All categories

2 years ago

What causes the equinox to occur twice a year?

Biology

2 answers:

blondinia [14]2 years ago

4 0

Answer:

tilt and orbit of the Earth combine in a way that the axis is inclined away from the sun

Explanation:

We have an equinox twice a year. The Spring and Fall equinox. An equinox occurs when the tilt of the Earth's axis and Earth's orbit around the sun combine in such a way that the axis is inclined away from the sun.

vfiekz [6]2 years ago

3 0

Answer:

An equinox is an event that takes place in Earth's orbit around the sun. ... The equinoxes and solstices are caused by Earth's tilt on its axis and ceaseless motion in orbit. You can think of an equinox as happening on the imaginary dome of our sky, or as an event that happens in Earth's orbit around the sun.

Explanation:

You might be interested in

10 POINTS!!!! name 10 non-contact and contact forces

Anna11 [10]

Non contact- gravitational force, magnetic force, electrical force, nuclear force, electrostatic, electromagnetic, muscular movements, x-rays, radio waves, infrared, and visible light.

5 0

2 years ago

Phenylketonuria (PKU) is a disease caused by a recessive mutation. PKU is extremely common in Ireland, affecting approximately 1

aleksklad [387]

Answer:

97%

Explanation:

PKU is caused by a recessive mutation, which means that affected individuals are homozygous and recessive (tt).

The frequency of genotypes according to Hardy-Weinberg equilibrium is:

$TT= p^2\\Tt=2pq\\tt=q^2$

where p is the frequency of the T allele and q is the frequency of the t allele.

Affected individuals are 1 in 4500, which means the frequency of tt genotype is 1/4500.

If the population is in Hardy-Weinberg equilibrium,

$q^2=1/4500\\q=\sqrt{1/4500} \\\\q=0.015$

The sum of the allele frequencies adds up to 1, therefore:

p + q = 1

p= 1 - q

p= 1 - 0.015

p= 0.985

The frequency of the TT genotype (homozygous wild-type individuals) will be:

$p^2=0.985^2\\p^2=0.97$

97% of the population will have the homozygous wild-type TT genotype.

3 0

2 years ago

Which scenario would most likely cause a mass extinction?

Eva8 [605]

<h3>Answer;</h3>

A. global temperatures drop several degrees after several massive volcanic eruptions

<h3>Explanation;</h3>

A mass extinction refers to a widespread and a rapid decrease in the Earth's biodiversity.
Mass extinctions may occur due to a number of reasons which includes, asteroid impacts, climate change, massive volcanic eruptions or a combination of all these causes. 
An example of mass extinction was during the Mesozoic Era, that led to the extinction of dinosaurs, about 65 million years ago.

6 0

2 years ago

Read 2 more answers

Neporo4naja [7]

Answer:

biologie is klote, net zoals je nu doodgaat

5 0

2 years ago

What is the purpose of stimulus motives

Nimfa-mama [501]

Stimulus motives express our needs for stimulation and information .

5 0

2 years ago

Read 2 more answers