Natural gas is very common in the United States. Natural gas forms in processes taking thousands of years. So, Natural gas is

Which of the following is not correct about diffraction?

kotykmax [81]

Answer:

Diffraction occurs just with electromagnetic waves.

Explanation:

8 0

3 years ago

How have scientific advancements been both beneficial and disadvantageous to society?

bekas [8.4K]

Answer:

For the benefits we have had improvements in communication and transportation which has caused an increase in economic growth.

For the disadvantages this causes (urbanization) will allows people to live in urban areas.

Explanation:

7 0

3 years ago

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How did stars affect life on Earth in the past?

brilliants [131]

Answer:

The reason why stars are so important is because they have helped humans navigate through Earth . When it was dark these stars would light up the sky giving people light . ... the most important is the Sun, because without that it wouldn't be life on Earth . Earth would just be a rock with ice.

Explanation:

4 0

3 years ago

why is the only path of conduction for impulse transmission from the atria to the ventricles through the av node and av bundle?

velikii [3]

Because the AV node takes on the role of a very important delay in the cardiac conduction system. Without this delay, the atria and ventricles would contract at the same time.

<h3>Cardiac conduction system</h3>

The conduction system of the heart sends electrical signals, usually generated by the sinus nodes, causing the heart muscle to contract. Pacemaker signals originating from the sinus node travel through the right atrium to the atrioventricular (AV) along the bundle of His and through branches of the bundle, causing myocardial contraction. This signal first stimulates contraction of the right and left atria then flows to the right and left ventricles. That electric current then allows blood to be pumped throughout the body.

Learn more about sequence of travel by an impulse through the cardiac conduction system at brainly.com/question/28269433

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7 0

1 year ago

Two dihybrid pea plants (both tall and with purple flowers) are mated. The cross resulted in 9866 progeny, of which 5550 were ta

d1i1m1o1n [39]

Answer:

<h2>616 Short with white flower </h2><h2>1850 Tall with white flower </h2><h2>1850 Short with purple flower</h2>

Explanation:

A dihybrid cross is in which two genes of two different traits are crossed

As given, two dihybrid pea plants (tall with purple flower) are mated, resulting 5550 out of 9866 were tall with purple.

T= tall

t= short,

P= purple,

p= white;

So genotype of parents are TtPp ; T is dominant over t, P is dominant over p.

Crossing between two parens= TtPp × TtPp

so gamets are = parent 1: TP, Tp, tP, tp and parent 2: TP, Tp, tP, tp

Hence the four different gametes formed.

Now arrange the gametes on the top and left side of a Punnett square it'll genotypically results into different combinations, by which phenotypic ratios can be calculated.

offspring are = TTPP, TTPp, TtPP, TtPp....................TTpp, Ttpp.....ttPP, ttPp.......ttpp

(T_P_)= Tall with purple flower,

(T_pp)= tall with white flower,

(ttP_)= short with purple flower,

(ttpp)= short with white flower.

so it show 12:3:3:1 ratio'

Phenotypic classes are:

616 Short with white flower

1850 Tall with white flower

1850 Short with purple flower

8 0

3 years ago