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pychu [463]
1 year ago
6

With the endosymbiotic hypothesis in mind, what structure within modern-day chloroplasts is likely derived from the cytoplasm of

an ancestral cyanobacterium that took up residence within a eukaryotic cell?
Biology
1 answer:
777dan777 [17]1 year ago
4 0

Inner membrane of the chloroplasts

Explanation:

The present day eukayrotes are all considered to be derived from its original ancestor – the cyanobacteria.

Earlier, photosynthesis by the first photoautotrophs took place utilizing hydrogen sulphide as the electron donor. However, it was later when the cyanobacteria, which were originally residing in the mitochondria of an eukaryotic cell under an endosymbiotic relationship, developed into true chloroplasts, the use of water as electron donor to perform photosynthesis began.  

The cyanobacteria were aerobic in nature and required oxygen to survive. They evolved the chloroplasts covered with an external protective membrane and an internal membrane. It is the internal membrane which contains all the necessary organelles or components necessary for photosynthesis like thyllakoids, stroma etc which helped them to utilize water as an electron donor during photosynthesis like all the eukaryotes.  

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What did researchers discover about the genetic mutation causing the loss of pelvic spines?
astra-53 [7]
Scientists recently discovered that there is this specific gene called "Pitx1" that is responsible for the less of pelvic spines in animals 15,000 years ago. Among the most common example of the animals affected by this gene is are the freshwater skittlebacks.


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

4 0
1 year ago
Salamanders, ospreys, snapping turtles, and beavers all live in aquatic habitats. Salamanders lay their eggs in small freshwater
AveGali [126]

Answer:

A. Salamanders

Explanation:

Specialists species are species that can thrive in a unique and limited range of resources. They require a specific environmental condition to reproduce and survive in  environment and also have limited or few diets they need for nutrition. These limiting characteristics put them at a disadvantage of being endangered and threatened.  

Salamanders are endangered species that are fast going into extinction. They require wetland (freshwater pools) for reproduction to be possible, and feed mainly on insects. This makes them specialist species.

Ospreys, snapping turtles, and beavers are all generalist species. They can all thrive in a wide range of environmental conditions, and also have varieties of diets they can get nutrition from to survive.

6 0
2 years ago
What is a disacharride?
irinina [24]
2 monosaccharides (glucose monomers) combined
4 0
2 years ago
Some members of david's family have an autosomal recessive disease. david does not have the disease; neither do his parents, nor
Sauron [17]
A pedigree shows the genotypes of the family members 
in autosomal recessive disorders, the diseased genes are inherited from the parents. For the person to get the disease both diseased genes should be there in the genotype as its a recessive disorder.
the dominant gene - H
   recessive gene    - h
for a person to get a disease, genotype should be hh, as its autosomal recessive. If the person is normal he/ she could have the genotype HH or could be Hh and thats called a carrier.
the offspring will receive one gene from the mother and one from the father 

8 0
2 years ago
List at least three scientific disciplines related to chemistry mentioned or alluded to in the article.
Bogdan [553]

Scientific Disciplines:

Biochemistry and Molecular Biology.

Cancer Biology.

Cell Biology.


Chemistry:

Developmental Biology and Genetics.

Immunology.

Microbiology.

Neuroscience.


3 0
1 year ago
Read 2 more answers
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