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uranmaximum [27]
3 years ago
8

Lynn Margulis developed the endosymbiont theory to explain the evolution of certain eukaryote organelles, such as chloroplast an

d mitochondria. According to this theory which of these events occurred to anvient prokaryote cell?

Biology
1 answer:
Flura [38]3 years ago
6 0

Answer:

The answer is C. The cell took in another ancient prokaryotic cell, which began living inside it.

Explanation:

  • The Endosymbiont Theory explains the evolution of membrane bound organelles such as mitochondria and chloroplasts.
  • According to the theory, mitochondria evolved when an ameoba like organism engulfed bacteria capable of cellular respiration.
  • Similarly, chloroplasts were developed when the ameoba like organism engulfed cyanobacteria or blue-green algae capable of photosynthesis.
  • These organisms survived inside the ameoba over millions of years to develop into mitochondria and chloroplasts.
  • The fact that mitochondria and chloroplasts have their own circular DNA and ribosomes is evidence of the endosymbiont theory.
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Answer:

A. Primary dimensions are less changeable, while secondary dimensions can change and are less visible.

Explanation:

The differences between primary and secondary dimension of diversity are as follows -

A) Primary Dimension

a) Primary dimension are those which are salient and hence they cannot change

b) Some common examples of primary dimensions are - ethnicity, sexual orientation, ethnicity,  gender, race, physical abilities/qualities, age etc.

A)  Secondary Dimension

a) Secondary dimension are not only limited to specific features and hence they can change with time.

b) Some common examples of secondary dimension are - geographic location, marital  status, parental status. work experiences, educational background, income,military experience, religious beliefs, etc.

Hence, option A is correct

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Explanation:

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Three human disorders−−fragile X syndrome, myotonic dystrophy, and Huntington's disease−−are conceptually linked by a common mod
Fed [463]

Answer:

The correct answer is ''All three are caused by disparate genes, but each gene was found to contain repeats of a unique trinucleotide sequence.''

Explanation:

Four groups of trinucleotide repeats related to DNA expansion have been characterized in the human genome. CGGI GCC, CAGIGTC, CTGIGAC and recently GW CTT sequences. The CGGl GCC sequences are usually located in the noncoding regions of different genes and when expanded they associate with fragile sites on the chromosomes. The CAGIGTC repeats are part of the coding region and are related to different neurodegenerative disorders. You can try to make a classification depending on the unit that is repeated, having on one side a group that are caused by repeats of the CAG trinucleotide (cytosine, adenine, guanine). Huntington's disease (HD) is a progressive disorder of motor, cognitive and psychic function. The disease is inherited in an autosomal dominant manner, and is caused by the expansion of CAG trinucleotide repeats in exon 1 of the gene called huntingtin (HTT or IT-15). Unstable mutations have also been found in which the repeat unit does not is composed of three nucleotides, if not four, such as type 2 myotonic dystrophy, where the tetranucleotide CCTG repeats. Fragile X Syndrome consists of an abnormal expansion of the cytosine-guanine-guanine trinucleotide (CGG) in the FMR1 gene, which prevents intellectual disability and also influences the formation of connective tissue

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