Answer:
Carotenoid, any of a group of non nitrogenous yellow, orange, or red pigments (bio chromes) that are almost universally distributed in living things. There are two major types: the hydrocarbon class, or carotene, and the oxygenated (alcoholic) class, or xanthophylls. Synthesized by bacteria, fungi, lower algae, and green plants, carotenoids are most conspicuous in the petals, pollen, and fruit (ex: carrots, sweet potatoes, tomatoes, and citrus fruits) of the flowering plants.
Explanation:
It is because of the different neurotransmitters and their receptors.
Sympathetic stimulation of arterioles in skeletal muscle is mediated by epinephrine acting on its β-adrenergic receptors.
Sympathetic stimulation of vasoconstriction occurs as a result of activation of α-1 adrenergic receptors by norepinephrine released by post-ganglionic sympathetic neurons.
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For all organisms to survive, they start off with sunlight. That's the main and immediate source of energy to any organism(s).
Sunlight gives warmth and energy and light of course.
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Answer:
Since cell division occurs twice during meiosis, one starting cell can produce four gametes (eggs or sperm). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase
Explanation:
Answer:
If we are watching the sky, we see the lightning before we hear the thunder. That is because light travels much faster than sound waves. We can estimate the distance of the lightning by counting how many seconds it takes until we hear the thunder. It takes approximately 5 seconds for the sound to travel 1 mile.
Explanation:
