BIOLOGY COLLEGE

There are two species of freshwater shrimp that are introduced to a pond. The first species, Caridina cantonensis, is brightly colored with red and white stripes. The second species, Caridina multidentata, is more mottled drab in coloration. Fish have an easier time finding and eating Caridina cantonensis due to their bright colors. When each of these species reproduce they produce about 100 offspring, but only 30% Caridina cantonensis offspring survive to reproductive age, while 75% Caridina multidentata offspring survive to reproductive age. In this situation what is natural selection selecting for? In this situation what is natural selection selecting against? How do you predict this population will evolve? Identify how each of the listed conditions from the above scenario that influence natural selection.

Answers

Answer 1
Answer:

Explanation:

Natural selection is the mechanism that is responsible for the evolution of organisms.  

In the given case, the Freshwater shrimp has been introduced to a pond in which the two species with variations are introduced.  

The C. cantonensis is brighter in color whereas the C. multidentata is mottled drab in color. The predator fish can feed easily on the species which is brighter therefore C. cantonensis is more susceptible. The mottled drab species is not easily predated by the species.  

The 30 % offsprings of C. cantonensis can survive till the reproductive age  whereas 75% of C. multidentata. This shows that natural selection has acted on the color of the shrimp species selected against the predator fish species.

The species with mottled drab color is the result of the differential reproductive rate.
Answer 2
Answer:

Final answer:

Natural selection is favoring the Caridina multidentata species due to its mottled coloration providing protection against predators, and acting against the Caridina cantonensis species due to its conspicuous coloring. Higher survival rates to reproductive age in Caridina multidentata suggest that, over time, this species will increase in population assuming other environmental factors remain constant.

Explanation:

In the given scenario, natural selection is favoring the Caridina multidentata species. The mottled and drab coloration is providing higher survival rates by offering protection against predation. On the other hand, natural selection is acting against the Caridina cantonensis species which has bright colors that make it easily detectable by predators, leading to its lower survival rates.

The given conditions of coloration and survival rates to reproductive age influence natural selection. The higher survival to reproductive age in Caridina multidentata ensures the transmission of its color characteristics to a larger number of offspring. This leads to the prediction that over time, the population of Caridina multidentata will tend to increase compared to Caridina cantonensis, assuming all other environmental factors remain constant.

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ASAP PLEASE!!!!! Activation energy is the energy required to _____. A. complete a chemical reaction

B. start a chemical reaction

C. produce a catalyst

D. produce the reactants

Answers

Answer:

Option B is correct.

B. start a chemical reaction

Explanation:

Activation energy is the amount of energy that is needed to start a chemical reaction. To start a chemical reaction we have to provide this amount of energy. Different type of catalyst are used to lower the activation energy and catalyze the reaction.

Final answer:

Activation energy refers to the energy needed to initiate a chemical reaction, making 'B. start a chemical reaction', the correct answer to the question.

Explanation:

Activation energy is the amount of energy required to start a chemical reaction. It's the necessary energy to break the initial bonds of the reactants in a chemical reaction. Without adequate energy to pass this threshold, the reaction cannot proceed. For example, the energy required to start a fire (the reaction) is the heat from a match or lighter (activation energy). Once this energy threshold is surpassed, the reaction continues until the reactants are used up or another factor stops it. Hence, the correct answer to your question is B: start a chemical reaction.

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Why is a cap added to mRNA, but not to tRNA or rRNA?A-Transfer RNA and rRNA exhibit complex structures with double stranded regions. The three-dimensional shapes of these molecules keep the 5\' end of the RNA away from the enzymes that process the cap.B-Transcription and processing of mRNA occur in the nucleus, where cap binding proteins are found. These proteins, which add and modify the cap, are not found in the cytoplasm, where tRNA and rRNA are transcribed and processed.C-Each of the three types of RNA are transcribed by different RNA polymerases. Only RNA polymerase II, involved in mRNA synthesis, contains a domain capable of interacting with enzymes that form the cap.D-Only mRNA contains introns. Capping occurs simultaneously with intron removal because the same enzymes and proteins involved in both of these processes must bind to RNA at the same time.

Answers

Answer:

The correct option is C ' Each of the three types of RNA are transcribed by different RNA polymerases. Only RNA polymerase II, involved in mRNA synthesis, contains a domain capable of interacting with enzymes that form the cap.'

Explanation:

All the different type of RNA's undergo the process of transcription. However, their transcription is carried on by different types of RNA polymerases.

The transcription of the mRNA is carried by RNA polymerase II. The process of capping is essential so that the mRNA is stopped from degradation.

The rRNA is transcribed by RNA polymerase I which cannot add a cap tothe RNA.

The tRNA is transcribed by the RNA polymerase II, but the domain is different which cannot undergo the process of capping.

What is the nucleotide sequence of the dna strand that is complementary to 5'- atcgcaactgtcacta-3'? a 5'-tagcgttgacagtgat-3' b 5'-uagugacaguugcgau-3' c 5'-tagcgttgacagtgat-3' d 5'-tagtgacagttgcgat-3' e 5'-atcactgtcaacgcta-3'?

Answers

The correct answer should actually be 3 TAGCGTTGACAGTGAT 5 but none you have given match. Hope this helps anyway need anymore help just ask :)

Final answer:

The complementary DNA strand to 5'- atcgcaactgtcacta-3' is 3'- tagcgttgacagtgat -5' (option 'a') because adenine pairs with thymine, and cytosine pairs with guanine.

Explanation:

The nucleotide sequence of the DNA strand complementary to 5'-ATCGCAACTGTCACTA-3' follows the established base pairing rules in DNA. These rules dictate that adenine (A) pairs with thymine (T) and cytosine (C) pairs with guanine (G). Therefore, the complementary DNA strand is 3'-TAGCGTTGACAGTGAT-5'.

This complementary sequence is crucial in DNAreplication, where the two strands of the double helix separate, and each strand serves as a template for the synthesis of a new strand following the base-pairing rules. This process ensures the faithful transmission of genetic information and is fundamental to the biology of all living organisms. So, the correct option is 'a.'

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Although this moss plant undergoes alternation of generations and has two distinct body forms, its life cycle began as a A) seed. B) single cell. C) haploid gamete. D) cluster of cells.

Answers

The Answer fam is B) Single Cell
Hello to fully answer your question it would be (A. seed
If you need a more in depth explaination just comment down below

     Signed by, Virtuoso Sargedog

The glomerular filtrate contains a lower concentration of _____ than does blood plasma.

Answers

Albumin.
Hope this helps

In photosystem I, P700 transfers an a. electron to chlorophyll (A0) upon excitation by a photon.
b. The electron is replaced by electrons generated by the proton gradient.
c. electrons donated directly from plastoquinone at QA.
d. the splitting of water molecules at the manganese center.
e. oxidation of pheophytin. electrons donated from NADPH.
f. electrons transferred from plastocyanin.

Answers

Answer:

A

Explanation:
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