Stars with higher mass have shorter lifespans. When the sun becomes a red giant, its atmosphere will engulf the Earth. During the red giant phase, a main sequence star's core collapses and burns helium into carbon. After about 100 million years, the helium runs out, and the star turns into a red supergiant.
I hope this finds you what you were looking for.
Answer:
Believe it or not, mitochondria are their own organisms!
That’s right, they are single celled living beings that hitch a ride inside our cells for security, and in return they make our energy systems run much better than they would. This arrangement started a very long time ago, before we split from our last ancestor with plants, and long before we became multicellular. Other than this arrangement, our DNA has nothing to do with the DNA of the mitochondria (other than synergistic evolution making us more compatible with one another).
For this reason, it is easy to see how mitochondrial DNA differs from nuclear DNA.
First major difference is that we are in different kingdoms and even different super kingdoms to mitochondria (I know there are only meant to be 5 kingdoms but in biology people often use a system based off genetic differences, leading to a huge array of kingdoms that are often really distantly related). So our DNA and mitochondrial DNA share very few similarities. We both replicate our DNA using the same method and have the same base pairs, but the DNA itself says different things.
Another difference is that mitochondria generations are very fast compared to humans’, so their DNA undergoes genetic drift at a much faster rate, and changes more over time. Therefore it is much easier to locate recent changes in populations, for example the migrations out of Africa in the last 200,000 years, or the ethnic backgrounds of different African races, using mitochondrial DNA. In contrast nuclear DNA has fewer fine mutations that can be used as a map for recent events (in the last million years, say).
Mitochondria are passed down from mother to child in animals, so you will always have your mother’s mitochondrial DNA. This is why there is a mitochondrial Eve- this is the last female that is an ancestor of everyone on the planet, and therefore every human possesses direct ancestors of her mitochondria (and her nuclear DNA). In contrast we receive a 50/50 split of nuclear DNA from father and mother.
I hope this helps!
From smallest to largest. That will be
Cell; cheek cell
Tissue; hydra
Organ; heart
System; digestive system
Organism; lion
Tissue is a group of cells, an organ is a group of tissues, a system is a group of organs, an organism is a group of systems
Hope that helped. Have a nice day
Hi.
All answers except B are correct.
When living things exhale, we release carbon dioxide. Producers use photosynthesis to make food & oxygen - using carbon dioxide.
~
Answer:
Eukaryotic cells typically have circular chromosomes, whereas prokaryotic cells typically have linear chromosomes.
Explanation:
Prokaryotic and Eukaryotic cells are the two kinds of cells that living organisms are composed of. Eukaryotic cells are cells that possess a membrane-bound nucleus while prokaryotic cells do not possess a membrane-bound nucleus. The cell membrane of eukaryotes contain ester-linked phospholipids, whereas that of prokaryotes (bacteria and archeae) have ether-linked or ester-linked phospholipids.
Peptidoglycan is the major constituent of the cell wall of many prokaryotes (bacteria) while peptidoglycan is absent in the cell wall of eukaryotes that possess it. One notable difference between eukaryotic and prokaryotic cells is the SHAPE OF THEIR CHROMOSOME.
- The chromosome in eukaryotic cells is LINEAR while that in prokaryotic cells is CIRCULAR in shape.
