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3 years ago

Why In type of hot ,dry,weather , some cities ban the use of garden sprinklers

1 answer:

6 0

Lets take Georgia for example. When in a time of hot and dry weather, there is little moisture in the air, meaning that if something or someone were to catch on fire, it would spread easily. Most likely if the city bans the use of garden sprinklers, it is to conserve water for a better usage such as drinking or bathing water.

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Which of the following is a food chain in the food Web, tree, deer, mountain lion, fox; grass, caterpillar, robin, hawk; grass,

Lunna [17]

Food chain is a sequence of living organisms that eat one another. The goal is energy and nutrition flow in the ecosystem from one organism to another.
From the given options, the following are food chain in the food:
grass -> grasshopper -> snake -> hawk
It is a linear pathway. The hawk eats snake, the snake eats the grasshopper and the grasshopper eats grass.

4 0

3 years ago

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In humans, Rh-positive individuals have the Rh antigen on their red blood cells, while Rh-negative individuals do not. If the Rh

bixtya [17]

Answer: 60%

Explanation:

In population genetics, the Hardy-Weinberg Principle states that the genetic composition of a population remains in equilibrium as long as no natural selection or other factors are active and no mutations occur.

The frequencies of the genotypes of an individual locus will be set to a particular equilibrium value. It also specifies that these equilibrium frequencies can be represented as a simple function of the allelic frequencies at that locus. In the simplest case, with a locus with two alleles A and a, with allele frequencies of p and q respectively, the principle predicts that the genotypic frequency for the dominant homozygous AA is p^2, that of the heterozygous Aa is 2pq and that of the recessive homozygous aa, is q^2. The allele frequency of a is represented as p and the frequency of recessive allele is q.

The three genotypes AA : Aa : aa appear in a ratio p² : 2pq : q². If we add them up, we get the unit:

p^2 + 2pq + q^2 = (p + q)^2 = 1

And p + q = 1

Rh-positive genotypes are represented as AA (homozygous dominant) or Aa (heterozygous) since the presence of a single dominant allele is sufficient to express the phenotype. While Rh-negative genotypes are represented as aa.

If 84% of the population is Rh-positive, that means that this percentage includes all those who are AA and Aa. Then 16% are aa.

F(aa)=q^2=0.16

then F(a)=q=0.4

And since p + q = 1, p + 0.4 = 1, then p is 0.6

We can also calculate the rest, then F(AA)=p^2= 0.36

So F(Aa)= 2pq = 2 x 0.6 x 0.4 = 0.48

Notice that 0.36 + 0.16 + 0.48 = 1

3 0

3 years ago

What is the ozone layer

mestny [16]

Answer:

A portion of the Earth's atmosphere that protects the Earth from radiation

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3 years ago

many radioactive atoms that have large masses undergo radioactive decay by releasing a particle that is identical to a helium-4

igomit [66]

The answer is the atomic number and the mass number will decrease.

When atoms undergo radioactive decay, alpha particles release.

Alpha particles consist of two protons and two neutrons. So, mass is 4 (2+2) amu $^{4} _2 \alpha$ .
When an atom of emits an alpha particle, its atomic number will be reduced by 2 and a mass number will be reduced by 4:

$^{A}_ZX$ → $^{A-4}_{Z-2}X$ + $^{4}_{2} \alpha$

6 0

3 years ago

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Sleep, hunger, and thirst are all

Arte-miy333 [17]

The answer is c
hope hep

3 0

3 years ago

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