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astra-53 [7]
2 years ago
11

how is it possible that when you look at the night shy you may be looking at stars from millions of years ago

Biology
1 answer:
kolbaska11 [484]2 years ago
3 0

Answer:

this is beacuse stars are always in the sky

Explanation:

stars are always in the sky they are in the sky we just cant see it through our naked eye.. Also, while those super-massive stars will die suddenly as supernovae, most stars experience much slower deaths taking hundreds of thousands or millions of years to play out. Examples of famous stars already in the act of dying include Arcturus and Aldebaran.

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!!!!!!!!!!!!!!!!!!!!!!!!!!!!!PLEASE HELP ASAP I NEED TO COMPLETE THIS TEST IT IS A REALLY HIGH GRADE!!!!!!!!!!!!!!!!!!!!!!!!!!
LenKa [72]

Answer:

The main purpose of the circulatory system is to transport blood, oxygen, nutrients and hormones to and from different cells and tissues throughout the body.

Explanation:

This system works hand-in-hand with the respiratory system to facilitate the exchange of oxygen and carbon dioxide within the blood per the alveoli in the lungs.

7 0
3 years ago
Explain the purposes of gene expression studies. Describe the use of DNA microarray assays and explain how they facilitate such
denis-greek [22]

Answer:

Both gene expression and DNA micro array study about the expression of gene during different stages of development.

Explanation:

The main purpose of gene expression studies is to determine the level of mRNA expressed at different stages of transcription in a tissue or at different stages of cellular development. If a gene is not “ON” during synthesis of RNA and protein, then the desired proteins are not produced. Such studies allow us to turn on such genes.  

DNA microarray  assays easily identify and determine the network of gene expression across the entire genome. The common application of DNA microarray include – mutation analysis and detection, assessment of gene cop, immunoassays etc.

4 0
3 years ago
In what type of cells is smooth er abundant
Temka [501]
I think the answer is Specialized cells!
7 0
3 years ago
Many cells produce chemicals called _______, hormone-like substances that impact inflammation and reproduction.
Grace [21]

Answer:

vesicles

Explanation:

4 0
3 years ago
What are the functions of the three major forms of RNA (ribosomal RNA, messenger RNA, and transfer RNA)?
vovangra [49]

Answer:

Ribosomal RNA: Structural part of ribosomes

Messenger RNA: Carry genetic information from DNA to proteins

Transfer RNA (tRNA): Transport amino acids to protein synthesizing complex.

Explanation:

Ribosomes are made up of ribosomal RNA (rRNA) and proteins. The catalytic activity for the formation of peptide bonds between amino acids during protein synthesis resides the RNA of ribosomes.  

Messenger RNA (mRNA) is formed by the process of transcription during which the nucleotide sequence of the template DNA strand is copied into that of the RNA. The mRNA serves as a template for protein synthesis. The nucleotide sequence of mRNA is read in the form of genetic codes to specify the amino acid sequence of a protein. In this way, the genetic information stored in DNA is carried to the proteins.

During the process of protein synthesis, tRNAs carry amino acids to the mRNA-ribosome complex so that the amino acids are incorporated into the polypeptide. For the purpose, there is a tRNA with a specific anticodon sequence for a particular amino acid.  

3 0
3 years ago
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