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3 years ago

What are your thoughts about how the universe formed?

2 answers:

7 0

I think it varies. the big bang theory seems to be a widely accepted theory about how the universe began. but then again, how did the little things that the universe originated from come into existence?
anyways, the big bang theory hasn't been proven... so it's up for discovery i guess

V125BC [204]3 years ago

3 0

For centuries scientists thought the Universe always existed in a largely unchanged form, run like clockwork thanks to the laws of physics. But a Belgian priest and scientist called George Lemaitre put forward another idea. In 1927, he proposed that the Universe began as a large, pregnant and primeval atom, exploding and sending out the smaller atoms that we see today.

His idea went largely unnoticed. But in 1929 astronomer Edwin Hubble discovered that the Universe isn’t static but is in fact expanding. If so, some scientists reasoned that if you rewound the Universe's life then at some point it should have existed as a tiny, dense point. Critics dismissed this: the celebrated astronomer Fred Hoyle sarcastically called this concept the “Big Bang Theory"

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How does photosynthesis relate to the formation of dna?

Harlamova29_29 [7]

Answer:

During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.

Explanation: hope this helps

3 0

3 years ago

Read 2 more answers

Antibodies are composed of two types of peptides, heavy chains and light chains. One of the major classes of antibody molecules

timurjin [86]

Answer and Explanation:

a. form the antigen-binding site ⇒ both chains

The antigen-binding site is formed by one hypervariable region of the light chain (VL) and one hypervariable region of the heavy chain (VH). So, both type of chains contributes to antigen recognition.

b. contain multiple variable domains ⇒ none

Both chains - light and heavy - contain <u>only one</u> variable domain (VL and VH).

c. are found in the Fab fragment ⇒ both chains

The Fab fragment is composed of portions of both light and heavy chains: each portion contains one variable domain and one constant domain. The Fab fragment binds specifically the antigen.

d. are found in the FC fragment ⇒ heavy chains

The Fc region is composed of portions of heavy chains (CH² and CH³), so it contains constant domains.

e. contain only one constant domain ⇒ light chains

Each light chain contains one variable domain (VL) and one constant domain (CL).

f. contain multiple constant domains ⇒ heavy chains

Each heavy chain contains three constant domains: CH¹, CH² and CH³.

g. contain only one variable domain ⇒ both chains

Both light and heavy chains contain one variable domain. The difference is given by the number of constant domains: light chains have 1 constant domain while heavy chains have 3 constant domains.

8 0

3 years ago

How many poles does Jupiter’s magnetosphere have? a. 2 c. 8 b. 4 d. 9

serious [3.7K]

Answer:

A. 2

Explanation:

I was wrong the first time, I wasn't thinking of jupiter for some reason. sorry!

6 0

3 years ago

Read 2 more answers

If the chemical enzyme pepsin was mixed with some proteins in a test tube in a laboratory, which of these outcomes would you pre

seropon [69]

Pepsin is one of three principal protein-degrading enzymes in the digestive system, the other two being chymotrypsin and trypsin. During the process of digestion, these enzymes collaborate to break down dietary proteins to their components, i.e., peptides and amino acids.

4 0

3 years ago

Read 2 more answers

Which of the following denotes the divisions of the geologic time scale in correct order of decreasing lengths of time beginning

Stels [109]

Answer:

d. eon, era, period, epoch

Explanation:

The geological time scale has been made so that the scientists can have a practical system about the classification of geological time, thus everything that has happened throughout it. The geological time unites have been defined in accordance with important events that have happened, thus marking their end or beginning. These events can be mass extinctions, catastrophes, climate patterns, domination of certain species etc. The longest of these time units is the eon, lasting for more than half a billion years, and up to 2 billion years. The era comes as the second longest time unit, lasting for several hundred million years. The period lasts for several tens of million years, and the epoch is the smallest unit, lasting for few million years, or several hundred thousand years.

3 0

3 years ago