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
UkoKoshka [18]
3 years ago
11

Which of the following is considered a xanthine?

Biology
1 answer:
telo118 [61]3 years ago
7 0
The answer is C. theophylline. Xanthine is a kind of purine base found in many human body tissues and fluids and in other organisms. Theophylline is a kind of methylated xanthine.
You might be interested in
use the words and concepts of evaporation and condensation as well as a form of each of these words explain what happens when it
liubo4ka [24]
Portland, Oregon, is a city right next to northern west coast of the USA. Besides being very close to the sea, it is also laid on a river. The sun that heats up the ocean and the river leads to evaporation, causing water vapour to ascend, because of a few wind currents, this water vapour is taken to Portland's area where it colds down and condensates, raining over Portland.
6 0
3 years ago
The primary purpose of the basic economic order quantity model is
AleksAgata [21]

Answer:

D. to minimize the sum of setup cost and holding cost e. to calculate the optimum safety stock

Explanation:

Economic order quantity ( EOQ ) is formulated as :

EOQ= \sqrt[]{\frac{2C_O D}{C_h} }

Co = Ordering cost

D = annual demand

Ch = Annual unit holding cost

Economic quantity is the order quantity which minimizes sum of annual cost of ordering and annual inventory holding cost  so to minimize the overall cost of the inventory.

ANSWER : d) to minimize the sum of setup cost and holding cost that is to calculate the optimum safety stock.

6 0
3 years ago
What once was an open pasture on a long abandoned farm has changed over time, without the direct influence of humans. after the
Komok [63]

The mentioned case represents secondary succession.  

Secondary succession is one of the two kinds of ecological succession of plant life. Secondary succession refers to a procedure initiated by an incident, like harvesting, forest fire, hurricane, and others, which minimizes an already settled ecosystem to a lesser population of species.  

Thus, it can be said that the secondary succession takes place in preexisting soil on the other hand primary succession takes place in a place devoid of soil.  

Secondary succession is the ecological succession, which takes place after the initial succession has been disrupted and certain plant and animal species do prevail. It is usually faster in comparison to primary succession.  


8 0
3 years ago
How do people know when they have been bitten by the vector that causes African
IceJOKER [234]

Answer:

Explanation:

African trypanosomiasis is a parasitic disease transmitted by the tsetse fly. It gets its nickname 'sleeping sickness' because symptoms can include a disturbed sleep pattern.

5 0
2 years ago
How does the structure of the cell membrane support its function?
mylen [45]

Answer:

Phospholipids form the basic structure of a cell membrane, called the lipid bilayer. Scattered in the lipid bilayer are cholesterol molecules, which help to keep the membrane fluid consistent. Membrane proteins are important for transporting substances across the cell membrane

7 0
2 years ago
Other questions:
  • The first several weeks after birth are a critical period because most major organs are forming.
    8·1 answer
  • Enzymes work by _____.
    15·2 answers
  • The process through which humans breed other animals and plants for particular traits:
    6·1 answer
  • What are four different properties of magnets
    7·2 answers
  • How many chromatids are found in this nucleus?
    13·1 answer
  • Which of the following processes converts glucose molecules to carbon dioxide molecules?
    12·1 answer
  • Replanting trees on a bare hillside is an EXAMPLE of
    9·2 answers
  • (WILL GIVE BRAINLY)
    13·1 answer
  • How do biologists describe the order of the stages of the<br> cell cycle?
    7·1 answer
  • A Punnett square is used to determine the __________. A. Probable outcome of a genetic cross B. Different forms of a gene C. Res
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!