Answer:
See explanation below.
Explanation:
Starfish, also known as sea stars, are marine organisms that belong to the Class Asteroidea. They are considered invertebrates because they lack a vertebral column. Moreover, most starfish species have five arms but some species can have up to 15!
Here are some characteristics that differentiate starfish from other organisms and make them so unique:
- Possession of tube feet.
- Most species have pedicellaria, claw-shaped structures with movable jaws.
- Radial symmetry
- They can possess from 5 to 15 arms.
- Do not possess brain.
- They can regenerate parts of their body.
Answer:
The correct answer is A.
Explanation:
Researchers have found that there is more dopamine in the brain of people with Schizophrenia. Dopamine is a neurotransmitter used by the brain cells or <u>neurons</u>, to send messages between each other. Other neurotransmitters like serotonin have also been associated with this disease.
A deciduous forest ecosystem is the <span>type of ecosystem that existed in the copper basin area before mining began.</span> This type of ecosystem is characterized with <span> trees that lose their leaves each year. They are found in areas with warm moist summers and cool winters. With the mining the trees were lost.
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<span>This behavior is an example of B. overproduction. The frog lays thousands of eggs, which is much more than it needs, or would need in perfect conditions. However, most of those eggs doesn't survive, and little frogs are never born in that case. This is why it has to have a lot of eggs so as to ensure that a decent number of offspring survives so as to continue the species.</span>
