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Anit [1.1K]
3 years ago
15

What are the 2 main ideas behind natural selection? (will give brainlist!)

Biology
1 answer:
ioda3 years ago
7 0

1-Charles Darwin

2-Alfred Russel Wallace

Explanation:

are jointly credited with coming up with the theory of evolution by natural selection, having co-published on it in 1858. Darwin has generally overshadowed Wallace since the publication of On the Origin of Species in 1859, however.

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How might symbiotic relationships be a disadvantage to an ecosystem?
natulia [17]

Answer:

it happens when 2 organisms jelp each other beneficial.

Explanation:

eg:algae and leguminous plants.the algae live on the roots and take in the nitrogen from the soil,which the plant cannot do and needs for growth.it takes in the nitrogen and pases it to the roots and even make the soil loose for the roots to move and they get a living space(algae on the roots).

4 0
3 years ago
Classify each RNA post-transcription processing event according to whether it occurs in prokaryotes or eukaryotes.
tigry1 [53]

'RNA is transcribed and translated in the cytoplasm', 'transcription produces an mRNA ready for translation' and 'RNA is proofread for errors' occur in prokaryotes, whereas '5′ cap, 3' poly-(A) tail and RNA splicing' occur in eukaryotes.

The prokaryotic cells (e.g., bacterial cells) do not contain cell nuclei, thereby the messenger RNA (mRNA) must be transcribed and translated in the cytoplasm.

During prokaryotic transcription, the RNA transcript is proofread for errors. In bacteria, DNA polymerases proofread the transcript by using their 3’ → 5’ exonuclease activity.

In eukaryotic cells, RNA processing consists of several mechanisms:

  • A 7-methylguanosine cap (5′ cap) is added to the 5′ end of the precursor messenger RNA (pre-mRNA).

  • A 3' poly-Adenine (A) tail is added to the 3' end of the pre-mRNA.

  • Both the 5′ cap and 3' poly-(A) tail protect the RNA transcript from its degradation by exonucleases.

  • Eukaryotic RNA splicing consists of the removal of non-coding regions called 'introns' and subsequent splicing of the protein-coding regions called 'exons'.

Learn more in:

brainly.com/question/24415778

7 0
2 years ago
Plantea un experimento que cumpla con todos los requisitos del método científico que refute la teoría de la generación espontáne
patriot [66]

Answer:o

J

Explanation:

Yess

6 0
2 years ago
How do sieve tubes elements group to make sieve tubes
kumpel [21]
<em>sieve tube elements are the cells of phloem which allow transportation of photosynthates through phloem...
<u>how sieve tube elements form sieve tubes:
</u>sieve tube elements are connected end to end and form a long chain which is called sieve tube,,,,
sieve tube elements are connected with the help of a side chain with the help of peptide bond...also one element has tapering end which easily overlaps with other end of next element to form sieve tube,,,,</em>

3 0
3 years ago
Light colored fur is recessive (bb) to dark colored fur. If 35% of the mouse population is light colored, answer the following:
Travka [436]

Answer:

  1. What percent of the population is BB? (Round to two decimal places)  → 17% BB  
  2. What percent of the population is Bb? (Round to two decimal places)         → 48% Bb  
  3. What percent of the population is bb? (Round to two decimal places)    → 35% bb  
  4. What is the frequency of the single dominant allele B? (Round to two decimal places) → 0.41  
  5. What is the frequency of the single recessive allele b? (Round to two decimal places) → 0.59

Explanation:

Due to technical problems, you will find the complete answer and explanation in the attached files

Download pdf
7 0
3 years ago
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