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Nostrana [21]
3 years ago
14

What are the differences among tree species according to leaf shape?

Biology
1 answer:
olchik [2.2K]3 years ago
7 0
<span>The arrangement of leaves on a stem shows the differences in trees , and this helps identify a tree during the growing season. The presence or absence of lobes on a leaf can also identify the species of a tree. The leaves also vary in shape, which indicates the position that it has on the tree. Also, some leaves are simple leaves, and others are compound leaves. Vein patterns and leaf edges can also indicate the type of tree that a leaf came from.</span>
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What is the name for an organized group of organisms
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4 0
3 years ago
Which of the following macromolecules enter the nucleus of a eukaryotic cell through pores in the nuclear membrane? a. rRNAb. ri
Lina20 [59]

Answer:option C= mRNA

Explanation:

MACROMOLECULES are large molecules, such as protein, commonly created by the polymerization of smaller sub-units called monomers.

The NUCLEAR PORE is a protein-lined channel in the nuclear envelope. The NUCLEAR PORE regulates the transportation of molecules between the nucleus and the cytoplasm. In eukaryotic cells, the nucleus is separated from the cytoplasm and surrounded by a nuclear envelope.

mRNA is synthesized by DNA during a process known as the TRANSCRIPTION. After the synthesis, the new molecule moves from the nucleus to the cytoplasm. It passes through the nuclear membrane through a NUCLEAR PORE. Then, it will later join with a ribosome, which is just coming together from its two sub-units, one large and one small.

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What is a food chain/6067896/d633c784?utm_source=registration
Vsevolod [243]
Food chain-  is a diagram that shows how food energy moves from one organism to another in an environment. It begins with the plant life and ends with animal life. Plants get eaten by animals  and animals eat other animals. 
7 0
4 years ago
The results of the rapid strep test were negative, but the rapid flu test was positive for the influenza virus, type
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4 years ago
A geneticist isolates a gene for a specific trait under study She also isolates the corresponding mRNA Upon comparison, the mRNA
olga nikolaevna [1]

Answer:

C) no, the final mRNA contains only exons, the introns were removed

Explanation:

Exons are the coding areas while the introns are non-coding areas. Both of these are the sequences of nucleotide within a gene.

RNA splicing is a process which usually occurs as the RNA matures, causing the removal of introns ( non coding areas of the RNA ) i-e they will not be expressed in the final messenger RNA, while exons continue to form covalent bonds with one another to form a  mature mRNA.

So in the given scenario, Upon comparison, the mRNA is found to contain 1,000 fewer bases than the DNA sequence because the introns were removed by RNA splicing.

Hence option C) no, the final mRNA contains only exons, the introns were removed is correct.

5 0
3 years ago
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