Answer:
1. Option C
2. Option A
Explanation:
1. option C is correct
The protostar glows because of the heat released by the nuclear fusion process in the form of gamma rays. Hence, option C is correct
2. option A is correct
The HII regions consists of the ionized hydrogen atom that causes diffusion of nebula or emission of nebula and coming from a central star with temperature greater than 20,000 K.
1)The heat released by the nuclear fusion process in the form of gamma rays causes the protostar to shine. As a result, option C is appropriate.
2)The HII regions are made up of ionized hydrogen atoms that generate nebula diffusion or emission and are produced by a central star with a temperature more than 20,000 K. As a result, option A is appropriate.
About A protostar and HII region:
A protostar is a nascent star that is still gaining mass from its molecular cloud of origin. The protostellar phase is the first in the stellar development process. It lasts roughly 500,000 years for a low-mass star.HII regions are emission nebulae formed when high-energy UV light from young, massive stars ionizes neighboring gas clouds. They are mostly made up of hydrogen, hence the name (astronomers refer to ionised hydrogen as HII, while neutral hydrogen is referred to as HI). They have temperatures of roughly 10,000 Kelvin.
Thus for both the questions Option C and A are correct.
For more information about the A protostar and HII region refer to the link:
https://brainly.com/question/13940674
Write a paragraph explaining where DNA is located in the cell and what makes up DNA (there are multiple parts)
I’ll give brainiest pls I just need a paragraph about it pls
Equatorial diameter of earth is not identical to polar diameter which one is greater and why
Answer:
The Earth spins on its axis once in 24 hours. Anything that is being spun in a circle, like a stone tied on the end of a piece of string, experiences an apparent force trying to fling it outwards. This is called centrifugal force (or centripetal - I’m not going to get into the argument here that people often have about whether it’s a ‘real’ force or not) and it arises from the fact that a body in motion wishes to continue in a straight line - unless a force acts upon it. In the case of a stone being twirled around on the end of a buit of string, the string transmits the force of the hand that is holding the string and pulls inward on the stone, forcing it to travel in a circle around the person.
Why has some tropical grassland in Africa become desert, like the Sahel?
Answer:The Sahel contains the fertile delta of the Niger, one of Africas longest rivers. Unfortunately, the Sahels fertile land is rapidly becoming desert as a result of drought, deforestation, and intensive agriculture. This process is known as desertification.
Explanation:
Answer: bc of loss of water plus African Humid Periods Paced by Earth's Orbital Changes.
Explanation:
i hope this helps ;) - Mal