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
ki77a [65]
3 years ago
6

1.

Biology
1 answer:
MAVERICK [17]3 years ago
4 0

Answer:

1. Purines

2. States that DNA composition varies among species

3. Hydrogen Bond

4. Purines

<em>Answer to #2 is a little iffy </em>-- sorry

Explanation:

Pyrmidines have two rings

Purines have one ring

Complementary bases are connected by hydrogen bonds.

You might be interested in
Cerebrospinal fluid (CSF) is formed by ________ and reabsorbed through arachnoid granulations into ________.
Ede4ka [16]
The correct terms to fill in the blanks are lateral ventricles and venous sinus blood. Cerebrospinal fluid (CSF) is formed by lateral ventricles and reabsorbed through arachnoid granulations into the venous sinus blood. The CSF is a fluid that is clear and colorless found in the spinal cord and in the brain, generally the central nervous system. The CSF functions as a buffer or a shock absorber for the brain. It provides basic mechanical protection for the brain. Also, it helps in the circulation of nutrients and the chemicals that are filtered and aids in the elimination of waste products. 
3 0
3 years ago
Give at least three facts autotrophs and heterotrophs on earth are true?
White raven [17]

Answer:

  • Autotrophs are usually defined as those that can prepare their own food by carrying out the process of photosynthesis, but heterotrophs cannot prepare their own food and are directly dependent on the autotrophs for food. Examples of autotrophs are plants and trees, and examples of heterotrophs are animals and human beings.
  • Autotrophs are the lowest organisms in the trophic level, where they produce the food for the consumers (heterotrophs). On the other hand, the heterotrophs lie above the autotrophs and when they consume their food, they obtain only 10% of the energy, and the remaining energy is released into the environment.
  • Autotrophs can make organic substances by the use of inorganic molecules, but heterotrophs cannot make these substances. They are only dependent on the molecules prepared by these autotrophs.

Thus, these are three of the facts regarding autotrophs and heterotrophs existing on earth that are true.

4 0
3 years ago
Why does our tongue get to stick to ice?
ivanzaharov [21]
Because the pole absorbs the heat quite readily, literally sucking the warmth from your tongue faster than your body can supply it. The saliva on your tongue then freezes (provided it is below freezing), with the resulting ice latching onto the flagpole and your very porous tongue.

Hope that helps you w/ ur question:)
5 0
3 years ago
What do all cells have in common?
Blababa [14]
A would be the answer
6 0
3 years ago
Read 2 more answers
Write 6054 in standard form
gayaneshka [121]
6.054 x 103 Is your answer!!!
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement is most likely to apply to a cell that has DNA within its cytoplasm?
    9·2 answers
  • Predict what would happen if a persons sweat glands didn’t produce sweat
    6·2 answers
  • Please help me i’m confused
    6·1 answer
  • The processes of photosynthesis and carbon fixation are identical in all plants.
    14·2 answers
  • Which natural event can occur either over a few weeks or over a few million years?
    12·1 answer
  • if a somatic cell in a carrot has 18 chromosomes. how many chromosomes would normally be present in a gamete
    13·1 answer
  • 4. During _____ both the contents of the nucleus and the cytoplasm are divided
    12·1 answer
  • Cells that do not contain nuclei are known as
    12·1 answer
  • Which graph below represents the amount of potassium-40 and the amount of argon-40 and calcium-40 over four half-lives?
    12·1 answer
  • For each statement,select the correct type of classification from the drop-down menu classification is based on the similar appe
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!