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Alexeev081 [22]
3 years ago
14

In an aquatic ecosystem, the aquatic plants are eaten by small invertebrates that in turn are eaten by crayfish, the crayfish ar

e eaten by fish, and the fish are eaten by ducks. based on this, which of the following is incorrectly matched?
Biology
1 answer:
VladimirAG [237]3 years ago
6 0
The fish are eaten by ducks. Ducks cannot really swallow preys that are too big for their throats. They usually swallow organisms that are a lot smaller than fishes. because they do not have the capacity to bite and chew their preys. 
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Prolonged periods of drought in an area cause decreases in plant population
Alexeev081 [22]

Answer:

D -herbivore population sizes decrease ,then the carnivore population sizes decrease

7 0
3 years ago
PLS HELP I WILL GIVE BRAINLIST
ra1l [238]

There are four bases found in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). Adenine forms a base pair with thymine, and cytosine forms a base pair with guanine. There is a one-to-one relationship in these base pairings (Chargaff’s rule), which means that if you know the percentage of any one of them within a given DNA sample, you can calculate the percentages of the other three. In this case, you're given the percentage of guanine, and you want to find out the percentage of adenine.

Since guanine base-pairs with cytosine and since there must be as much cytosine as there is guanine, 41% of the bases in this gene are cytosine as well. That means that adenine and thymine <em>together </em>make up the remaining 18% (100% − 41% G − 41% C) of the base pairs. If there must be an equivalence in the number of thymine and adenine bases per Chargaff's rule, then half of the remaining base pairs must comprise adenine and the other half comprise thymine. Half of 18% is 9%.

Thus, adenine makes up 9% of the bases in this gene.

5 0
3 years ago
Assume that a mutation in the dna occurs so that the fourth base (counting from the 5' end) of the messenger rna now reads a rat
aleksandrvk [35]

Methionine-methionine leucinelysine that a mutation in the DNA occurs so that the fourth base (counting from the 5' end) of the messenger RNA.

mRNA codons are read from 5' to 3' , and they specify the order of amino acids in a protein from N-terminus (methionine) to C-terminus. The mRNA sequence is: 5'-AUGAUCUCGUAA-5'

Ciodons which is broke the sequence into a series of three-nucleotide units. There are three-letter nature of codons that the four nucleotide found in mRNA such as  A, U, G, and C  all these can produce a total of 64 different combinations. The sequence of the tRNA anti-codon is 3'-UGC-5' and the tRNA will carry the amino acid which is the encoded by the codon.

To learn more about nucleotide here

brainly.com/question/13185536

#SPJ4

4 0
2 years ago
Observations and inferences are important in science. How would you explain the differences between the two words?
Andrews [41]

Explanation:

when you Observe, you describe what you are seeing at the moment. so observation means seeing.

inference is the result you receive by observation.

for example, "I threw a stick and the dog ran after it and brought it back to me" this is an observation. you don't mention the reason why the dog brought you the stick. you just describe what happened!

but if you say, "the dog was trained to bring back the stick." you are mentioning the reason of the dog's behavior and that's inference.

7 0
3 years ago
Which of these is what DNA and RNA are? *
olya-2409 [2.1K]

Answer: DNA and RNA are both examples of nucleic acids

They consist of a strand of nucleotides with a phosphate group, a 5′ sugar and a nitrogenous base.

Extra info: DNA and RNA molecules are polymers. DNA is double stranded, whereas RNA is single stranded.

The nucleotides of DNA can pair together by base pairing, creating a strand that is complementary to its pair

Various types of RNA exist which have roles in protein synthesis as well as regulation of cellular programmes by fine-tuning gene expression.

4 0
3 years ago
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