Answer:
23
Explanation:
Human somatic cells have 46 chromosomes, including 22 homologous pairs and one pair of nonhomologous sex chromosomes. This is the 2n, or diploid, condition. Human gametes have 23 chromosomes, one each of 23 unique chromosomes. This is the n, or haploid, condition.
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b. stratosphere
c. mesosphere
d. thermosphere
Auroras occur in the "thermosphere".
The thermosphere lies between the exosphere and the mesosphere.It is a district of expanding temperature in Earth's climate that is situated over the mesosphere.
The thermosphere significantly helps in ensuring the earth and making space investigation and present day types of correspondence conceivable. It additionally supports and ensures life on the planet. It reuses water, retains the sun's energy, and makes a moderate temperature.
The aurora (Northern Lights and Southern Lights) generally present in the thermosphere. It is a natural electrical marvel described by the presence of streamers of rosy or greenish light in the sky, particularly close to the northern or southern attractive shaft. The impact is caused by the communication of charged particles from the sun with iotas in the upper atmosphere.
Auroras occur in the thermosphere. Therefore, the correct option is D.
The Northern Lights, or aurora borealis, and the Southern Lights, or Aurora Australis, are natural light displays that occur in Earth's upper atmosphere. The thermosphere, the uppermost part of Earth's atmosphere, is where most of them occur. Several hundred kilometers to about 80 kilometers (50 mi) above the Earth's surface is where the thermosphere begins. Auroras are generated when charged solar particles such as electrons and protons interact with Earth's magnetic field and strike atoms and molecules in the thermosphere.
Therefore, the correct option is D.
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(1) It favors the survival of certain members
of the species and results in a change in
the proportion of individuals with highly
adaptive traits.
(2) It provides feedback mechanisms for members
of a species and results in a change in the
proportion of individuals with homeostatic
controls.
(3) It leads to reproduction with other species,
increasing the number of different adaptations.
(4) It increases competition between populations
that occupy different niches, increasing the
chance of extinction of the less-adapted
species.
facilitated diffusion
active transport
endocytosis and exocytosis
Answer: The correct answer for the blank is-
facilitated diffusion and
active transport.
Facilitated diffusion is a type of passive transport (transport of solute from high area of concentration to lower area of concentration) that requires transport protein ( which work as transporters or channels for the transport of solute).
Active transport also requires transport proteins/ carrier proteins (which work as pump) to drive the transport of solutes against the concentration gradient. This process utilizes energy (obtained from hydrolysis of ATP) for the transport because solute move from high concentration to an area where their concentration is less.
Answer:D. Heart and lung function
Explanation:the word “cardio” relates to the heart
Cardiorespiratory fitness refers to how efficiently the heart and lungs work together to deliver oxygenated blood to the muscles during exercise. It's essential for cardiovascular health, quality of life, and longevity.
Cardiorespiratory fitness refers to the ability of the heart and lungs (option d) to supply oxygen-rich blood to the working muscle tissues and the capacity of the muscles to use oxygen to produce energy for movement. This involves the circulatory and respiratory systems' abilities to transport oxygen throughout the body efficiently, maintaining overall health and stamina.
An individual with high cardiorespiratory fitness can sustain large-muscle, dynamic, moderate-to-high intensity exercise, such as walking, running, bicycling, and swimming, for prolonged periods. This capacity is critical for preventing cardiovascular diseases, improving quality of life, and promoting longevity.
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Tissues is just below organs in complexity.
A tissue is a collection of cells and extracellular matrix from the same origin that work together to perform a defined function. Multiple tissues are then functionally grouped together to form organs.
The hierarchy is the following (from the most simple to most complex):
1. Cell
2. Tissue
3. Organ
4. Organ system
5. Organism
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