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3 years ago

In what instances might punctuated equilibrium occur?

Biology

1 answer:

vekshin13 years ago

6 0

Punctuated equilibrium occur when the environment is rapidly changing eliminate.

Answer: Option B

<u>Explanation:</u>

Punctuated equilibrium generally occurs when a sudden massive change occurs in the regular stream. The organisms are forced to adapt themselves to the new environment at the earliest and this process is induced to maintain the equilibrium.

This is the reason why you find an abrupt change in the species without undergoing slow morphological changes. Hence no intermediate forms can be found if you would examine the fossils. Hence to conclude when a species under rapid change to evolve itself to suit the environment it is punctuated equilibrium.

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Question 7: What might be some implications of Robert Hazen’s experiments

Angelina_Jolie [31]

Answer:

Robert Hazen’s studied enviromental and biological processes that might have been critical for life, and also for the formation of approximately two-thirds of Earth's mineral species (see Hazen et al., 2008; Gonzalez & Richards 2020) .

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Hazen provided evidence about how first organic molecules were generated on the primitive earth millions of years ago. He observed that high-pressure hydrothermal vents may provide food for underwater ecosystems. It represents a piece of critical evidence on the origin of life.

You can read these articles that are certainly clarifying in the description of his experiments and discoveries:

1- Hazen, R. M., Papineau, D., Bleeker, W., Downs, R. T., Ferry, J. M., McCoy, T. J., ... & Yang, H. (2008). Mineral evolution. American Mineralogist, 93(11-12), 1693-1720.

2- Gonzalez, G., & Richards, J. W. (2020). The privileged planet: how our place in the cosmos is designed for discovery. Gateway Editions.

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3 years ago

Non-protein coding DNA in eukaryotes contains repetitive elements that include (select all that apply): Group of answer choices

Olegator [25]

Answer:

interspersed, transposon-derived repeats, simple sequence repeats.

Explanation:

In the human genome, not only the protein coding genes are present, in fact these genes make up just a very little portion of the human genome about 1.5-2% of the entire human genome. Repeats make up about 48% of the human genome which is the largest and the rest include, conserved non coding sequences (43.5%), heterochromatin regions etc.

Some of the repetitive elements includes LINEs, SINEs, DNA fossils tranposoon, Retrovirus like elements. all these are transposable elements which are mobile DNA sequences that can migrate to different regions/areas of the genome.

Microsatellites (simple sequence repeats) are tracts of repetitive DNA in which certain DNA motifs are repeated normally 5-50 times.

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3 years ago