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lidiya [134]
3 years ago
15

A common species of liverwort typically resembles a flat green ribbon that occasionally sprouts umbrella-shaped structures. If l

iverworts and mosses are very similar structurally, then the "ribbons" are __________ and the "umbrellas" are __________.
Biology
1 answer:
creativ13 [48]3 years ago
6 0

Answer:

1. Gametophyte

2. Sporophyte

Explanation:

The life cycle of the Liverwort and mosses which are placed in the Bryophytes is divided into the sporophytic and the gametophytic phase.

Gametophyte

The gametophyte is the dominant phase of the life cycle which appears like the ribbon, green in color and posses the gamete producing structure- the antheridium and the archegonium.  

Sporophyte

The gametes fuse to form the embryo and from that is produced the sporophyte structure, an umbrella-like structure called a sporangium. This sporangium produces the spores which later will form the gametophyte.

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Knowledge of the amino acid sequences is important for several reasons. What is NOT one of those reasons
kotegsom [21]

Complete question:

Knowledge of the amino acid sequences is important for several reasons. What is NOT one of those reasons

  1. Amino acid sequences determine the three-dimensional structures of proteins.  
  2. Knowledge of the sequence of a protein can help to prevent mutations.
  3. The sequence of a protein reveals much about its evolutionary history.
  4. The sequence of a protein is necessary to determine its function.

Answer:  

Knowledge of the sequence of a protein can help to prevent mutations.

 Explanation:  

<em>Amino acids connect to each other by peptidic bonds </em>to form a <em>linear polymer</em>. The number of amino acids composing the chain and the order in which they are arranged determines the primary structure of the protein.

The secondary structure is the folding that the polypeptide chain adopts thanks to the formation of <em>hydrogen bonds between the atoms that form the peptide bond.</em>

<u>Protein functions depend on their aminoacids sequences</u><u>.</u> <u>The primary structure of the proteins determines the three-dimensional one</u>. Proteins with different functions have different sequences. And among species, proteins with similar functions have similar structures.

By knowing the sequence of amino acids, we can predict the function of the protein and we can classify them into different families. Integrants of these groups have at least 25% of their sequences identical to each other.  

Also, the knowledge of the sequence allows establishing evolutionary and genetic relationships between different species.

When a mutation occurs in the sequence -an alteration in the primary structure- the protein function is modified. BUT knowing the sequence of a protein CAN NOT help to prevent mutations.

   

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Answer:

Studying cells helps us understand how organisms function. Cellular components work together to carry out life functions. Cellular processes enable organisms to meet their basic needs.

Explanation:

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<span>The pH of the solution affects the ionization of the R group of the amino acids in the enzyme. Changing the ionization affects the bonding of the protein. resulting in the affecting of the shape.  Therefore, the substrate binding to the site will lessen causing a reduce enzyme activity. But this depends on the type of enzyme and its optimum pH level.</span>
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