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
bazaltina [42]
3 years ago
14

A. What gases were present in Earth's early atmosphere?

Biology
1 answer:
frutty [35]3 years ago
5 0

Answer:

The early atmosphere was probably mostly carbon dioxide, with little or no oxygen. There were smaller proportions of water vapour, ammonia and methane. As the Earth cooled down, most of the water vapour condensed and formed the oceans.

Explanation:

You might be interested in
Suppose u saw a small organism move across your book would u conclude that this organism was unicellular or multicellular ?
julsineya [31]

Answer:

multicellular; single celled organisms are often too tiny to be seen without a microscope

5 0
3 years ago
Read 2 more answers
"what is total volume of the gas-exchanging region of the lungs?"
MrMuchimi
The total volume of the gas-exchanging region in the lung is called alveolar volume.

The alveolus is an air sack-like organ in the end of the respiratory airway. The alveolus is the site where gas-exchanging happens, so only air inside alveolus that will undergo actual exchange. Air in bronchus or trachea wouldn't do exchange
3 0
3 years ago
A cell that contains chloroplasts, a nucleus, and mitochondria is discovered. Biologists might decide it could
Tom [10]

Answer:

eukaryotic cell

Explanation:

because prokaryotic cells lack nucleus

5 0
2 years ago
Read 2 more answers
When scientists analyzed drilling samples from the Glomar Challenger study, which discovery did they make about rocks in relatio
Nat2105 [25]

Answer:

When scientists studied patterns in the rocks of the ocean floor, they found more ... Making Models What characteristic of the ocean floor did you observe as you swept ... recorded the magnetic memory of rocks on both sides of a mid-ocean ridge. ... The Glomar Challenger, a drilling ship built in 1968, gathered the samples.

Explanation:

Glomar Challenger: Drillship of the Deep Sea Drilling Project. It was on June 24, 1966, that the Prime Contract between the ... One of the most important discoveries was made during Leg 3. ... After analysis of samples, scientists concluded that the ocean floor is probably no older than 200 million years.

4 0
4 years ago
The _____ region is the most common area for pressure ulcers to develop.
aleksley [76]
The buttock region is the most common area for pressure ulcers to develop. Pressure ulcers or bedsores are injuries to skin and the underlying tissue resulting from prolonged pressure on the skin, They most often develop on the skin which covers bony areas of the body, such as hips, tailbone and the heals. 
8 0
3 years ago
Other questions:
  • What is the difference between an endothermic and an ectotherm
    10·2 answers
  • What is the purpose of the umbilical cord
    12·1 answer
  • A homozygous dominant brown mouse is crossed with a heterozygous brown mouse (Tan is the recessive color). What are the genotypi
    10·1 answer
  • In the water cycle shown above, the two processes that involve water entering the atmosphere are: a. Evaporation and transpirati
    6·1 answer
  • The ocean’s surface temperature varies with latitude and a. longitude. c. time of year. b. salinity. d. moon phases. Please sele
    9·2 answers
  • Bacterial enzymes that cut DNA are also called restrictive exonucleotides. True or False?
    5·2 answers
  • One word that sums up the first law is: <br> Motion<br> Force<br> Acceleration<br> Intertia
    10·1 answer
  • Which of the following is a type of asexual reproduction?
    14·1 answer
  • In at least 200 words explain how DNA replicates
    13·2 answers
  • HELP PLEASE ASAP-----<br><br> -<br> --<br> ---
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!