a neuron at rest, before receiving a stimulus, presents positive charges on the outside and negative charges on the inside, and the membrane potential in this condition is estimated at a value of -65 mV.
Once a stimulus is produced, the ionic channels open and Na+ ions enter the cytoplasm, exchanging them for K+, which implies a change in the membrane potential which, on reaching the threshold, produces an action potential and the nerve impulse is produced.
Selective breeding is the traditional method for improving crops and livestock, such as increasing disease resistance or milk yield.
Genetic engineering is a faster way, which transplants genes for a desired characteristic into an organism. However, genetic engineering offers many potential benefits but carries the risk of unexpected harmful effects.
