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Natasha2012 [34]
3 years ago
12

Which of the following structures is an extension of the petiole into the leaf blade?

Biology
2 answers:
love history [14]3 years ago
6 0
c.midrib. The petiole is a stalk arising from the stem of the plant that connects the stem to the leaf blade. In the middle of the leaf blade is the midrib, which is an extension of the petiole.
aksik [14]3 years ago
5 0

Answer:

the answer is C

Explanation:

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muminat
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6 0
3 years ago
A mutation in _____ results in a change in _____ that sometimes produces a(n) _____ with altered structure and function.
xenn [34]

Answer:

A mutation in <u>DNA </u>results in a change in <u>RNA </u>that sometimes produces a <u>protein </u>with altered structure and function.

Explanation:

DNA is the hereditary material which causes gene expression in our body by producing protein. The type of protein which is produced by DNA totally depends upon the sequence of nucleotides in the DNA. But, DNA molecule does not produce protein directly. Initially it produces RNA (mRNA, tRNA, rRNA) by the process of transcription, the nucleotides in the RNA are complimentary to those in DNA. In short, the message regarding the structure and composition of the type protein to be produced by DNA is first decoded from DNA in the form of RNA. These RNA molecules then synthesize the protein as per the instructions from DNA by the process of translation.

But, in case a mutation occurs in the DNA which causes a change in it's nucleotide/nucleotides, the protein which will be produced will be different in the structure and function than the protein which was supposed to be synthesized. It happens because, a triplet of nucletiodes in the DNA and hence RNA specifies a particular type of amino acid and several amino acids are joined in a long chain to form polypeptide which ultimately forms protein. But, if any nucleotide in the triplet is changed due to mutation it may change the amino acid and if amino acid will change the protein will also get altered.

3 0
3 years ago
Which statement best explains the impact of favorable oceanic conditions on the Geosphere?
GREYUIT [131]

Answer:

The best answer is "Ocean waves add more sand to beaches"

Explanation:

based on statement above, the oceanic conditions are changes in ocean parameters (temperature and movement) and substances which contain in oceans (salinity, nutrient availability, oxygen and carbon dioxide level, etc).

Geosphere is a part of the earth that included the earth's interior, landform, rocks, and mineral. There are lithosphere, atmosphere, hydrosphere, biosphere and, anthroposphere.

on the answer choice, the ocean wave is the example of the oceanic condition which has changed in movement. and the beach is an example of the lithosphere.

3 0
3 years ago
Xylem _____.
ladessa [460]
Xylem tissue that should help you out
7 0
3 years ago
A student visits the beach during a very hot day, she steps on the sand and jumps because it is so hot, what type of heat transf
koban [17]
Conduction because the heat is coverted from the sun to the sand to her foot
6 0
3 years ago
Read 2 more answers
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