How does the structure of the stigma aid in pollination?
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Final answer:
The structure of the stigma aids in pollination by being specifically designed to capture and trap pollen. It is sticky or feathery, allowing it to collect pollen efficiently when a pollinator visits the flower. The specific structure also helps prevent pollination from different species, thus maintaining species purity.
Explanation:
The structure of the stigma greatly aids in pollination because it is specifically designed to capture and trap pollen. The stigma is the top part of a flower's carpel, and it has a sticky or feathery surface that enables it to collect pollen efficiently. When a bee or another pollinator visits a flower, the pollen sticks to its body and is transferred to the stigma of the next flower it visits. This transfer process, facilitated by the structure of the stigma, is known as cross-pollination.
The precision of the stigma's structure in different species also aids in the prevention of unwanted pollination from different species, helping in maintaining the purity of the species. Thus, the structure of the stigma plays a crucial role in the plant reproduction process.
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Insulin's action on blood sugar levels helps maintain a dynamic balance. Therefore, the correct option is B.
The pancreas secretes the hormone insulin, which is essential for controlling blood sugar levels. Insulin is released into the bloodstream when blood sugar levels rise, as they do after a meal. Insulin aids in the maintenance of dynamic equilibrium by encouraging the uptake of glucose from the blood into cells, where it can be used as an energy source or stored for later use.
Therefore, the correct option is B.
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✭The Hominini, or hominins, form a taxonomic tribe of the subfamily Homininae ("hominines"). Hominini includes the extant genera Homo (humans) and Pan (Chimpanzees and Bonobos), but excludes the genus Gorilla (gorillas).
✭The term was originally introduced by John Edward Gray (1824), long before any details on the speciation of Pan and Homo were known. Gray's tribe Hominini by definition includes both Pan and Homo. This definition is still adhered to in the proposal by Mann and Weiss (1996), which divides Hominini into three subtribes, Panina (containing Pan), Hominina ("homininans", containing Homo "humans"), and Australopithecina (containing several extinct "australopithecine" genera).
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a primate of a taxonomic tribe ( Hominini ), which comprises those species regarded as human, directly ancestral to humans, or very closely related to humans.
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B. Behavior
C. Sanitation
D. Antibiotics
If the above are the choices given in this question, then my answer is D. ANTIBIOTICS.
Cleanliness of food, behavior, and sanitation are all factors that prevents the spreading of diseases.
Antibiotics are taken to combat the acquired diseases. It simply signifies the presence of a disease that needs to be eradicated from the system.
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In chemistry and quantum mechanics, an orbital is a mathematical function that describes the wave-like behavior of an electron, electron pair, or (less commonly) nucleons. An orbital may also be called an atomic orbital or electron orbital.
Explanation:
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The adrenal gland sits atop each kidney
What is the adrenal gland
The adrenal glands are small, triangular-shaped endocrine glands located on top of each kidney. They are composed of two parts: the outer adrenal cortex and the inner adrenal medulla.
The adrenal glands play a crucial role in producing and releasing various hormones that are essential for regulating metabolism, responding to stress, maintaining fluid balance, controlling blood pressure, and supporting immune function.
The hormones produced by the adrenal glands include cortisol, aldosterone, adrenaline (epinephrine), and noradrenaline (norepinephrine).
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