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2 years ago

How could a worldwide increase in temperature effect organisms?

2 answers:

7 0

Wildlife is dependent on the right habitats with proper temperatures, fresh water, food, resources, and places to raise the young. If climate changes occur, the natural resources such as water and plants would not be able to thrive as well in different weather conditions that differ from it regular climate. If the natural resources do not continue to thrive and expand, then surrounding habitats begin to die due to the lack of sufficient nutrients. Some animals are able to adapt to such changes by finding other resources to fulfill their needs or they'll be able to travel to a place with climate that is sufficient. Others are simply too weak without these resources to be able to adapt or travel. Temperature increase can cause species to become extinct or endangered. It truly has a big effect on organisms.

I hope this helps:)

Sav [38]2 years ago

4 0

Global warming, increasing temperature of the Earth, will permanently affect habitats which will result in multiple species moving to find a cooler place.The species deserting their home where they have been for thousands of years will unbalance the ecosystem causing long lasting damaging affects on Earth.

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4) A homozygous groucho fly ( gro, bristles clumped above the eyes) is crossed with a homozygous rough fly (ro, eye abnormality)

docker41 [41]

Answer and Explanation:

A homozygous groucho fly ( gro, bristles clumped above the eyes) is crossed with a homozygous rough fly (ro, eye abnormality).

The F1 females are testcrossed, producing these offspring: groucho 518 rough 471 groucho, rough 6 wild-type 5 1000 a) What is the linkage distance between the two genes? B) Plot the genes on a map c) If the genes were unlinked and the F1 females were mated with the F1 males, what would be the offspring in the F2 generation?

1st cross:

Parental) grogro ro+ro+ x gro+gro+ roro

F1) gro+gro ro+ro

2nd cross:

Parental) gro+gro ro+ro x grogro roro

Gametes) gro+ro+ gro ro

gro+ro gro ro

gro ro+ gro ro

gro ro gro ro

Punnet square)

gro+ro+ gro+ro gro ro+ gro ro

gro ro gro+gro ro+ro gro+gro roro grogro ro+ro grogro roro

F2)

0.518 grogro ro+ro (518 individuals)

0.471 gro+gro roro (471 individuals)

0.006 grogro roro (6 individuals)

0.005 gro+gro ro+ro (5 individuals)

Total number of individuals 1000

Note: These frequencies were calculated dividing the number of individuals belonging to each genotype by the total number of individuals in the F2.

To know if two genes are linked, we must observe the progeny distribution. If individuals, whos genes assort independently, are test crossed, they produce a progeny with equal phenotypic frequencies 1:1:1:1. If we observe a different distribution, that is that phenotypes appear in different proportions, we can assume that genes are linked in the double heterozygote parent.

In the exposed example we might verify which are the recombinant gametes produced by the F1 di-hybrid, and we can recognize them by looking at the phenotypes with lower frequencies in the progeny.

By performing this cross we know that the phenotypes with lower frequencies in the progeny are groucho, rough and wild-type. So the recombinant gametes are gro+ro+ and gro ro, while the parental gametes are gro+ro and gro ro+.

So, the genotype, in linked gene format, of the double heterozygote individual in the F1 is gro+ro/gro ro+.

To calculate the recombination frequency we will make use of the next formula: P = Recombinant number / Total of individuals. The genetic distance will result from multiplying that frequency by 100 and expressing it in map units (MU). One centiMorgan (cM) equals one map unit (MU).

The map unit is the distance between the pair of genes for which one of every 100 meiotic products results in a recombinant product.

The recombination frequency is:

P = Recombinant number / Total of individuals

P = 6 + 5 / 1000

P = 11 / 1000

P = 0.011

The genetic distance between genes, is 0.011 x 100= 1.1 MU.

Genetic Linkage Map:

Parental Phenotypes)

-----gro+------ro---- -----gro------ro+----

----- gro ------ro---- ---- gro------ ro ----

Recombinant phenotypes)

-----gro+------ro+---- -----gro------ro----

----- gro ------ ro---- -----gro------ro----

If the genes were unlinked and the F1 females were mated with the F1 males, the offspring in the F2 generation would have been

4/16 = 1/4 gro+gro ro+ro

4/16 = 1/4 gro+gro roro

4/16 = 1/4 grogro ro+ro

4/16 = 1/4 grogro roro

Their phenotypic frequencies would be 1:1:1:1 related.

7 0

3 years ago

animals cannot produce enzymes to digest cellulose, yet many termite species consume cellulose from plant material as a main par

dimaraw [331]

Answer:

Termites have cellulose-digesting protists in their guts.

Explanation:

Termites are able to access nutrients contained in cellulose due to their mutualistic association with some cellulose-digesting protists such as Trichonympha and Mixotricha. The protists produce cellulase in addition to other glycolytic enzymes that work together to convert cellulose to malate.

The malate produced is further metabolized to produce $CO_2$ , hydrogen, acetate and energy in the form of ATP.

The protists get sheltered in the termite's gut in return.

8 0

2 years ago

What causes changes in air pressure in the atmosphere

harina [27]

Answer:

Air pressure is caused by the weight of the air molecules above

Explanation:

Air pressure is caused by the weight of the air molecules above. Even tiny air molecules have some weight, and the huge numbers of air molecules that make up the layers of our atmosphere collectively have a great deal of weight, which presses down on whatever is below.

5 0

3 years ago

Scientists have been able to inject the firefly's lighting gene into a tobacco plant, allowing it to glow. Which type of organis

olga nikolaevna [1]

This tobacco plant is an example of a genetically modified organism.

3 0

3 years ago

Help me with this biology question please

oksano4ka [1.4K]

The answer is A p is the frequency of the dominant allele. So the p squared would be the frequency of the homozygous dominant allele because homo means the same.

5 0

3 years ago