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bagirrra123 [75]
3 years ago
14

Due to a extended 5 year drought the seeds became much harder than they were previously which graph would represent how the bird

population would change over these years

Biology
2 answers:
igomit [66]3 years ago
8 0
It’s Graph A :)
Like they said^
Reptile [31]3 years ago
5 0

Answer:

Graph A

Explanation:

With harder seeds, birds will need larger beaks in order to crack the seeds. The birds with smaller beaks won't be able to crack the seeds and will die because they can't eat anything. Graph A is the only one that shows a distinct increase in bird beak size.

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Variation in a trait is a required condition for natural selection to act on a population for that trait. Assuming a population
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Answer:

1. Mutation

2. Epigenetics

Explanation:

1. Mutation occurs when there is a change in an organism's DNA sequence as a result of mistakes in DNA replication or as a result of environmental factors like smoking. The mutation in a single organism can be passed on to other generations hence causing a genetic variation in the population, this obeys the Darwin's law that inherited traits (genetic) are passed on to other generations

2. Epigenetics are changes in gene expression that doesn't involve changes in the DNA sequences unlike mutation. This changes can be passed on to other generations and hence cause a variation in the population. This obeys the Lamarckian evolution that acquired traits are passed on to other generations.

A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke.

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How do hormones affect gene activity?
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Answer:

makes them more active.

Explanation:

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How would decerasing the time it takes you to run a certain distance affect your speed ?
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A part of an mRNA molecule with the following sequence is being read by a ribosome: 5'-CCG-ACG-3' (mRNA). The charged transfer R
xxTIMURxx [149]

Protein synthesis involves transcription and translation. During transcription, mRNA complements the DNI template strand. During translation, mRNA codons specify the amino acids that must be added to the growing polypeptide by tRNA.  

-----------------------  

Before answering all these questions, let us review some framework.

Nitrogenated bases that conform nucleic acids correspond to purines and pyrimidines.

  • Adenine and guanine ⇒ purines,
  • Thymine, Uracile, and Citocine ⇒ Pyrimidines.  

⇒ In the DNA molecule, Adenine always forms pairs with Timine , while Guanine forms pairs with Cytosine.

⇒ In RNA molecule, Timine is replaced by Uracil. So Adenine forms pairs with Uracil, and Guanine forms pairs with Cytosine.

  • Transcription occurs in the nucleus. The template DNI strand is read in direction 3´→ 5´ to build the mRNA molecule that grows in direction 5´→ 3´.
  • Translation occurs in the cytoplasm, where a ribosome reads mRNA in the 5´ to 3´ direction. According to the codons being readen, tRNA transfers the correct amino acids to build the polypeptide chain.

Codons are short sequences of three nucleotides that carry the genetic information for the aminoacids´ assembly.

mRNA has start and end codons. Between them, there are codons that code for the amino acids to be added to the chain. The start is the signal of the synthesis initiation. When the ribosome reaches the end codon, protein synthesis is over.    

There exists a total of 64 codons.

  • One of them is the start codon → AUG → Metionine  
  • 61 codify amino acids, and
  • the remaining three are stopping points  → UAA, UAG, UGA.

-----------------------

Now, let us answer the questions.

  • mRNA ⇒ 5'-CCG-ACG-3'
  • tRNA  ⇒ 3'-GGC-UGC-5'  ⇒  tRNA Anticodon
  • Protein ⇒  Glycine-Cysteine ⇒ dipeptides

GGC codes for Glycine, while UGC codes for Cysteine

  • tRNA   ⇒ AUG ACA ⇒ Anticodons
  • mRNA ⇒ UAC  UGU ⇒ Codons

  • DNI strand     ⇒ CAG
  • mRNA strand ⇒ GUC

  • Protein       ⇒   Val  -  His  -  Thr
  • DNI Strand ⇒  CAT - GTA - TGG

  • tRNA ⇒ RNA that functions to use coded instructions to assemble amino acids

  • RNA ⇒ Transfers genetic information from the nucleus to the cytoplasm ⇒ After transcription and before translation

----------------------------------------

Related link: brainly.com/question/16305465?referrer=searchResults

8 0
3 years ago
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