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
Lesechka [4]
3 years ago
8

What nitrogenous base is double ringed

Biology
1 answer:
Lorico [155]3 years ago
6 0
Purines; like adenine and guanine.
You might be interested in
Definition of congenital disease
Helen [10]

Answer:

the diseases that come at the time when they born are called congenital disease

Explanation:

mainly occur to babies

6 0
3 years ago
A population ecologist determines the number of oak trees per square unit in a forest. What is he trying to infer by doing so?.
morpeh [17]

The answer is letter C. The distribution of oak trees in an area.

Population Ecologist would often measure the number distribution and density of the area. Trees are often measured by plots or by hectares. This is to know how many trees are situated in that area.

4 0
3 years ago
Why do many diseases such as measles occur only once in a person yet others such as colds occur more than once?
mezya [45]

Answer:

This happens because of our immune system. Our immune system keep record of every attacking microbe. It contains two type of while blood cells firstly is T cell that respond quickly to the attacking microbe. While secondly B cells that recognize those specific cells and fights them off. In addition to that B cells clones itself as memory cells for that disease and will remains in your body for years

3 0
3 years ago
Data shows that the average temperature in the United States has increased over over the last 50 years. Which of these statement
harkovskaia [24]

B i hope it help you

8 0
3 years ago
Dr.Mendez specializes in patients who have osteoarthritis. His patients often complain of pain and swelling loss of cartilage. W
AlekseyPX

Answer: skeletal system

Explanation: osteoarthritis affects the cartilages of Bones.cartilages is a flexible connective tissue ,in a joint that covers the surface of the bones in the joint.it also cushions the bones from impact.

During osteoarthritis,the cartilages wears out and causes the bones in the joint to rub against each other causing swollen joints, painful joints and stiffness of joints

It occurs in joints of the knees,hips,fingers and toes.

8 0
3 years ago
Other questions:
  • State one possible reason why a gene for the production of a human hormones would be placed in bacterial DNA
    12·1 answer
  • What is the term for classifying and grouping organisms?
    15·2 answers
  • Why are functional MRIs useful to doctors?
    15·2 answers
  • What must scientists look for in their experiment or their data to make sure it is accurate? A. Sources of error B. Observations
    8·1 answer
  • Which kind of electrical charge is found on a hydrogen atom of a polar water molecule
    6·1 answer
  • Please help . - How do scientist explain the incomplete fossil record? A) The fossil record is limited to fossilized animals and
    13·1 answer
  • Compare and contrast the body's physiological responses to aerobic training and anaerobic training. What adaptations must the bo
    12·1 answer
  • All of the following affect the temperature at which magma forms except what?
    7·1 answer
  • There are more than 600 muscles in the human body. Your heart is a muscle. Muscles make you breathe and muscles hold you upright
    11·2 answers
  • Por es necesaria la duplaciacion del material genetico en la mitosis
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!