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adelina 88 [10]
3 years ago
9

Help! My cat has done this 3 times. She falls over, starts kicking her leg, and biting it or biting her tail. She usually doesn’

t do this! What’s wrong with her???
Biology
1 answer:
Nataly_w [17]3 years ago
7 0
This pet needs to be taken to the vet ASAP
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What fibrous structure functions to anchor the atrioventricular valves in a closed position?
FromTheMoon [43]

Answer:

Chordeae tendineae

Explanation:

  • Chordeae tendineae keep the atrioventricular valves in place while heart is pumping the blood.
  • Chordeae tendineae are commonly known as heart strings and these are tough tendious strands in the heart.
  • Chordeae tendineae are 80% collagen and 20% elastin and endothelial cells.

4 0
2 years ago
Need a hypothesis for “How are proteins built from RNA”
Dima020 [189]

Hi!


Hypothesis:

<em>Proteins are built from the translation of messenger RNA (mRNA) molecules</em>


RNA, or ribonucleic acid, is a structure that is similar to DNA, except that it exists as a single strand, consists of a ribose sugar instead of a deoxyribose sugar and has the base uracil (U) instead of thyamine (T).


<h3><u>From DNA to RNA</u></h3>

RNA is generated through transcription of the DNA molecule, resulting in a <em>complementary </em>molecule of the template DNA strand. For instance, if the sequence of the DNA was:

ATGCGCAGTTATTGCGAT

The corresponding RNA sequence will be:

UACGCGUCAAUAACGCUA    <em>(complementary with U instead of T)</em>


<h3><u>From RNA to Protein</u></h3>

The RNA molecule in our case is known as the mRNA. After transcription the mRNA molecule is transported to the cytoplasm, where a ribosome binds to it for another molecule to translate the sequence. This translation is mediated by an RNA molecule known as the tRNA molecule which enters the ribosome to catalyze the reaction.

These molecules identify a sequence of 3 bases (codon) and for specific codon sequences, the tRNA allocates specific amino acid. For instance, for the codon <em>UCA</em>, the tRNA will allocate a <em>Serine residue.</em>

This translation process starts at specific three base sequences, known as start codons, and terminates at specific three base sequences known as stop codons.

In this manner, a sequence of amino acids respective to the mRNA codon sequence is synthesized, and as we identify proteins as chains of amino acids that are covalently linked together through peptide bonds, we can clearly see that proteins are built directly from RNA, and indirectly from DNA.


Hope this helps!


3 0
3 years ago
The large number of alveoli in lungs improve diffusion by ____.
nekit [7.7K]

Answer: a. Increasing the surface area for diffusion

Explanation:

When the air is inhaled through the nostrils, the air containing the oxygen the air diffuses inside the alveoli. The alveoli are the tiny sacs where air enters and exchange of gases takes place. From the alveoli the oxygen enters into the blood stream. The oxygen is utilized by the cells for respiration. The increase in network and number of the alveoli will increase the surface area for the diffusion of oxygen and hence, will speed up the respiration process.

6 0
2 years ago
List the order of Producers that colonize the land After Lichens
olasank [31]

Answer:

Plant is a common example of a Producer.

Producers are also known as autotrophs.They are organisms which make their own food. They do so by getting energy from chemicals or the sun and with the help of water convert the energy into useable forms such as sugar.

The order of Producers that colonize the land After Lichens include

Annual herbaceous plants

Perennial herbaceous plants and grasses

Shrubs

Shade intolerant trees

Shade tolerant trees.

8 0
3 years ago
Owls eat mice.what do we call the mice?<br> A.prey<br> B.predators<br> C.nutrients
jasenka [17]

Answer:

A.prey

Explanation:

The owl would be called the predator because it is going after the mice. Therefore, the mice would be called prey. Mice are also nutrients but, nobody uses that word in this situation.

7 0
3 years ago
Read 2 more answers
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