1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
choli [55]
3 years ago
5

How is modern earth different from earth over four billion years ago

Biology
2 answers:
Viefleur [7K]3 years ago
5 0

Answer:

Earth was not habitable four billion years ago but now it is the only known planet that supports life.

Explanation:

Four billion years old earth was made up of dust and gases. It is claimed by scientists that the sources from which earth was formed included  – a) Lunar rocks, b) Meteorites and c) Zircon crystal. The temperature of earth at that time was extremely high such that all the metals with in it were in molten state. Also there was no oxygen in the atmosphere. All these conditions made earth a non habitable planet.  

But the present earth is a habitable planet with life on it that is dependent on its resources like air and water. Also the temperature of earth is much supportive to the existence of life on it.  

lesya692 [45]3 years ago
3 0
Continents has shifted millions and million years ago
You might be interested in
Your respiratory system is the system in your body that is responsible for breathing True or False
DanielleElmas [232]
Certainly true. respiratory system responsible for breathing.....
8 0
3 years ago
Inside cells, special molecules carry messages from the membrane to the nucleus. Which body system uses a similar process?
rjkz [21]

Answer:

Endocrine system

Explanation:

7 0
3 years ago
Read 2 more answers
Atoms in triglycerides could be used in the synthesis of dna. which metabolic intermediate and pathway will function as crossove
andre [41]

Atoms in triglycerides could be used in the synthesis of DNA. Acetyl-CoA is the metabolic intermediate involved in Citric acid cycle pathway which functions as crossover points between triglycerides and DNA.

The Citric acid cycle also known as Krebs cycle or TCA cycle (tricarboxylic acid cycle) involves a series of enzyme-catalyzed reactions which occur in the mitochondrial matrix. In this pathway, acetyl-CoA is oxidized to form carbon dioxide and the coenzymes are reduced, which generate ATP in the electron transport chain.

Acetyl-CoA (acetyl coenzyme A) takes part in many biochemical reactions linked with protein, carbohydrate and lipid metabolism. Its main role is to deliver the acetyl group to the Citric acid cycle (Krebs cycle) to be oxidized for energy production.

To learn more about Acetyl-CoA here

brainly.com/question/14174563

#SPJ4

8 0
2 years ago
Explain the benefit of an increase in capillary-action to a hockey player.
Nesterboy [21]

Answer:

Explanation:

high muscle capillary density means a large muscle-to-blood exchange surface area, short oxygen diffusion distance, and high red blood cell mean transit time.Capillary action is important for moving water (and all of the things that are dissolved in it) around. It is defined as the movement of water within the spaces of a porous material due to the forces of adhesion, cohesion, and surface tension.

7 0
3 years ago
What is the main reason we need protein in our diets
CaHeK987 [17]

Answer:

Every cell in the human body contains protein. The basic structure of protein is a chain of amino acids. You need protein in your diet to help your body repair cells and make new ones. Protein is also important for growth and development in children, teens, and pregnant women

Explanation:

5 0
3 years ago
Other questions:
  • The nurse is caring for a patient with hyperthyroidism. what is the nurse likely to observe in the patient? fatigue chest pain s
    15·1 answer
  • What is the relationship between the oxygen cycle and the carbon cycle?
    8·2 answers
  • Land and surface water absorb solar energy, then emit _____, which fuels evaporation. Increased evaporation causes air near the
    6·1 answer
  • Watson and Crick discovered that DNA is __________. A. the genetic information B. very small C. a double helix D. a treatment fo
    9·2 answers
  • The building block of living things is called
    13·2 answers
  • The second male cone in cycas plant is formed by the activity of​
    14·1 answer
  • Select all the kingdoms below that consist of prokaryotes:
    11·2 answers
  • The flow of information in a cell is
    6·1 answer
  • The trait for sickle cell anemia in humans shows a recessive pattern of inheritance. The alleles for sickle cell anemia in two i
    7·2 answers
  • What is the structure inside of the nucleus called and the name of the phase of the
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!