D
Embryonic stem cells are capable of self-renewal and unlimited differentiation.
Explanation:
An embryo is at the earliest stages in the growth and development of a higher organism. The cells of an embryo are pluripotent meaning that at the stage, they can differentiate into any type of cell of the organism. Therefore these cells are not determined and are referred to as stem cells. These cells are also self-renewing meaning that the cells can divide more stem cells.
Over time, these cells will begin to differentiate into tissues, organs, organ systems and ultimately into the whole organism. Some of the cells like the nerve,blood and muscle cells will also lose their self-renewal capacity.
Learn More:
For more on stem cells check out;
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Answer:
The answer is A, open systems!!
Explanation:
all systems on earth are open, except for the earth itself.
Explanation:
you could include the points such as,
<em>-</em><em>-</em><em>></em><em> </em><em>photosynthesis</em><em> </em><em>produces </em><em>O2 </em><em>which </em><em>is </em><em>necessary</em><em> </em><em>for </em><em>respiration</em><em>.</em>
<em>-</em><em>-</em><em>></em><em>photosynthesis</em><em> </em><em>reduces </em><em>the </em><em>amount </em><em>of </em><em>CO2</em><em> </em><em>in </em><em>the </em><em>atmosphere</em><em> </em><em>as </em><em>it </em><em>uses</em><em> </em><em>it </em><em>up </em><em>in </em><em>the </em><em>reaction</em><em>. </em><em>this </em><em>controls </em><em>the </em><em>atmospheric</em><em> </em><em>rate </em><em>of </em><em>CO2</em><em> </em><em>and </em><em>reduced the</em><em> </em><em>greenhouse </em><em>effect.</em>
<em>-</em><em>-</em><em>></em><em> </em><em>plants </em><em>are </em><em>the </em><em>primary </em><em>producers </em><em>in </em><em>a </em><em>food </em><em>chain </em><em>and </em><em>so,</em><em> </em><em>photosynthesis</em><em> </em><em>plays </em><em>a </em><em>primary</em><em> </em><em>role </em><em>in </em><em>the </em><em>stability</em><em> </em><em>of </em><em>food </em><em>chains </em><em>as </em><em>they're </em><em>the </em><em>primary</em><em> </em><em>source </em><em>of </em><em>glucose </em><em>as </em><em>all </em><em>the </em><em>higher </em><em>consumption</em><em> </em><em>is </em><em>based </em><em>off </em><em>the </em><em>producer</em><em>.</em>
<em>-</em><em>-</em><em>></em><em> </em><em>virtually</em><em> </em><em>seeing,</em><em> </em><em>all </em><em>the </em><em>energy </em><em>within </em><em>the </em><em>biosphere </em><em>is </em><em>based </em><em>off </em><em>plants </em><em>that </em><em>depends</em><em> </em><em>on </em><em>photosynthesis</em><em>.</em>
<em>-</em><em>-</em><em>></em><em> </em><em> If photosynthesis ceased, there would soon be little food or other organic matter on Earth, most organisms would disappear, and Earth's atmosphere would eventually become nearly devoid of gaseous oxygen.</em>
there could be more but this is all I could think of.
hope it helps. :)
Answer:
the actual REAL answer would be, Parthenogenesis involves the formation of a zygote.
Explanation: Formation of a zygote is the step in both, sexual and asexual reproduction. Both modes of reproduction tend to continue the lineage of life forms and to pass on genetic material on their offspring.