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laila [671]
3 years ago
10

Please help me!!!<3 What are 2 limits of natural selection? Please explain why the limit.

Biology
1 answer:
Brums [2.3K]3 years ago
8 0

1. natural selection acts on existing traits because you can not evolve into something you didn't have

2. original structures evolve to accomplish new function in order to survive

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How do enzymes speed up biochemical reactions?
Kay [80]

Answer:

Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. Many enzymes change shape when substrates bind.

Explanation:

4 0
3 years ago
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Which of the following types of RNA codes for a protein?<br><br> dsRNA<br> mRNA<br> rRNA<br> tRNA
Alborosie

Answer:

mRNA

Explanation:

mRNA, the messenger RNA is the type of RNA that serves as a template for synthesis of proteins. mRNA is formed by the process of transcription that occurs inside the nucleus. The mature mRNA leaves the nucleus and enter cytoplasm to join ribosome.

The sequence of the nucleotide of mRNA is read in the form of genetic code and each triplet codon signifies specific amino acid to be added to the newly synthesized protein. For the purpose, the tRNAs deliver the specific amino acids to the mRNA-ribosome complex while rRNA are the structural components of ribosomes.  

3 0
3 years ago
What do you notice about the ecological footprint of the United States compared to other countries?
Anton [14]

Answer:

It's large compared to other countries, but only because of consumerism

Explanation:

The United States is the 5th largest ecological footprint in the world, with about half the population contributing to that factor, however this is only because the United States runs specifically on capitalism and consumerism, so every citizen contributes one way or another. America uses high energy and fossil fuel consumption with high functioning biological resources in carbon cycling. So although comparing California to France (because California has a larger footprint.), it's not a fair comparision due to technology

4 0
4 years ago
Quinn is a six-month-old baby girl who was born preterm. she now weighs 13 pounds. click on the link below to access a growth ch
Dafna11 [192]
We cant access the link?
4 0
4 years ago
42.
stepladder [879]

Answer:

Option B, Genetic engineering

Explanation:

Biodiversity determines the different types of species living in a given area. Hence it is incorrect

Bioremediation is basically a waste management system in which organisms are used to break down hazardous substances into less toxic substances. Hence, it is also incorrect

Hemodialysis is used to remove or filter out wastes and water from blood. Hence, it is also incorrect  

Genetic engineering is used to produce organism with desired trait by altering their DNA and hence the associated Phenotype. Thus, it is the correct answer

Hence, option B is correct

6 0
4 years ago
Read 2 more answers
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