<span>The question is asking us to choose the true statement among: ?
Girls get most of their traits from their moms; boys get most of their traits from their dads. - this is not true, most traits are inherited from both parents
Male offspring will always have an X-linked genetic disease if the mom is a carrier. - this is not true, as they can inherit the non-affected gene
Fathers always determine the gender of the offspring in humans. - this is true! some spermcells carry the Y and some the X genes that determine the gender
Males never have Y chromosomes. - this is false, males always do!</span>
compacted and cemented together
brainliest please
A Nerve electrical impulse only travels in one direction. There are several reasons nerve impulses only travel in one direction. The most important is synaptic transport.
In order for a "nerve impulse" to pass from cell to cell, it must cross synaptic junctions. The nerve cells are lined up head to tail all the way down a nerve track, and are not connected, but have tiny gaps between them and the next cell. These tiny gaps are called synapses.
When you get a nerve firing, you have probably heard that it is an electrical impulse that carries the signal. This is true, but it is not electrical in the same way your wall outlet works. This is electrochemical energy. Neurotransmitters are molecules that fit like a lock and key into a specific receptor. The receptor is located on the next cell in the line. When the neurotransmitter hits the receptor on the next cell in line, it signals that cell to begin a firing as well.
This will continue all the way down the length of the nerve track. In a nutshell, a nerve firing results in a chain reaction down the nerve cell's axon, or stemlike section. Sodium (Na+) ions flow in, potassium (K+) ions flow out, and we get an electrochemical gradient flowing down the length of the cell. You can think of it as a line of gunpowder that someone lit, with the flame traveling down the length of it. Common electrical power is more like a hose full of water, and when you put pressure on one end, the water shoots out the other.
Therefore, nerve impulses cannot travel in the opposite direction, because nerve cells only have neurotransmitter storage vesicles going one way, and receptors in one place.
Antarctic soil differs from other soil because it is formed from volcanic rocks
I believe it is burning fossil fuesl
