Explain why some organisms can be both a primary and secondary consumer

2 answers:

5 0

Some organisms can be both primary and secondary consumers depending on their position in the food chain. There are some organisms that are omnivores-- an organism that consumes both plants and animals. A perfect example of an omnivores are humans. Humans both consume plants and meat of animals. They can be primary consumers when they directly eat vegetables and fruits. They can also be secondary consumers when they consume the meat of a cow, wherein the cow is the primary consumer who eats plants.

AURORKA [14]4 years ago

5 0

Because the organisms could be omnivores, meaning that they consume the producers (primary) and also feeds on the organisms in the primary sector (secondary)

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If a radioactive nuclide has a half-life of 1.3 billion years and it is determined that a rock contains 25% of its original amou

shtirl [24]

A=P(1/2)^(t/h)
A=final amount
P=initial amount
t=time
h=half life

so
h=1.3 billlion (just write 1.3 and remember to mulipy the end time by 1 billion)

and final amount is 25% of original or 0.25P
0.25P=P(1/2)^(t/1.3)
divide both sides by P
0.25=(1/2)^(t/1.3)
take ln of bot sides
ln(0.25)=ln((1/2)^(t/1.3))
property of logarithms
ln(0.25)=(t/1.3)ln(1/2)
divide both sides by ln(1/2)
(ln(0.25))/(ln(1/2))=t/1.3
times both sides by 1.3
(1.3ln(0.25))/(ln(1/2))=t
remember that this is billion so
(1,300,000,000ln(0.25))/(ln(1/2))=t
2600000000.0001=t
about 2.6 billion years

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Given the mRNA sequence below, what would tRNA anticodons be in response? A-U-G-C-C-U-A-C-G-G-G-G-G-C-C-A

Lesechka [4]

Answer:

U-A-C-G-G-A-U-G-C--C-C-C-C-G-G-U

Explanation:

The mRNA (messenger RNA) is produced via the process of TRANSCRIPTION, which is the first stage of gene expression in living cells. The mRNA sequence formed is further read in the ribosomes in a group of three nucleotides called CODONS. This reading is done by another type of RNA called transfer RNA (tRNA).

The tRNA uses a set of three nucleotide bases that are complementary to that of the mRNA codons called ANTICODON. The anticodons are complementary to the mRNA codon i.e. A on the mRNA sequence will be read and recognized by U on the tRNA anticodon.

Hence, given the mRNA sequence: A-U-G-C-C-U-A-C-G-G-G-G-G-C-C-A, the tRNA anticodons that will read this sequence will be: U-A-C-G-G-A-U-G-C--C-C-C-C-G-G-U

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