Answer:
a There is probably life on Mars.
Explanation:
A scientific theory is basically an opinion that has not been proved or disproved yet.
All of the other options are true science-backed facts.
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<em>The future belongs to those who believe in the beauty of their dreams.</em>
<em>- Eleanor Roosevelt, Former U.S. First Lady</em>
The type of joint that allows bones to move backward and forward in only one direction is the hinge joints. Ball and socket are the joints that allows movement in all directions. Gilding joints are type of joints that are the vertebral disks that allow twisting, turning, and sliding. Hinge joints are formed between two or more bones where the bones can only move along one axis to flex or extend. They include the ankle, elbow and knee joints.
<span>A stroke can be caused by a blocked artery or the leaking of a blood vessel .</span>
Answer:
Mitochondria
Explanation:
This was the first endosymbiotic event during our primitive cell basically engulfed an aerobic bacteria which later formed into mitochondria. This is why mitochondria has its own DNA as well (called the mitochondrial DNA)
A prominent part of the reward pathway of the brain is the a) locus coeruleus located at the base of the frontal lobe.
<h3>What causes the brain's reward centre to become active?</h3>
Dopamine is a neurotransmitter that facilitates communication across the brain areas that make up the "reward system." To assess rewards and encourage humans to pursue them, dopamine-producing neurons in the ventral tegmental area (VTA) connect with neurons in the nucleus accumbens.
The hypothalamus plays a crucial role in balancing a person's desire for rewards with their physiological status. This area combines brain activity with the organism's physiological requirements.
According to studies, the most widely used substances in human misuse (such as cocaine, alcohol, nicotine, amphetamines, and opiates) trigger a neurochemical reaction that greatly raises the quantity of dopamine produced by neurons in the reward area of the brain.
Learn more about neurotransmitter refer
brainly.com/question/26387085
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