Implications of natural selection in shaping 99.4% nonsynonymous DNA identity between humans and chimpanzees: enlarging genus Homo. we compare approximately 90 kb of coding DNA nucleotide sequence from 97 human genes to their sequenced chimpanzee counterparts and to available sequenced gorilla, orangutan, and Old World monkey counterparts, and, on a more limited basis, to mouse. The nonsynonymous changes (functionally important), like synonymous changes (functionally much less important), show chimpanzees and humans to be most closely related, sharing 99.4% identity at nonsynonymous sites and 98.4% at synonymous sites. On a time scale, the coding DNA divergencies separate the human-chimpanzee clade from the gorilla clade at between 6 and 7 million years ago and place the most recent common ancestor of humans and chimpanzees at between 5 and 6 million years ago. The evolutionary rate of coding DNA in the catarrhine clade (Old World monkey and ape, including human) is much slower than in the lineage to mouse. Among the genes examined, 30 show evidence of positive selection during descent of catarrhines. Nonsynonymous substitutions by themselves, in this subset of positively selected genes, group humans and chimpanzees closest to each other and have chimpanzees diverge about as much from the common human-chimpanzee ancestor as humans do. This functional DNA evidence supports two previously offered taxonomic proposals: family Hominidae should include all extant apes; and genus Homo should include three extant species and two subgenera, Homo (Homo) sapiens (humankind), Homo (Pan) troglodytes (common chimpanzee), and Homo (Pan) paniscus (bonobo chimpanzee).
Since the rate of flashing depends on the rate of reaction, it means that fireflies will flash slower during cold weather.
<h3>How does temperature affect rate of reactions?</h3>
Temperature affects the rate of reaction such that reactions are faster at high temperatures and slower at low temperatures.
Thus, since the rate of flashing in fireflies depends on the rate of reaction, cold temperature means that the rate of flashing will be low as compared to warm temperature.
In other words, fireflies will flash lower during cold weather and vice versa.
More on temperature and rate of reactions can be found here: brainly.com/question/16717828
#SPJ1
Answer:
Option-B
Explanation:
The brain is an organ composed of neurons which controls all the voluntary and involuntary of animals. In humans, the brain is located in the skull where the brain is suspended in a fluid called cerebrospinal fluid.
As humans ages and becomes old aged, the neurons in the brain losing their ability to perform their function, if they are lost they cannot be regenerated.
The lesions appear on the white matter of the brain and the brain shrink. Due to these known and other unknown features, the process controlled by these neurons become inadequate and shows slower brain processing and weak memory.
Thus, Option-B is the correct answer.
Answer:
I think this will not work for me the brainlist I don't know what to say to it or not so I'll probably need the meaning for my work to get to work with you on your own namaste to you later then u have any problem to help u to help with this please send it back so that we will have the correct information to be done to the same ASAP as we have not been able to complete the test yet and we have not been able to complete the test yet and we have not been able to complete the form and send it to you as I have drawn this mail from from the previous meaning that of which our previous correspondence was sent from my previous correspondence with regard the following which we I have request to for further your advice on this issue so that I may proceed with further details investigation as I did the wrong thing to do my job work and I was just in case of the people living on with you about this 3 namaste to do it in my room absence from my account as the brainlist is now in place and the money will not be returned as they will are not in a while cell cycle is the meaning real and time for me and I the brainlist will be.
Explanation:
Pls Mark me the brainlist please
