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Tamiku [17]
3 years ago
13

What indicates a river valley on a topographic map and how do you

Biology
1 answer:
NikAS [45]2 years ago
5 0

A blue line indicates that there is water running through the valley. If there is not a blue line the V pattern indicates which way water flows.

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What is the purpose of operons in prokaryotes?
Tems11 [23]
The operon is effectively the center of transcriptional control. In addition to its main structural genes, the operon houses an operator and a promoter. In front of the promoter lies a regulatory gene that produces repressor proteins. When a repressor is in its active state, it binds to the operator.
Hope this helped.
4 0
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Which part of the neuron contains the nucleous
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3 years ago
The spindle apparatus disintegrates during _____. anaphase telophase interphase metaphase
IRINA_888 [86]

Answer;

-Telophase

Explanation;

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6 0
3 years ago
Read 2 more answers
Explain how the use of a chemical designed to kill grasshoppers could reduce the population of peregrine falcons.
Butoxors [25]
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6 0
3 years ago
Why are chloroplasts absent in epidermal cells ?
const2013 [10]
<em>the function of epidermis is to protect the leaf
make it air tight 
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also it is transparent and allows all light to enter...
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    as epidermis is not specialized to carry out photosynthesis... so it does not have any chloroplast...</em>
6 0
3 years ago
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