Which nitrogenous bases are considered purines?

Answers

Answer 1

adenine

cytosine

consider purines


Related Questions

Which of the following has the least resistance? *
Long narrow metal wire
A short thick metal wire
Wood
Plastic

Answers

Answer:

a short thick metal wire

Explanation:

i hope this helps:)

According to the article, there are 3,000 brown tree snakes in Guam per square mile (mi2). The average high school in the United States is approximately 121,000 square feet or 0.004 square miles. According to these numbers, how many brown tree snakes would be found in an area the size of a typical U.S. high school?​

Answers

Answer:

12 snakes

Explanation:

Given

[tex]3000\ snakes = 1\ mi^2[/tex]

Required

Determine  the number of snakes in 0.004mi²

Represent this with x;

So, we have:

[tex]3000\ snakes = 1\ mi^2[/tex]

[tex]x = 0.004\ mi^2[/tex]

Cross Multiply

[tex]x * 1\ mi^2 = 3000\ snakes * 0.004mi^2[/tex]

[tex]x * 1 = 3000\ snakes * 0.004[/tex]

[tex]x = 3000\ snakes * 0.004[/tex]

[tex]x = 12\ snakes[/tex]

WILL MARK BRAINLIEST!!!

how can a correlation measure aid the process of predictions

Answers

Prediction: Correlations can be used to help make predictions. If two variables have been known in the past to correlate, then we can assume they will continue to correlate in the future. We can use the value of one variable that is known now to predict the value that the other variable will take on in the future.

A positive correlation is one in which variables go up or down together, producing an uphill slope. ... Any type of correlation can be used to make a prediction. However, a correlation does not tell us about the underlying cause of a relationship.

Hope it helps!

Horned toads squirt blood from their eyes as a
A.means of evading predators
b. means of catching prey
c. mating behavior
d. territorial marker

Answers

Answer:

a means of avoiding predators

Explanation:

as a person that owns them they use the blood to scare bigger predators

Which of the following describes a state of equilibrium?

Answers

Answer: My best guess would be B but i might be wrong that sounds most right to me. :)

Explanation:

Question 3

Which statement below is correct?
A. Photosynthesis produces ATP, and cellular respiration requires light
energy
B. Photosynthesis produces carbon dioxide, and cellular respiration
produces sugars.
C. Photosynthesis and cellular respiration occur in both plant and
animal cells.
D. Photosynthesis produces the oxygen required for cellular respiration.

Answers

Answer:

B is the correct answer.

A is incorrect because respiration is always occuring in animals and plants, therefore it means it does not require the presence of light. Photosynthesis does produce ATP, though.

Not C because photosynthesis does not occur in animals

Not D because they both are  different processes. They don't really depend on each other, though they could occur at the same time.

Which statement describes surface features called maria on the moon?



A. High lands and mountainous areas

B. Layers of dust and rock

C. Deep areas of cooled lava


D. Deep, rocky and barren valleys

Answers

Answer:

B is the right answer I think.

The statement describes surface features called maria on the moon as the deep areas of cooled lava. Option C is correct.  

In reality, maria are vast basins that contain lava flows marked by crater formations, ridges, and faults, as well as straight and winding valleys known as rilles, and are completely dry.

There are roughly 20 major regions of this type, with most of them (including the largest) located on the face of the Moon that is always facing the Earth.

During this time, the moon experienced large-scale collisions with asteroids that cracked the surface of the Moon, resulting in large craters.

Liquid magma beneath the Moon’s surface flowed through the cracks, filling the craters and cooling them. These craters are what we refer to as lunar maria.

Therefore option C is correct.

To learn more about maria, refer to the link:

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Which of these is an abiotic infectious agent? (science)

Bacteria
Fungi
Parasites
Viruses

Answers

Answer:

Bateria

Explanation:

In humans, the flu virus and streptococcal bacteria cause infectious diseases, and they spread from person to person. In contrast, non-infectious (abiotic) disorders in humans include health conditions which are not transmitted from person to person or caused by an infectious agent

Answer:

BACTERIA

Explanation:

How do you find the altitude of Polaris using Latitude and Longitude?

Answers

Answer:

At the Equator (0° of latitude), the North Star is on the horizon, making an angle of 0°. For any point between the Equator and the North Pole, latitude is obtained simply by measuring the altitude of Polaris: at 30°N the star is 30° above the horizon, at 63°N, it is 63° above the horizon, and so on.

Pls help me for brainliest

Answers

Answer:

b new experiments will be conducted until evidence supporting the accepted theories is obtained

Answer:

C. The accepted theory will be revised or replaced

Help identifying plant parts

Answers

Answer:

a: pistil b: stigma c: style d: stamen f: anther g: filament e: petal h: sepal i: stem j: ovule/ovary? k:?

Can you apply your knowledge of reproduction and protein synthesis to explain why offspring and parents have similar traits?​

Answers

Answer:

Offspring acquire a mix of traits from their biological parents. In each kind of organism there is variation in the traits themselves, and different kinds of organisms may have different versions of the trait.

Explanation:

What organ works to keep you blood plasma isotonic, so that your blood cells do not shrivel up or explode?
liver
heart
kindneys
urinary bladder

Answers

Answer:

Kidneys

Explanation:

how does the sporophyte obtain nutritions?

Answers

Answer:

The gametophte is generally green and photosynthetic and obtains water and other nutrients from the soil by direct absorption into it's cells .

Explanation:

how does an inclined plane affect the work that is done on an object?

Answers

inclined plane allows the same work to be done with a smaller force exerted over a greater distance.

Which of the following is a producer?

sunflower
human
cow
mouse

Answers

Answer:

A sunflower would be a producer out of the following.

Explanation:

The following people, cow, and mouse are consumers as the sunflower is a producer since it can produce it's own food as the others eat each other to recieve energy.

The following is a producer: sunflower, which is in the first option. Producers are always present at the primary trophic level and take part in the photosynthesis process.

What is the significance of the producer in the ecosystem?

A producer in the ecosystem has a significant role, as they play an important role in the ecosystem by producing their own food and later relying others for food and energy. They are also responsible for maintaining the carbon ,nitrogen, and oxygen balance in the atmosphere and maintaining the water balance by absorbing it in the ground and thus raising the groundwater level.

Hence, the following is a producer: sunflower, which is in the first option. Producers are always present at the primary trophic level and take part in the photosynthesis process.

Learn more about the producers in the ecosystem here.

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I am the mythological figure who ferried the dead across the River Styx into Hades (the underworld). Who am I? (Hint: I am a moon)

Answers

Answer:

Charon

because it is the name of the son of Erebus and Nyx and it is the name of the largest of Pluto's five moons

Answer:

Charon

Explanation:

Charon, in Greek myth, is the son of Erebus and Nyx, his duty was to ferry over the Rivers Styx and Acheron with the dead.

Which regions of the river in the figure above contain more nutrients than the other regions? Explain.

Answers

Answer:

Hello. You don't know what this question refers to, but the regions of the rivers that have more nutrients are those that have a lot of algae and vegetables and few fish and marine animals in general.

Explanation:

The accumulation of nutrients in rivers, mainly nitrogen and phosphorus, stimulates the primary production of this environment, which is represented by the excessive growth of algae and other vegetables, which often end up dominating the entire surface of the river. This is very harmful for aquatic animals as it decreases the oxygen concentration of the river, leading to the death of several animals, especially fish. For this reason, we can say that the areas with the most nutrients in a river will have a large number of algae and a low number of fish.


The average time for one complete cell cycle is 20 hours in a normal chicken
cell. What would you expect to see in a cancerous chicken cell?
O Cancerous chicken cells and normal cells will have the same total amount of time
to complete the cell cycle.
O Cancerous cells will complete mitosis in a shorter amount of time.
Cancerous cells will spend more time in interphase.
ct Cancerous cells will not complete
phases of the cell cycle.

Answers

Answer:

B. Cancerous cells will complete mitosis in a shorter amount of time.

Explanation:

Cancer cells reproduce quicker as they dont have control of their growth rate.

based on the data, was Zack, who ate the tofu, guilty of leaving a mess in the classroom?

Answers

Answer:

no.

Explanation:

The mystery food sample did not test positive for protein using the Biuret indicator, so the sample can not be tofu, which is what Zack ate.

All cells have

A. an internal fluid that gives shape to the cell and supports the other things within it.

B. All of the above

C. either a central zone or a nucleus that contains the cell’s genes.

D. a covering called a plasma membrane that surrounds the cell and controls what information and materials enter and leave it.

Answers

Answer:

all of the above

Explanation:

brainliest please

The answer is B trust me I just did this and got 100% hopefully that helps

A new species of mouse is introduced into an
environment. These mice reproduce and the
population grows. As the population grows, food
resources diminish and predation by hawks increases
Eventually, the number of mice in the environment
levels off so that the rate of birth equals the rate of
death. What is this nearly constant number of
organisms called?
A. carrying capacity
B. exponential growth
C. lirear growth
D. competitive edge

Answers

Answer:

A, carrying capacity

Explanation:

Carrying capacity is the maximum population size that can be sustained in a specific environment.

Environmental issues can only be dealt with globally not locally. true or false

Answers

Answer:

True

Explanation:

Because both can be cause and likewise can find the solution

Use the data you've recorded from the previous activity to arrange the rock layers from oldest to youngest on the

geologic time scale. Determine the identity of the unknown fossil by using the Fossils chart.

TOOLS

Paleozoic Era

433 417

359

542

490

299

250

+

+

million

years ago

Basalt

Limestone with

unknown fossil

Cambrian

Ordovician

Silurian

Devonian

Carboniferous

Permian

Sandstone with

trilobite

Shale with

ammonite

Che

Answers

Answer: Cambrian is 542

Ordovician is 490 to 433

Devonian is 417 to 359

Permian is 299 to 250

Explanation: I just got it right hope this help you enjoy

3. Some unicellular eukaryotes, called , contain chloroplasts

Answers

Answer:

algae

Explanation:

If there are about 6000 million people on the Earth, how many cells have you got in your body?

Answers

Answer:

6000 million people on the earth

we get trillion or trillion and so more.

PLEASE HELP!! NEED FAST ANSWERS!!!! WILL AWARD BRAINLIEST!!

The ostrich is a bird. However, it has traits that are different from those of the birds we typically see flying around our neighborhoods. Using credible sources, investigate the environment and adaptations of ostriches to explain how they evolved to survive in their environment.

Answers

Answer:

The reason for the Ostriches way of being like this with the adaptions of strong legs and increased weight and it being flightless bird are because of the environment they live in where the air is to dangerous and also of the predators that live in their environment. It is flightless and is because of the environment it lives in causing them to have to change and adapt and is the reason why they are not like other birds that can fly and why they have such strong legs instead.

Explanation:hope this helps

Ostriches have evolved unique traits to survive in their environment, which is primarily characterized by vast open spaces and arid landscapes.

Ostriches are native to the African savannas and deserts, where they have adapted to cope with the challenges of their environment. Their long, muscular legs allow them to cover large distances efficiently, making them well-suited for evading predators and finding food and water in the expansive and often unforgiving landscapes they inhabit.

Ostriches have evolved differently from typical flying birds, as their wings have become reduced in size. While they cannot fly, their wings serve as important stabilizers during running and courtship displays. These adaptations are a response to the selective pressures of their environment, where flight is less advantageous compared to running.  

To know more about traits here

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i am not good at bio aka life so i need help with 19 and 20

Answers

Answer:

#19 = The cell is an animal cell because it's missing the organelles required in plant cells(chloroplast, vacuoles, and the cell wall)

#20 = The mitochondria would be most likely to be affected because it's the powerhouse of the cell, provides energy, and imports proteins. I hope this helps.

Explanation:

Help me anyone please

Answers

Answer:

I think plant is the best answer of this question

Explanation:

Plant algea and a group of a bacteria called cyanobacteria are the only organism capable of performing photosynthesis.

Can someone think about a question on Cellular respiration? Help ​

Answers

Answer:

What is the name of the high-energy molecule used by cells?

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