Give a scientific explanation for the reason that humans live together.

2 answers:

6 0

There are more than one scientific explanation of how humans were created. The most scientific one is from organisms. Sincere we’re made on earth, our bodies need specific things such as water, and most importantly oxygen. These important things are not found on every planet and the planets the do exist on, (my dad said there are planets that we can survive on) we can not get there. Since we can’t get there, we must all live on the same planet, help each other and live together.

Hope this helps and hope you have a great day

Lyrx [107]4 years ago

5 0

Cause we are all related just like the apes we evolved from

Please Give brainiest

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Each presynaptic terminal contains ___________, which contain the neurotransmitter __________ that, when released, cause ligand-

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Answer:

The correct answers are: Neurotransmitter Vesicles, Acetylcholine, Contraction.

Explanation:

At the neuro-muscular junction, impulses are transmitted in the following manner:

The impulse is carried by an action potential (variable opening and closing of different ion channels located on the membrane of the neurons allowing variable ion movement) to the neuron at the neuro-muscular junction.
The action potential causes the opening of the voltage dependent calcium channels in the axon terminal of the neuron allowing the entry of calcium ions.
This causes the neurotransmitter vesicles containing the neurotransmitter acetylcholine to fuse with the pre-synaptic membrane.
Acetylcholine is released by the method of exocytosis into the synaptic cleft.
The acetylcholine molecules bind to the the cognate receptors present in the membrane of the muscle cell (sarcolemma).
This causes the flow of sodium ions into and potassium ions out of the muscle cell, which generates action potential in the muscle cell.
This action potential causes the muscle cell to contract.

7 0

4 years ago

In a paternity case, a woman (blood type O) claims a man (type A) whose mother is O to be the father of her

tangare [24]

Answer:

Yes, the mother's claim might be correct.

Please find the genotype of the parents and the cross below

Explanation:

Blood group in humans is controlled by three alleles namely; iA, iB, and i. Alleles iA and iB are dominant over allele i but co-dominant when together i.e. iAiB

Based on this, below are the blood types of an individual with the possible genotype;

Blood type A - iAiA or iAi

Blood type B - iBiB or iBi

Blood type AB - iAiB

Blood type O - ii

According to this question involving a paternity case, a woman with blood type O claims a man with blood type A whose mother is type O to be the father of her child. The woman has a genotype 'ii' while the man has a heterozygous genotype 'iAi' because his mother will contribute the 'i' allele.

Hence, using the genotype of the woman (ii) and man (iAi) in a cross as follows; ii × iAi (see attached image for punnet square), the following proportion of offsprings will likely be produced:

(2) iAi - blood type A

(2) ii - blood type O

Therefore, the woman's claim that the man is the father of her child with blood type O (ii) is most likely correct.