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
monitta
3 years ago
13

The respiratory zone is the site of gas exchanges and includes any structure in which are found

Biology
1 answer:
madreJ [45]3 years ago
6 0
In the digestive system
You might be interested in
What is the difference between HLA and MHC?
mr_godi [17]
The major histocompatibility complex (MHC<span>) is a set of cell surface proteins essential for the acquired immune system to recognize foreign molecules in vertebrates, which in turn determines histocompatibility. ... The human </span>MHC<span> is also called the </span>HLA<span> (human leukocyte antigen) complex (often just the </span>HLA<span>).</span>
5 0
3 years ago
I dii ok not under stand this please help me!
satela [25.4K]

Answer:Answer:

For 1: The correct answer is Model 1, 2, and 4.

For 2: The correct answer is Option 1.

Explanation:

For 1:

An element has 3 subatomic particles: electrons (E), neutrons (N) and protons (P).

Atomic number is defined as the number of protons or number of electrons.

Atoms having same number of protons are same. From the given models, Model 1, 2 and 4 have 2 protons with different neutrons. Hence, these models belong to same element.

For 2:

A compound is defined as a substance in which two or more types of elements combine in a fixed ratio. For Example:  is a compound made out of atoms of carbon and oxygen.

Hence, the correct answer is Option 2.

7 0
3 years ago
the chemicals in cigarette smokers are known to cause cancer propose a series of steps that could lead to the development of lun
Aleks [24]

Answer:

Cell deterioration

Explanation:

Once the cells first come in contact, they immediately create a cell shield that is composed of weaker cells, while the rest continue their work, the problem with this, is that their is a lack of cells to do work and the weaker cells are slowly dying and creating holes for the harmful chemicals to enter, as the cells deteriorate they clot together and create a lump in a final attempt, and it ends up creating deadly weight in the lungs.

4 0
3 years ago
Some bacteria are facultative anaerobes, which usually produce ATP by aerobic respiration but are also capable of switching to f
OverLord2011 [107]
<h2>Some bacteria are facultative anaerobes, which usually produce ATP by aerobic respiration but are also capable of switching to fermentation when there is a lack of _____OXYGEN____ in their environment. </h2>
7 0
3 years ago
Why are protists considered the precursors to the eukaryotic diversity of life on the planet today
liubo4ka [24]

The protists belong to the kingdom Protista that comes under the domain Eukarya. Protists are a very broad group, comprising of various eukaryotes that do not fit into the other kingdoms, like animals, plants, and fungi. The protists were the initial eukaryotes.  

They would go on to become the precursors for each of the other eukaryotic kingdoms. By examining protists one can witness the transformation between the single-cell prokaryotes and modern multicellular eukaryotes.  


4 0
3 years ago
Other questions:
  • What is a hypothesis?
    13·1 answer
  • Throughout the year, areas of the Earth's surface are either tilted away from the Sun or toward the Sun. This is a result of the
    11·2 answers
  • A population of sea life was very successful in us marine environment and suddenly the seal life experienced a rapid decrease in
    8·1 answer
  • What are some careers in biology
    13·1 answer
  • HELPPPP PLEASE THE THING IS 53 POINTS
    5·2 answers
  • In a chemical reaction, the chemicals you start with (those in the rectangle) are called ____________________. The ones you end
    12·1 answer
  • Fungi include which living organisms?
    11·1 answer
  • DNA replication occurs during which phase of the eukaryotic cell cycle?
    8·1 answer
  • What are the four ways that RNA differs from DNA?
    13·2 answers
  • What microscope magnifies up to 100,000x
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!