true of false cytosine is a purine base

Answers

Answer 1
True, cytosine is a purine base.
Answer 2

Answer:

It's True.

Explanation:

i hope this helps.


Related Questions

True or False: The new moon is invisible to Earth because its unilluminated
side is facing Earth.

Answers

True, the new moon is invisible to Earth because it's unilluminated

side is facing the earth

While the illuminated side is facing the sun.

Hope that helps!

Answer:

True; the new moon is invisible to Earth because its unilluminated side is facing Eath.

Explanation:

The new moon, for the most part, does not pass in front of the sun during new moon, but rather passes close to it in our sky. That's why there aren't any solar eclipses in most months. Because the new moon stands between the Earth and the sun, its shadow side faces Earth, rendering it invisible.

energy is radiated by ?

Answers

Answer:

Electromagnet

Electromagnetic radiation is produced by charged particles accelerating through space.

Explanation:

Hope it helps

explain and account for the difference in oxygen concentration that would be found on either side of the double membrane

Answers

Answer:

A concentration gradient will be developed.

Explanation:

1. When the oxygen concentration is more outside a cell, then by the process of diffusion the oxygen will pass into the cell.

2. Diffusion can be described as a process in which molecules move from a higher concentration to a lower concentration i.e. along a concentration gradient. Hence, this process does not require energy.

3. When the oxygen concentration will be more in a cell then again through diffusion the oxygen will move out of the cell.

can viruses save lives

Answers

Answer:

Some of the viruses infecting humans are indeed capable of causing severe and often lethal diseases, but other viruses can be manipulated to be beneficial to human health. These viruses offer the potential to cure cancer, correct genetic disorders, or fight pathogenic viral infections.

Explanation:

Blood type in humans is determined by multiple alleles. A cross between two individuals is shown in the Punnett square below. What must the phenotype of the parents be to produce the results shown?

Answers

Answer:

top of square would be AB

left of square would be AO

1 points
One of the functions of the trachea is to filter the air we breathe before it reaches the lungs and remove any captured particles from the
airway. Name the tissue type shown below, which is found along the surface of the trachea.
Simple cuboidal
Stratified columnar
Stratified cuboidal
Simple squamous
Pseudostratified colurnar

Answers

Answer:

Pseudostratified columnar epithelium

How is the sun a special star?

Answers

Answer: "How is the sun a special star?"

Explanation: The sun is our largest energy source, It heats our planet and gives us seasons, It helps plants grow.

Which nutrient helps to regulate body temperature?
a. Carbohydrates
b. Minerals
c. Proteins
d. Water

Answers

Answer:

The answer is D

Explanation:

Did some quick research :)

Answer: water ``````````````````````````````````````````````

Who was the first to make accurate observations without a telescope of our solar system?

Answers

Answer : Tycho Brahe

Where does petroleum come from? O A. Bauxite reserves O B. Ancient sea creatures OC. Ancient plants O D. Dinosaur remains​

Answers

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

The Correct choice is B. Ancient see creatures

Petroleum is a finished product formed by the fractional distillation of Crude oil that is found in coastal / Seaside areas. because it's basically formed by Ancient see creatures.

Describe the similarities you observe between the major stages in the life cycles of flowering plants and non-flowering, seed-bearing plants.

Answers

Answer:

Seeds are found in both flowering and non-flowering plants. Both plants reproduce, the difference being that the former reproduces through blossoms, whereas the latter reproduces through seeds or spores. Because both flowering and non-flowering plants have chlorophyll, they can both photosynthesise.

Explanation:

Derive observation from above picture​

Answers

Answer:

what picture. attach it.

5 types of phagocytes

Answers

Answer:

The professional phagocytes are the monocytes, macrophages, neutrophils, tissue dendritic cells and mast cells.

Think of a behavior that you have that you would like to change. How could you use behavior modification, specifically positive reinforcement, to change your behavior? What is your positive reinforcer?

Answers

Thus, positive reinforcement occurs when a behavior is encouraged by rewards. If a child enjoys candy and cleaning the room is the desired behavior, the candy is a positive reinforcer (reward) because it is something that is given or added when the behavior occurs. This makes the behavior more likely to recur.

Which type of protein will fight disease

Answers

Explanation:

I hope this may help you

writting only because answer need 20 words

With which pair would you see the biggest differences in the microbiota: your cheek
versus your palm, your cheek versus your friend’s cheek, your cheek today versus your cheek 3 months from now?
Why?

Answers

The biggest difference in the microbiota can be seen in : ( B ) your cheek versus your friend’s cheek.

What is Microbiota

Microbiota is the microorganisms present in specific region or area and It protects the region from harmful indigenous microorganisms as well. The microbiota specie that is present in an individual varies greatly from the microbiota species present in a different individual.

Therefore the Microbiota species present in your cheek will vary greatly from the microbiota species present in your friend's cheek.

Hence we can conclude that The biggest difference in the microbiota can be seen in  your cheek versus your friend’s cheek.

Learn more about Microbiota : https://brainly.com/question/9870114

Help

I think it’s D. But I’m not sure.

Why is malaria so common in Africa South of the Sahara?


A) The principal malaria transmitting mosquito - Anopheles - is common there.

B) Lack of resources and political instability prevent the building of adequate prevention programs.


C) Malaria parasites are increasingly resistant to antimalarial drugs.

D) All of the above.

Answers

Answer:

I also have a feeling that it is D,all of the above. Try it

A small population of native red birds lived in a habitat that did not undergo changes for a long period of time. The birds were geographically isolated from other red birds. Predict the effects of natural selection on this population of birds.

The red birds would develop traits that would help them to be better suited.
The population of the isolated red birds would have less genetic variation than the parent population.
This population of red birds would continue to have a similar genetic makeup to the native population.
Only specific alleles of traits would increase in the red birds.

Answers

Answer:

The population of the isolated red birds would have less genetic variation than the parent population.

Explanation:

i took the test

Answer:

The population of the isolated red birds would have less genetic variation than the parent population.

Explanation:

Hope this helps :)

which solution has the lowest concentration of h positive ions

Answers

A solution of (d) pure water will have the lowest concentration of hydrogen ions.

Diseases such as colds or influenza are caused by a

bacterium
parasite
fungus
virus

Answers


Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful. But under certain conditions, some organisms may cause disease.

I hope this helps! :)
Diseases such as colds or influenza are caused by a virus

write a sentence or draw a diagram to relate these words: cell, tissue, organ

Answers

A cell is the basic unit of life
A tissue is a group of cells that come together to perform a given function
An organ is a group of similar tissues that come together to perform a particular function

How does climate change affect ecosystems and the life in them. Give examples

Answers

Answer:

Climate change can alter where species live, how they interact, and the timing of biological events, which could basically transform current ecosystems and food webs. Climate change can overwhelm the capacity of ecosystems to mitigate extreme events and disturbance, such as wildfires, floods, and drought. HOPE THIS HELPS :D

Explanation:

Select the correct answer. What is the approximate solution to this equation? 19+ 2lnx = 25 A. 3 B.0.05 C. 20.09 D. 1.93 ​

Answers

Answer:

C. 20.09  ​

Explanation:

!!!!! Which of the following statements best describes the climate of an area rather than its weather conditions?
A) The summers are hot and humid
B) The temperature at noon was 86 F
C) Total rainfall on April 9 was 2 inches.
D) Strong wind are expected tomorrow evening.

Answers

D)Strong wind are expected tomorrow evening.

The materials of the crust have less mass than materials deeper in the earth.

True
False

Answers

Answer:

True

Explanation:

The crust makes up less than 1% of earths mass.

Lewis is exercising and his muscles need oxygen. Which best describes how systems interact to bring his body into homeostasis? The circulatory system brings oxygen to the respiratory system, which delivers oxygen to the muscular system. The respiratory system brings oxygen to the circulatory system, which delivers oxygen to the muscular system. The respiratory system brings oxygen to the circulatory system, which delivers oxygen to the skeletal system. The circulatory system brings oxygen to the respiratory system, which delivers oxygen to the skeletal system.

Answers

The answer to your question is B) The respiratory system brings oxygen to the circulatory system, which delivers oxygen to the muscular system. Have a great day

The respiratory system brings oxygen to the circulatory system, which delivers oxygen to the muscular system. Therefore, option (B) is correct.

What is respiratory system?

The respiratory system is the biological system that facilitates the exchange of gases between an organism and its environment. It is responsible for the intake of oxygen, which is used for cellular respiration and energy production, and the removal of carbon dioxide, which is a waste product of cellular metabolism. The respiratory system includes the lungs, airways, and other structures involved in breathing.

The respiratory system is responsible for bringing oxygen into the body and removing carbon dioxide, while the circulatory system transports oxygen-rich blood from the lungs to the muscles, where it is needed for energy production. The muscular system then uses the oxygen to produce energy and power movement. These systems work together to ensure that Lewis's body is able to maintain a state of balance, or homeostasis, during exercise.

Learn more about respiratory system, here:

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#SPJ7

You are visiting Walt Disney World in July. You are extremely overheated. You are passionately driven to find a chilly, air-conditioned environment, and you won’t stop looking until you find it! The principle at work in this scenario is ____________________.

Answers

The principle at work in this scenario is referred to as Determination.

What is Determination?

This can be defined as a positive emotional feeling which involves persevering towards a difficult goal despite obstacles encountered.

The individual was subjected to the extreme heat but was still very much determined to find a chilly, air-conditioned environment which makes it the most appropriate choice.

Read more about Determination here https://brainly.com/question/679318

Which of the following pieces of evidence would be considered the most reliable and valid? (1 point)

Odata collected from a controlled experiment that has been reproduced in several different labs

O data collected from a thousand individuals that cannot be reproduced under different circumstances

O data from a single observation of an event that has not been witnessed again

o data reported by a world-renowned expert that cannot be reproduced in a different lab

Answers

A piece of evidence that would be considered the most reliable and valid will be data collected from a controlled experiment that has been reproduced in several different labs.

Reliability of results

In scientific research, the reliability of results is improved if the result is reproducible by independent researchers under similar conditions.

Results that are not reproducible are not reliable and may not be accepted as evidence to support hypotheses or theories in science.

Thus, irrespective of who collected the data, reproducibility is a key attribute of reliable and valid data.

More on reliability of results can be found here:  https://brainly.com/question/1873979

ОО.0 О.
What is the name of the epithelial tissue that lines the roof of the nasal cavity?
Olfactory epithelium
Gustatory epithelium
Gustatory dermis
Olfactory dermis

Answers

The olfactory epithelium is a specialized epithelial tissue inside the nasal cavity that is involved in smell. In humans, it lies on the roof of the nasal cavity about 7 cm above and behind the nostrils.

Ben wants to be on the basketball team, but he's worried he won't make it to the team. He spent weeks working out as hard as possible, preparing for try outs. At try outs, he amazes the coaches with his skills as good player. They ask him to be their starting player that year and give him a jersey. Ben leaves the court happily!

II. Match the events in column A with the correct element of a plot in column B.

COLUMN A

14. He spends weeks working out as hard as possible, preparing for try outs.

15. Ben wants to be on the basketball team but he's worried he won't make the team.

16. At try out, he amazes the coaches with his skill as a player

17. Ben was given a jersey.

18. Ben leaves the court happily!

COLUMN B:
A. Exposition
B. Rising Action
C. Climax
D. Falling Action
E. Resolution


PLEASE ANSWER IT I REALLY NEED THE ANSWER

NONSENSE REPORT​

Answers

Answer is A
He is exposing himself to trials and failure also success
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