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laiz [17]
2 years ago
15

Which two globin genes are most divergent from each other? what is the percent amino acid identity between them?

Biology
1 answer:
tiny-mole [99]2 years ago
8 0

Globin 1 and globin 2 genes of insects are understood to have diverged approximately 170 million years ago, through duplication, from a common globin gene ancestor. The two genes that code for haemoglobin have conserved regions; oxygen-binding and heme- regions. Globin 2 gene has lost the intron region that is still present in the globin 1 gene. The percentage divergence is 7.2% with 20 varying nucleotides.





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According to the theory of endosymbiosis, the origin of chloroplasts probably involved: a. engulfing of small photosynthetic pro
DerKrebs [107]

Answer:

A. engulfing of small photosynthetic prokaryotes by larger cell

Explanation:

The endosymbiotic theory states that some of the organelles in today's eukaryotic cells were once prokaryotic microbes. In this theory, the first eukaryotic cell was probably an amoeba-like cell that got nutrients by phagocytosis and contained a nucleus that formed when a piece of the cytoplasmic membrane pinched off around the chromosomes. Some of these amoeba-like organisms ingested prokaryotic cells that then survived within the organism and developed a symbiotic relationship.

Some Evidence for this is based on the following:

1. Chloroplasts are the same size as prokaryotic cells, divide by binary fission, and, like bacteria, have Fts proteins at their division plane.

2. The mitochondria are the same size as prokaryotic cells, divide by binary fission, and the mitochondria of some protists have Fts homologs at their division plane.

3. Mitochondria and chloroplasts have their own DNA that is circular, not linear.

4. Mitochondria and chloroplasts have their own ribosomes that have 30S and 50S subunits, not 40S and 60S.

5. Several more primitive eukaryotic microbes, such as Giardia and Trichomonas have a nuclear membrane but no mitochondria.

7 0
3 years ago
Which nation is currently experiencing high population growth?
Alex73 [517]
China. Their country has been rapidly growing for years.

Have a nice day!
6 0
3 years ago
Read 2 more answers
Give examples of how hypothesis lead to new experimental methods
chubhunter [2.5K]

Answer:

Thomas Hunt Morgan continues on with the genetic research which is of Gregor Mendel but according to research Morgan used fruit flies.

Explanation:

Hypothesis is termed as an explanation which is being proposed for a phenomenon. There is a difference which is between scientific theory and scientific hypothesis.

8 0
3 years ago
Which Mechanism of microevolution caused the the beak of the medium gound finch population on dafne major to increase in size in
expeople1 [14]

Answer:

Natural selection

Explanation:

Microevolution refers to changes produced at a lower level than species. In genetics, microevolution is the change in the allelic frequency perceptible in a few generations. Most of these naturally produced changes by mutation, natural selection, genetic flux, genetic drift.

After the drought on Daphne Major, many of the plants producing small-sized seeds decreased their reproductive rate drastically. Consequently, there were almost no seeds available for the medium ground finch to feed. The population of this species also decreased to only a hundred birds over two years. Weather conditions and food availability influenced the survival of the animals.

With time, the finched population increased again, but now, the average size of the beaks was larger. The trait modification was related to the availability of only larger seeds with thick husks.

Eating large seeds with medium or small-sized beaks was impossible, so Finches needed to adapt, developing larger beaks to crack open the husks and eat the contents of the seeds.

<u>Natural selection was responsible for the rapid change in the finches´ population beaks size after the drought. </u>The evolutive force modifies the allelic frequencies, increasing the frequency of genetic variants that expressed the larger beak size and declining the frequency of the alleles that expressed smaller beak size.  

3 0
3 years ago
Flock X Flock Y Flock Z Total Pieces of Food Eaten 57 153 90 Food Percentage* % % % Simulated Number of Birds in Flock for 2nd G
Zepler [3.9K]

Answer: The percentage would be 19%, 51% and 30%.

Explanation:

Since we have given that

Number of food eaten by X = 57

Number of food eaten by Y = 153

Number of food eaten by Z = 90

Total number of food eaten = 57+153+90=300

So, Food percentage of flock X = \dfrac{57}{300}\times 100=19\%

Food percentage of flock Y = \dfrac{153}{300}\times 100=51\%

Food percentage of flock Z = \dfrac{90}{300}\times 100=30\%

Hence, the percentage would be 19%, 51% and 30%.

9 0
3 years ago
Read 2 more answers
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