cell division and differentiation, and the role of specialized cells in complex organisms, such as humans.
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The stems cells make new cells by the process of cell division and the new cells continuous to divide and continue to grow and specialize into new cells that tends to replace themselves.
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Stem cell division is the process of mitosis that produces two identical daughter cells, which can then either remain as stem cells or differentiate into specialized cells. Specialized cells have specific functions in complex organisms.
In stem cell division, stem cells undergo the process of mitosis to produce two identical daughter cells. These daughter cells can either remain as stem cells or differentiate into different types of specialized cells. Stem cell differentiation is the process by which stem cells develop into distinct cell types with specific functions. In complex organisms like humans, specialized cells play crucial roles in various physiological processes, such as carrying oxygen in red blood cells or transmitting signals in nerve cells.
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b. placer mining
c. subsurface mining
d. none of the above
Answer;
-Surface mining
Explanation;
-Mining involves the extraction of valuable minerals or other geological materials from the earth, commonly from an orebody, lode, vein, seam, reef or placer deposit. Despite having a large range of advantages economically, mining impacts the environment negatively because minerals are contained within the Earth. Earth must be removed in order to extract the minerals. When the minerals are close to the surface, the earth is removed, causing destruction to the shape of the land and the flora and fauna living in that area.
-Among different types of mining, surface mining is one of the method that greatly impacts the environment. It destroys all plant life in the area the mine occupies. Plants living in the area where the surface mine is to be located are removed. After the surface mine is no longer productive, plants may eventually return to the area, but typically some human efforts at reclamation are required to restore the environment to some level of productivity.
Answer:
It's C. subsurface mining
Explanation: hope it helps ^w^
The base paring that occurs during DNA replication is Adenine to Thymine, Thymine to Adenine, Cytosine to Guanine, Guanine to Cytosine.
During DNA replication, specific base pairings occur that ensure accurate and faithful duplication of the genetic information.
DNA consists of four nucleotide bases:
adenine (A),
thymine (T),
cytosine (C), and
guanine (G).
The base pairing rules are as follows:
Adenine (A) always pairs with Thymine (T).
Thymine (T) always pairs with Adenine (A).
Cytosine (C) always pairs with Guanine (G).
Guanine (G) always pairs with Cytosine (C).
Learn more about DNA replication here: brainly.com/question/21265857
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Answer:
a keystone species
Explanation:
A keystone species is a species that plays a key role in the balance of the entire ecosystem. Some examples of keynote species that are critical for their ecosystems include sharks, African elephants, sea otters, etc. The most important feature that defines a keynote species is the fact that these species have a huge influence on the food web dynamics. Moreover, keystone species are also characterized by a low functional redundancy (ie., they cannot be replaced by other species within the ecosystem).