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DedPeter [7]
4 years ago
5

Why scientists know more about the cenozoic than they do about other eras

Biology
1 answer:
Nikitich [7]4 years ago
6 0
Wasnt a long time ago from now so a lot of fossils that can be easily found. 
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Bats Devastated by Deadly Fungus
MA_775_DIABLO [31]
Infected bats develop lesions
(sores) on their wings, which play important roles in water balance, circulation and heat regulation.
These lesions on a bat’s wings or on its nose cause the bat to wake up during hibernation.
Waking up early forces the bat to use up the energy it has stored as fat for its long
sleep, exhausting the animal and eventually killing it.
<span>In some infected caves, 90 percent to 100 percent of bats die. On average, the disease</span>
7 0
4 years ago
Which kind of energy propels a sailboat? A) chemical energy , B) electrical energy, C) mechanical energy, D) thermal energy
ruslelena [56]

Answer:

It is C or D but most likely C

Explanation:

7 0
3 years ago
You are growing yeast cells in a culture. After a few days of consistent growth, you notice that cell growth has slowed consider
BigorU [14]

The correct answer is C) There is not enough oxygen in the culture medium. This is because of alcoholic fermentation, and anaerobic process where the yeast transform sugar (glucose) in ethylic alcohol (ethanol) and carbon dioxide. Glucose is decomposed into pyruvic acid which then after turns into CO2 and ethanol. The bubbles described, are produced by the carbon dioxide.

The yeast, as well as some bacteria, use the glucose molecule through "glycolysis"  to obtain a 3-carbon molecule called pyruvates. Glycolysis consists of 10 coupled reactions, in the end, from one glucose (6 carbons) the yeast will obtain two pyruvates (3 carbons each).

Pyruvate can follow three main routes to obtain ATP, end up as lactate, as carbon dioxide (CO2) and water or as ethanol (alcohol) and CO2. Regarding yeast, it can only be used to obtain Ethanol plus CO2 or to obtain CO2 plus water.

The path that follows from here depends on the reaction medium. The cell gets much more energy (38 molecules of ATP) by converting pyruvate into water + CO2 than by turning it into ethanol + CO2 (2 molecules of ATP). Then, whenever possible, the yeast will follow the CO2 + water path. To support this route the cell needs oxygen.  In this case, the cell obtains its energy by breathing when there is no oxygen available, the yeast has a way that allows it to gain much less energy but allows it to survive, the alcoholic fermentation, previously mentioned.

Therefore, A, B, and D answers are wrong for the reasons mentioned above.


8 0
3 years ago
PLS HELP ME jejej dkejjfjdkqkwlel ekeko man
Ber [7]

Answer:

hypotonic

Explanation:

i need a bit more information about what you are learning. But by what i know (im in college for biology) this appears to by hypotonic because there is more water in the cell than in the solution.

7 0
3 years ago
Which of the following sequences shows a frameshift mutation compared to the wild-type mRNA sequence?
earnstyle [38]

Answer:

D) wild-type 5’-AUGCAUACAUUGGAGUGA-3’ mutant 5’-AUGCAUACAUCUGGAGUGA-3’ is the right answer

Explanation:

frame shift mutation is that mutation in which change in nucleotide sequence ( deletion or insertion) changes the encoding amino acid sequences.

wild-type 5’-AUGCAUACAUUGGAGUGA-3 encode  MHTLE- protein sequence  while

5’-AUGCAUACAUCUGGAGUGA-3’ encode MHTSGV.

in this option there is clear difference between the encoding amino acid sequence

.in option A and B, there are addition and deletion of amino acids because of addition of nucleotide.

5 0
4 years ago
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