All categories

3 years ago

Which of the following are the oldest remnants from the formation of the

Biology

1 answer:

natka813 [3]3 years ago

5 0

White dwarf

Option 3.

<u>Explanation:</u>

White dwarf are very old in existence in the world. The white dwarfs are at least about twelve to thirteen billions years old in existence. These are only slightly younger than the universe itself.

Thus these white dwarfs provide a clear idea about how old the universe is and since when it has come into existence itself. Although not exact but some what idea can be made that it is about more than thirteen billion years old and came into existence back then.

You might be interested in

The gradual change in plants communities of a sand dune ecosystem can be classified as

natita [175]

The types of species in a community gradually change and are replaced through a process known as ecological succession.

<h3>Ecological succession </h3>

The process by which a region's species and habitat mix needs to evolve over time is called ecological succession. These communities gradually replace one another until a "climax community" is reached, such as a mature forest, or until a disturbance, such as a fire, happens. A key idea in ecology seems to be ecological succession.

On the island, ecological succession has produced topsoil that can support ecosystems. As shrub/grassland areas change into forested areas during ecological succession, there are different types of habitat fragmentation.

To know more about ecosystems :

brainly.com/question/13979184

#SPJ10

8 0

1 year ago

What structure keeps food from entering the larynx during swallowing?

Anika [276]

The swallowing mechanism consists of three stages, beginning with the oral phase that begins in the mouth. The second stage, called the pharyngeal phase, triggers the swallowing reflex that moves food through the throat, or pharynx. During the pharyngeal phase, the larynx closes and breathing stops while food begins to move through the throat to the esophagus. The closing of the larynx is accomplished by the epiglottis. During the third stage, food is moved down the esophagus to the stomach.

7 0

3 years ago

The grants witnessed strong selection during droughts in 1977 and 1985. compare the two droughts.select all that apply.select al

olga2289 [7]

Both droughts resulted in strong natural selection on medium ground finch populations and both droughts resulted in alteration to available food, which favored the survival of some medium ground finches over others. Thus, the correct option is A and B.

<h3>What is natural selection?</h3>

Natural selection is a natural process in which organisms that are more adapted to their environment survive and reproduce more than those that are not.

Darwin's Finches' beaks were picked for their beneficial adaptations over generations until they all branched off to become new species. These birds have distinct beaks than mainland finches, although being almost identical in every other way.

For more information regarding natural selection, visit:

brainly.com/question/1596717

#SPJ1

4 0

2 years ago

Name two ways forelimbs are different from limbs

77julia77 [94]

1. The hind limbs tend to be sturdier and stronger
2. Hind limbs are more firmly attached to the spine

7 0

3 years ago

Noble gases have a full outer energy level and are in active these Atoms are considered

777dan777 [17]

Explanation:

Noble gases have a full outer energy level and are inactive. These atoms are considered inert.

Hope this helps

Good Luck

7 0

4 years ago