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kondaur [170]
3 years ago
8

7. Why do scientists think that photosynthetic prokaryotes were probably not the first life forms on Earth?

Biology
2 answers:
Rasek [7]3 years ago
8 0
Microbes were the first inhabitants of Earth. They are single-celled organisms, like bacteria, fungi, and protozoa. Microbes are still found just about everywhere today, thriving in boiling hot thermal springs 
Hope this Helps :D 
chubhunter [2.5K]3 years ago
4 0
Because photosynthesis is  Four stage sequence of how life first<span> developed on </span>Earth way in the being of time <span>small organic molecules </span><span />
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The response of an effector is:
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Answer:

to transmit an output in response to the total afferent input

Explanation:

An effector refers to parts of the body generates response. An effector responds to transmit an output in response to the total afferent input  Stimulus in the body are detected by the receptor which send signals to the central nervous system via sensory neuron where interpretation and a response is coordinated by the brain. The response is sent to the effector through the motor neuron.

5 0
3 years ago
Which of the following sequences shows a frameshift mutation compared to the wild-type mRNA sequence?
Butoxors [25]

Option C:

B. wild-type 5-AUGCAUACAUUGGAGUGA-3 mutant 5'-AUGCAUACAUCUGGAGUGA- 3' 

Explanation:

A frameshift mutation is a genetic mutation such that the triplet nature of gene expression by codons, the insertion or deletion occurs in such as way that it alters the complete sequence of 3 codon sets and can change the reading frame, resulting in a completely different translation from the original.

As it is pertinent to understanding that all genes are normally translated in sets of 3 codons, which typically describes and explain a unique amino acid sequence. Thus, if a frame shift mutation occurs, it can affect many amino acid sequences and finally the entire protein.  

If we look at option B:

wild-type 5-AUG   CAU  ACA  UUG  GAG  UGA-3  

mutant 5’-    AUG   CAU  ACA  UCU  GGA  GUG  A-3’  

An insertion of a base Uracil showed at the end of 3rd codon which affected and altered the whole sequence of codon triplets. This changed all next codons and finally all next amino acids will be altered.

8 0
3 years ago
If a TRNA had a AGC anticodon it could attach a
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A transference RNA (tRNA) is an adapter molecule that decodes a codon messenger RNA (mRNA) during the synthesis of a polypeptide chain. These molecules (tRNAs) play a fundamental role during translation.

  • If a tRNA had an AGC anticodon it could attach a codon having the sequence UCG.

  • During translation, tRNAs act at specific sites in a ribosome to synthesize a polypeptide chain (i.e., a protein) from an mRNA sequence.

  • The anticodon of the tRNA binds by base complementary to a triplet of nucleotides or 'codon' in the messenger RNA (mRNA) during protein synthesis (i.e., translation).

  • According to the base complementarity rules, in RNA, Adenine always pairs with Uracile (Thymine in DNA), whereas Guanine always pairs with Cytosine.

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brainly.com/question/10014731?referrer=searchResults

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3 years ago
Suppose you want to design and build a house how would you communicate your design plans with the construction crew that would w
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