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Andreyy89
3 years ago
10

30 POINTS ASAP

Biology
1 answer:
Helen [10]3 years ago
7 0
Scientist combine-several well-tested techniques to find out the ages of fossils. The most important are Relative Dating, in which fossils and layers of rock are placed in order from older to younger, and Radiometric Dating, which allows the actual ages of certain types of rocks to be calculated. There is no way to calculate an "absolute" age. Relative Dating. 
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Macroevolution occurs within a population.
ivanzaharov [21]

Answer:

Unsure what this is asking but yes, it does.

5 0
3 years ago
What do we call the process where part of the DNA is saved during replication?
Nataly_w [17]

Answer:

The process where part of the DNA is saved during replication is known as semi conservative replication.

Explanation:

During cell division, a cell must first replicate its DNA (Deoxyribonucleic acid).  When a cell divides into daughter cells , the DNA of the parent cell must be copied because DNA contains the genetic material of an organism. DNA replication is the process in which DNA is copied  during the cell  division cycle.  During replication, the complementary strands of the original double helix DNA are separated and one of the two strands in the original molecule is saved in the new DNA molecule. Thus the new DNA molecule is made of an original strand and a newly synthesized strand. So the DNA replication is known as semi conservative replication. Each strand of the original DNA molecule is referred as the template strand because it provides information for the production of newly synthesized strand. It takes place inside the nucleus of a cell during the s stage  of the cell cycle. During replication, helicase enzyme breaks the hydrogen bonds between the complementary bases (Adenine with Thymine, Cytosine with Guanine) and unwinds the double helix of DNA. The two separated strands create a Y-shaped replication fork and act as templates for the synthesis of new strands of DNA. Enzymes known as DNA polymerases create the new strands.

6 0
3 years ago
In your own words, explain how changes in the number of sunspots is related to changes in global climate.
Kobotan [32]
<span>The sunspots are eruptions of heat and light energy emitting from the surface of the sun. These can increase our energy absorption many times above normal. Especially if it is pointed directly at the earth. These have been known to disrupt several bands in the radio spectrum and have knocked out communications of satellites. Naturally all this energy would have a great effect on our earth in many ways, climate included.</span>
4 0
3 years ago
Read 2 more answers
in addition to keratinocytes, the stratum spinosum also contains another epidermal cell type called epidermal ______ cells that
WARRIOR [948]

Keratinocytes are differentiated skin cells found in the outermost layer of the epidermis. Dendritic cells are antigen-presenting cells that play important roles in the adaptive immune response.

  • In addition to keratinocytes, the <em>stratum spinosum</em> also contains another epidermal cell type called epidermal DENDRITIC cells that help to fight infection.

  • The s<em>tratum spinosum</em><em> </em>is an epidermal skin layer between the <em>stratum granulosum </em>and<em> stratum basale</em>.

  • Dendritic cells are antigen-presenting cells that are capable of processing harmful antigens in order to present them on the cell surface to the T cells of the immune system.

Learn more in:

brainly.com/question/6955146?referrer=searchResults

5 0
2 years ago
Carlos avoids _____on the ingredient list of packaged foods because he has celiac disease.
mamaluj [8]

Answer:

wheat, rye, and barley

Explanation:

  • Celiac disease is a type of an immune disorder in which a person is unable to eat food that contains gluten because it can lead to the destruction of their small intestine.
  • Gluten is a type of protein that is found in several ingredients such as wheat, rye, and barley.
  • Consumption of gluten can lead to the development of inflammation in the small intestine which after a certain time can lead to its destruction.
  • The various symptoms associated with the disease include bloating, diarrhea, anemia, etc.
  • Since Carlos has celiac disease he has to avoid wheat, rye, and barley.
5 0
3 years ago
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