Answer:
Either a vacuole or a chloroplast
Explanation:
Chloroplasts are the site of photosynthesis and animal cells do NOT photosynthesise
Vacuole stores the cell sap in the plant cell
Enzymes are catalysts that speed up chemical reactions in the human body.
<h3>What do you mean by Catalysts?</h3>
Catalysts may be defined as those substances that enhance the rate of chemical reactions without being consumed in them.
Enzymes are also considered as catalysts in the body of living organisms. Basically, enzymes are proteins that assist in the speeding up of any chemical reaction in living entities.
Therefore, enzymes are catalysts that speed up chemical reactions in the human body.
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The term Neurotransmitter describes the chemical substances that make it possible for messages to cross from the synapse of a neuron to the target receptor.
<h3>What are Neurotransmitters?</h3>
- Neurotransmitters are endogenous chemicals that allow neurons to communicate with each other throughout the body.
- Chemical synaptic transmission is primarily through the release of neurotransmitters from presynaptic neural cells to postsynaptic receptors.
- There are a number of neurotransmitters used by the body for different functions, including acetylcholine, norepinephrine, glutamate, GABA, glycine, dopamine, and serotonin.
- Glutamate is the principal excitatory neurotransmitter used in the brain.
- GABA and Glycine serve as the major inhibitory neurotransmitters.
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Answer:
The correct answer would be C. The tortoises provided evidence that different species have adaptations suited to their particular environments.
Darwin observed that how different environment on different island lead to the development of different species as a result of adaptations and natural selection.
For example, tortoise inhabiting well-watered islands which used to have short and cropped vegetation had developed a dome-shaped shell.
In contrast, the tortoise inhabiting the arid islands had developed saddle-shaped shells. It is because they needed to stretch their necks in order to reach branches of cactus and other vegetation available in the area.
Consequently, they developed long necks and high peak to the front edges of their shells. It made it possible for them to stretch their heads vertically.
