Blood vessels dilate and blood is directed to the superficial layers of the skins is one way in which the body will react to maintain homeostasis.
Homeostasis is the set of self-regulation phenomena that lead to the maintenance of constancy in the properties and composition of the internal environment.
Control in blood flow is a response that reduces heat transfer and therefore maintains body temperature.
Thermoreceptors upon detecting an increase in body temperature, are activated and transmit this information to the hypothalamus that receives the information.
Blood vessels constrict to reduce the passage of "warm" blood to the skin, allowing it to be used in vital organs.
Blood vessels in the skin dilate as a result of increased body temperature, allowing molecules to separate and occupy more space.
In addition, it increases the amount of warm blood that flows from inside the human body, increasing blood pressure and transmitting heat to the outside environment more quickly.
This allows body temperature to be lowered, a notorious consequence of this dilation of the vessels is the reddening of the skin where there is greater flow and transfer of body heat.
Therefore, we can conclude that blood vessels dilate and blood is directed to the superficial layers of the skins is one way in which the body will react to maintain homeostasis.
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b. rainy
c. temperate
d. tropical
The biomes closest to the Earth's poles are described as polar, characterized by extreme low temperatures and snowy or icy conditions.
Biomes that exist closest to the Earth's poles are described as polar. These cold and harsh biomes include the tundra and ice caps, where temperatures are extremely low and the environment is traditionally snowy or icy. Vegetation in these regions is limited due to the harsh climate conditions. The polar regions are home to animals whose physical characteristics and behaviors have adapted to survive in these extreme conditions, such as polar bears and penguins.
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Answer: All chromosomes replicate once in a cell cycle
Explanation :
DNA replication is the action of DNA polymerases synthesizing a DNA strand that is complementary to the original strand or template strand.
In eukaryotes, it is during the S phase of the cell cycle that the vast majority of DNA synthesis occur and the entire genome uncoil and divide to form two daughter cells or copies while In Bacteria, replication begins at the origin of replication, supercoiled DNA is unwound by DNA gyrase, made single-stranded by helicase, and bound by single-stranded binding protein to maintain its single-stranded state.
In Eukaryotic DNA replication. all chromosomes replicate once in a cell cycle and Replication begins at many origins along each chromosome, this is why genome replication of eukaryotes occurs faster than those of bacteteria even thouge their DNA molecules are larger than the DNA molecules of Bacteria.
B. acquired
C. heritable
D. genetic
Answer:
Early organisms in the precambrian era converted ___Carbon dioxide__ to oxygen.
Explanation:
THE PRECAMBRIAN ERA:
The word Precambrian means before the Cambrian period. Before the formation of oldest rock with having fossils in them this term was used to the whole period of earth's history.
This era gone through number of important changes. One important change is that atmosphere of this era is deprived of Oxygen. All other content of the atmosphere is same as component of air present today but with little water vapours. Early organisms in the precambrian era converts carbon dioxide into oxygen. This oxygen was very less and begins to combine chemically with iron and other elements. This produces great mineral deposits around the world. This is the era from where aerobic respiration organisms start their life cycles.