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
Certain exposures to radiation can cause cancer. What is the main difference between the use of radiation treatments to treat ca
jonny [76]

the radiations that are used to treat cancers are of the gamma type. primarily emitted from cobalt-60 (a radioactive isotope).  and it is more controlled than other radiation exposures. i.e. solar radiation which is not controlled.

hope that this helps.

4 0
3 years ago
Describe at least three ways that an infectious disease, like smallpox, can significantly impact history.
Alja [10]

Answer:

the discoveries, events and people that continue to affect the history ... The extremely infectious disease was class-blind, killing rich and ... that a few cells remaining in Petri dishes could be used as biological weaponry. ... smallpox, a disease that had now been killing unhindered for at least 2,800 years.

Explanation:

7 0
3 years ago
Read 2 more answers
A scientist studies bacteria that are resistant to
AleksandrR [38]

Answer:

are there other antibiotics that would work n the bacteria,is there a way to reduce the resistance of the bacteria.

Explanation:

because antibiotics are used to kill bacteria and the main reason that they would become resistant over time is because that certain antibiotic was used against the bacteria.

4 0
3 years ago
Read 2 more answers
How can competition be reduced between two species living in the same area?
ycow [4]

Answer:

I believe it is to partition the habitat between the young and the adults.

Explanation:

3 0
3 years ago
No, a child with type B blood would not be the result of two parents with type A blood regardless of the genotypes because with
Alex

Answer:

true

Explanation:

the answer is trueeeeeeeeee

7 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following mechanisms is used by gram-negative bacteria to cross the blood-brain barrier?
    12·1 answer
  • These are the highly reactive elements located in Group 1 of the periodic table. These elements have one electron in their outer
    5·1 answer
  • What neurotransmitter is released from most varicosities in the sympathetic division?
    10·1 answer
  • Drag each tile to the correct location not all the labels will be used identify the phases in the lifecycle of small and big sta
    7·1 answer
  • What reason could exist for varying length of beans
    7·1 answer
  • Neurotransmitters are ________. Group of answer choices chemicals that cross the synaptic gap and bind to receptors on another n
    10·1 answer
  • What is one major difference between viruses and bacteria?
    10·1 answer
  • What is the substance called at the top of the test tube after using<br> this centrifuge machine?
    14·1 answer
  • Match the following terms and definitions.
    6·1 answer
  • The hypothalamus controls the posterior pituitary by way of __________.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!