Calcium is the most abundant mineral in the body and is essential for the development of bones and teeth. The calcium levels in the body are maintained by the thyroid gland and hormones.
These homeostatic responses are examples of:
Option D. Negative feedback
This can be explained as:
Therefore, calcitonin and parathyroid balances the calcium levels and is negative feedback.
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Answer:
positive feedback
Explanation:Because when you get motion that means its positive but if doesn't feel motion than that is negative.
responsible for producing power for the cell
tiny structures in the cell that carry out the cell's activities
responsible for digestion in the cell
found outside of the membrane
Question 23 (Multiple Choice Worth 1 points)
Which process produces two identical copies of the parent cell?
Mitosis
Meiosis
Sexual reproduction
Fertilization
Question 24 (Multiple Choice Worth 1 points)
A trait that is always expressed when this gene is present is called a
dominant trait
recessive trait
prime trait
strong trait
DNA is sometimes referred to as the blue print of the cell's information because it is the store house in which all genetic information necessary for the cell's survival and reproduction is kept.
Without DNA, there cannot be any continuation of life and no new generation of organisms. All living cells and organisms are essentially made up of protein in different forms.
B. red giant stage
C. planetary nebula stage
D. black dwarf stage
Answer: B. red giant stage
When the sun runs out of fuel-hydrogen, its atmosphere expands and it becomes a red-giant star. The Sun would leave the main-sequence stage and enter the red-giant stage in which huge pressure generated in its core pushes the atmosphere outwards making it expand and nuclear fusion reaction of heavier nuclei starts. The end stage of Sun would be formation of a white dwarf.
Thus, from the given options, correct answer is B. red giant stage
The final stage in the sun's life cycle is the black dwarf stage. The black dwarf stage is proposed to be the final stage in the life cycle of a white dwarf, after it has exhausted its nuclear fuel and undergone gravitational collapse.
The correct option is D.
The life cycle of a star like the sun can be divided into several stages. The specific sequence of stages depends on the mass of the star. However, for a star like the sun, the stages are as follows:
Main Sequence: The sun is currently in the main sequence stage, where hydrogen fusion occurs in its core, producing energy.
Red Giant: As the sun exhausts its hydrogen fuel, it will enter the red giant stage. During this stage, the sun's core contracts while the outer layers expand, causing the sun to become larger and cooler.
Planetary Nebula: In the next stage, the sun will shed its outer layers, forming a glowing shell of gas and dust called a planetary nebula. This process exposes the core of the star.
White Dwarf: After the planetary nebula stage, what remains of the sun's core will collapse inward due to gravitational forces. Black Dwarf: The final stage in the sun's life cycle is the black dwarf stage.
Hence , D is the correct option
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Answer:
The answer would be C. orbit
by how they produce pitch
by what they are made of
by their frequency
Musical instruments grouped Option C. by how they produce pitch.
The pitch is decided by the velocity at which the vibrations arise or the frequency. A higher frequency corresponds to a better pitch. Harmonics are responsible for the variety of sounds generated via the instruments in every section of an orchestra. There are sounds that can be higher and louder than the main notice.
The frequency of a wave is the quantity of wave cycles in line with unit time. The wavelength of a wave is the distance between consecutive crests and troughs. The frequency of sound waves is called pitch.
Musical devices produce sound waves which is a longitudinal waves. based on the material that produces sound musical devices can be labeled as membranophones, chordophones, aerophores, electrophones, and many others.
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