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AleksandrR [38]
3 years ago
8

Dinobryon is a species of protozoa that reproduce asexually. How can this asexual reproduction be harmful to the species? A.They

do not use up any energy finding mates. B.They use more cellular energy in reproduction. C.Their population does not grow too quickly. D.They have less genetic diversity in their population
Biology
2 answers:
lys-0071 [83]3 years ago
7 0
I would say D. They have less genetic diversity
.
PolarNik [594]3 years ago
6 0

Answer:

Option D, They have less genetic diversity in their population

Explanation:

Asexually reproducing organism produces offspring that are identical to them. There is no diversity which means the offspring produced asexually are anatomically , structurally and genetically the same.  

Due to this, there can be no genetic improvisation in asexually reproducing species. Suppose in case if some genetic disorder arises in the parents , then the  same disorder shall appear in all the offspring . However, in case if these parents have reproduced sexually, then there would have been chances of nullifying the effect of genetic disorder not in all but at least some of the offspring.

Hence, option D is correct

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Answer:

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E. Viruses are as old as Bacteria and Archaea

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Answer:

August 11, 2014 — Six years ago, the Norwegian coast guard filmed a Scottish fishing vessel riding gray swells, dumping 5 metric tons of dead fish back into the North Sea. Over the European Union catch quota, and so unable to keep all the fish they’d caught, the fishermen had to ditch some. To the Norwegians, who aren’t part of the EU and hold a strict discards ban, the waste was shocking.

When this news reached Dan Watson, a young British designer, it became the inspiration for SafetyNet, an ocean fishing net that allows certain fish to escape via lighted rings, offering more catch selectivity. The Scottish fishermen’s predicament, he believed, was driven by their lack of control. “There can be no villains, there can be no victims, there are just problems,” Watson says. “I started this project because I wanted to go some way towards solving that problem.”

Bycatch can result in overfishing, reduces the population of species that might already be endangered and, on the largest scale, interrupts food chains and damages whole ecosystems.

Watson joins a growing number of innovators designing more selective fishing gear to reduce bycatch — the unwanted fish, dolphins, whales and birds that get scooped up by longlines, gillnets and trawlers each year and then discarded. Globally, the amount of marine life that is wasted or unmanaged — which makes it potentially unsustainable — forms about 40 percent of the catch. “The way we catch now is to catch everything, decide what we want to keep, and discard the rest,” says Martin Hall, head of the bycatch program at the Inter-American Tropical Tuna Commission, which regulates tuna fishing in the eastern Pacific Ocean. Bycatch can result in overfishing, reduces the population of species that might already be endangered and, on the largest scale, interrupts food chains and damages whole ecosystems. It also amounts to an enormous waste of valuable fish protein.

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To designers building better nets and lines, bycatch isn’t viewed as an inevitability, but as something we can phase out, piece by piece. It’s also seen as a battle that needs to be fought alongside fishermen, not against them.

Rethink the Game

Speaking from his trawler, the 45-foot Proud Mary, off the coast of Massachusetts, one such fisherman, Christopher Brown, says that over the years, fishermen have had to “rethink the game.” Brown operates a fishery that’s almost completely free of discards; is the board president of the Seafood Harvesters of America, an organization representing stewardship-minded fishermen; and has designed a squid net that reduces bycatch. The net contains an escape route at its base that exploits the bottom-dwelling behavior of unwanted flounder, encouraging them to flee the net through this gap. “We need to look at things entirely differently than we have in the last 30 years,” Brown says — and new gear is part of that equation. “It’s a matter of enlightened self-interest.”

Explanation:

Hope it helps

6 0
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A scientist is trying to find a method to artificially produce a protein that is found in a pig kidney what would be the first s
dedylja [7]

Answer:

The initial step of producing protein in a pig kidney artificially may involve the study of number mRNA produced by kidney.

Explanation:

As the protein is produced mainly in the kidney by studying the mRNA produced in it. It shows the locations of kidney elevated proteins such as the – proximal tubules, glomeruli etc. The maximum amount of proteins is seen in the genes, present in the kidney.

The whole system of kidney shows that the gene expression is shared mostly with the liver.  So while producing the artificial protein in pig kidney, the number of mRNA should be considered.

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