Which of the following will be the final stage in the sun’s life cycle? A. nova stage
B. red giant stage
C. planetary nebula stage
D. black dwarf stage

Answers

Answer 1

Answer:

Answer: B. red giant stage

When the sun runs out of fuel-hydrogen, its atmosphere expands and it becomes a red-giant star. The Sun would leave the main-sequence stage and enter the red-giant stage in which huge pressure generated in its core pushes the atmosphere outwards making it expand and nuclear fusion reaction of heavier nuclei starts. The end stage of Sun would be formation of a white dwarf.

Thus, from the given options, correct answer is B. red giant stage

Answer 2

Answer:

The final stage in the sun's life cycle is the black dwarf stage. The black dwarf stage is proposed to be the final stage in the life cycle of a white dwarf, after it has exhausted its nuclear fuel and undergone gravitational collapse.

The correct option is D.

The life cycle of a star like the sun can be divided into several stages. The specific sequence of stages depends on the mass of the star. However, for a star like the sun, the stages are as follows:

Main Sequence: The sun is currently in the main sequence stage, where hydrogen fusion occurs in its core, producing energy.

Red Giant: As the sun exhausts its hydrogen fuel, it will enter the red giant stage. During this stage, the sun's core contracts while the outer layers expand, causing the sun to become larger and cooler.

Planetary Nebula: In the next stage, the sun will shed its outer layers, forming a glowing shell of gas and dust called a planetary nebula. This process exposes the core of the star.

White Dwarf: After the planetary nebula stage, what remains of the sun's core will collapse inward due to gravitational forces. Black Dwarf: The final stage in the sun's life cycle is the black dwarf stage.

Hence , D is the correct option

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Organisms can be classified in the same species by morphology and

Answers

I believe the correct answer would be variation. The definition of variation in biology means, any differencebetween cells, individual organisms, or groups of organisms of anyspecies caused either by genetic differences or by the effect of environmental factors on the expression of the genetic potentials. So i think that organisms can also be classified as variation. Hope this helped. ♥ ☺

Answer:

The correct answer would be Reproductive Isolation

Explan

Sediment is deposited as a river enters a lake because (A) The velocity of the river decreases
(B) Force of gravity decreases
(C) The volume of water increases
(D) The slope of the river increases

Answers

The answer is number one. When the velocity (the speed) of the river decreases, be it at the entry of a lake, sea, ocean, or meandering, passing through a valley with very little change in altitude, the sediment starts to get deposited. This is due to the decrease in force caused by the decrease in velocity, there is not enough force to push the sediments further so they start to deposit because the river is not able to drag them further on.

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Which of the following is NOT a layer of the Sun?a. convective zone
c. radiative zone
b. core
d. conductive zone

Answers

Answer: Conductive zone.

Explanation:

The Sun is huge and hot ball of gases having enormous energy . It is made up of helium and hydrogen. The sun is made of layers like core, radiative zone, convection zone.

There is no conduction zone and the energy from the sun is convected into the atmosphere and there is no conduction in it. The nuclear fission and fusion inside the sun gives it energy.

I am convinced that the answer is D. Conductive Zone

Which layer of the eye completely surrounds the eye except for a dark, round opening called the pupil?

Answers

The layer of the eye that completely surrounds the eye except for a dark, round opening called the pupil, is the uvea. The uvea is also the pigmented area of the person's eye. So when people that a person has a brown, blue, or green eyes, they are referring to the uvea's color.

Answer: B. cornea

Explanation: i just did this one

When a substance undergoes a phase change, the massincreases

decreases

stays the same

increases or decreases depending on the phase change

Answers

The answer is "stays the same".

Whether what kind of process the substance undergoes, the mass will stay the same. When a substance undergoes a phase change, the weight of the substance would either increases or decreases but the mass will definitely stay the same.

At the end of meiosis II, four daughter cells are produced. true or false