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2 years ago

Compare mechanical, chemical, and legislative control to the use of nonnative species as a control method.

1 answer:

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Non native species are organisms that do not naturally occur in a given area. They may have been transferred either accidentally or deliberately from their place of origin to the new area through human activities.

Non native species may become invasive species if they cause harm to the economy, human health, or environment.

Control methods used to eliminate invasive species are:
1) mechanical - physically removing the invasive species or changing the habitat condition of the affected area.
2) chemical - using of pesticides, fungicides, or herbicides to kill off invasive species.
3) legislative - introducing the natural enemy of the invasive species. It may be a predator or parasite that is from its native range.

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In Zambia, which lions are likely to have migrated from a different population?

Margaret [11]

Zambian lions are split into two subpopulations, with one in the Greater Kafue Ecosystem in the west and the other in the Luangwa Valley Ecosystem in the east. Between these two geographically different regions lies Lusaka, Zambia's largest city, which is surrounded by farmland. males travel long distances to find new prides, while females remain in or close to the pride they were born in. So, for the lion, it's primarily males that are responsible for the movement of genes between prides. This male-mediated gene flow explains the lack of gene flow seen in mitochondrial genes compared to that of nuclear genes—female lions aren't making the journey, but they do mate with new males who come from far away.

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2 years ago

Where are carbohydrates found in the body? And in cells?

slavikrds [6]

Hi,

Answer: The Liver

My work: Carbohydrates are usually located and converted in the Liver.

Extra Information: The body uses Carbohydrates as glucose. From there glucose can be converted to glycogen.

Words you might not know:

1) Converted - To change.

2) Glucose - Energy source.

3) Glycogen - Stores Carbohydrates

I Hope I Helped!

~KingJupiter

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2 years ago

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Relatively large areas of land and water ecosystems are needed to provide the resources used by a typical American, as identifie

crimeas [40]

This indicator is an estimate of the amount of space on the earth that an individual uses in order to survive using existing technology. This space includes the biologically productive land and water area that produces the resources consumed by that individual such as food, water, energy, clothing, and building materials. It also includes the amount of land and water required to assimilate the wastes generated by that person. In other words, the ecological footprint measures a person's demand on the bio-capacity of the Earth.

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2 years ago

Which part of an individual amino acid distinguishes it from other amino acids? which part of an individual amino acid distingui

Elenna [48]

Which part of an individual amino acid distinguishes it from other amino acids? Your Answer will be Side Chain ! Hope this Helps

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2 years ago

In the fruit fly, Drosophila melanogaster, a spineless (no wing bristles) female fly is mated to a male that is claret (dark eye

Korolek [52]

Explanation:

We have three genes in the same chromosome and are trying to determine their order and relative distance to each other.

The genes and possible alleles are:

claret (c/c+)
spineless (s/s+)
hairless (h/h+)

All mutations are recessive: two copies of the mutant allele are needed for the fly to show that trait.

Parental cross

claret hairless male: $\frac{s^+\ c\ h}{s^+\ c \ h}$
spineless female: $\frac{s\ c^+\ h^+}{s\ c^+ \ h^+}$

Each parent can produce 1 type of gamete only, so the F1 will be homogeneous:

F1

$\frac{\ s\ \ \ c^+\ \ h^+}{s^+\ \ c \ \ \ h}$

During meiosis, the F1 females can produce 8 types of gametes: 2 parentals and 6 recombinants (two of them, the result of a double crossing over).

If they are test crossed to homozygous recessive males (which can only produce a $\frac{s \ c\ h}{}$ gamete), the following phenotypes are obtained (I just write the alleles they inherited from the female fly, as the ones that came from the male are the same for all of them):

321 spineless (s c+ h+) ----> Parental
309 claret, hairless (s+ c h) ----> Parental
130 claret, spineless (s c h+) ----> Recombinant
140 hairless (s+ c+ h) ----> Recombinant
32 hairless, claret, spineless (s c h) ----> Recombinant
38 WT (s+ c+ h+) ----> Recombinant
18 claret (s+ c h+) ----> Double Recombinant
12 hairless, spineless (s c+ h) ----> Double Recombinant

The phenotypes observed in the highest frequency are always the parentals, and the ones in the lowest frequency are always the double recombinants.

To determine the order of the genes:

we have to write down the genotype of the F1 female three times, changing the order of the genes each time.
Then, we hypothesize what the double recombinant gametes would look like.
When the theoretical double recombinants we obtain are the same as the ones observed in the F2, we know that that is the correct order of the genes.

In this problem, only if the middle gene is h+/h the double crossing over gives us the observed double recombinant gametes, therefore hairless is the middle gene.

$\frac{s\ h^+\ c^+}{s^+\ h\ c}$

Double recombinants:

s h c+ ----> spineless hairless
s+ h+ c ----> claret

To determine the distance between the genes:

Genetic distance (m.u.) = Recombination Frequency x 100

Distance between the spineless and hairless genes:

$Distance \ [s-h]= \frac{number\ of\ recombinants \ [s-h]}{Total number of individuals} * 100\\\\\\Distance \ [s-h]= \frac{32+38+12+18}{1000} * 100\\\\Distance \ [s-h]= 10\ map\ units$

Distance between the hairless and claret genes:

$Distance \ [h-c]= \frac{130+140+12+18}{1000} * 100\\\\Distance \ [h-c]= 30\ map\ units$

<h3>The gene map for these genes is:</h3>

spineless -----------------hairless ---------------------------claret

10 m.u. 30 m.u.

3 0

1 year ago