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CaHeK987 [17]
3 years ago
11

Organisms that cannot make their own food and must obtain energy from external sources are called....

Biology
2 answers:
Studentka2010 [4]3 years ago
8 0
An organism that makes its own food with only the help of sunlight would be and Autotroph, i think thats your answer
jolli1 [7]3 years ago
3 0

The answer is heterotroph

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Crops are protected from disease-causing fungi by use of fungicides or by the use of genetically engineered fungi-resistant crop
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Correct answer: C). Fungicides interfere with fungal growth and reproduction, while genetic engineering produces plants resistant to fungi.  

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In genetic engineering, the DNA of plants is altered in such a way that it produces a toxic protein, which will kill the fungi when it tries to infect them or slow down the growth of the plant.






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In a population, when the birthdate becomes higher than the death rate, the populations growth rate
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Answer:

if birth rate become higher than the death rate then the population will increase surely, cuz there are more people who add up to form a population but it's decline rate is lesser.

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noname [10]
15

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However, keep in mind that this only represents 1/2 strands that make up DNA. If you are supposed to include the other strand, simply double 15, and there would be 30 nucleotides total. However, only 1 strand is actually required in order for protein synthesis to work, so I think it's just 15.
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Explain the roles of mrna and trna in protein synthesis.
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Answer:

mRNA is transcribed from DNA.

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Explanation: FOR REAL THE FACTS

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