Why does blood return from the lungs
to the heart?

Answers

Answer 1

Answer:

the blood gets oxygen in the lungs its called oxy-rich blood (im pretty sure this is correct)

Explanation:


Related Questions

Which organism receives the least amount of energy from the producer?

a
Owl

b
Grasshopper

c
Lilypad

d
Mouse

Answers

The owl would have the least amount of energy from the producer. The higher the organism is on the food pyramid, the less energy it will receive from the producer. For example, if grass is a producer, it has the most energy. Then, if a bunny eats the grass, it takes a part of the grass’s energy but does not take all of the energy. Then, a wolf eats the bunny. The wolf gets a part of the bunny’s energy but not all. The wolf has received the least amount of energy from the grass.

what is the definition of soluble?​

Answers

Answer:

soluble means that it is capable of being dissolved in water

Explanation:

Answer:

able to be dissolved, especially in water.

Explanation:

Identify an organism that the giant tortoise competes with

Answers

Answer:

Threats

Explanation:

The giant tortoise is threatened by introduced species to the islands, such as dogs and cats which prey on young tortoises, and cattle which compete for grazing vegetation. 

Why does DNA make a copy of itself during cell division?
A. To make sure that the two new cells can make the same proteins
as the parent cell
B. To make sure that the two new cells have slightly different genetic
codes
C. To carry amino acids out of the nucleus
D. To expose the genes that code for the needed proteins HELP FAST

Answers

Answer:

its A

Explanation:

I took the test

Plss help me with this carbon cycle!!!!

Answers

Answer:

Plants photosynthesize, so they need, thus absorbs carbon dioxide. Marine plants also need carbon dioxide for photosynthesis so they absorb. Dead plant and animal matter decay to release carbon dioxide as a result.

A carbon footprint refers to the greenhouse gas emissions caused both directly, and indirectly, by an individual, a product, an organization, or an event.

What tools can be used to make observations of the color of a mineral

Answers

Answer:

You can identify a mineral by its appearance and other properties. The color and luster describe the appearance of a mineral, and streak describes the color of the powdered mineral. Each mineral has a characteristic density.

Explanation:

:)

Which of these is a downside of natural gas?

Answers

Answer:

B, extraction through fracking can contaminate groundwater.

Explanation:

Well, it's really the only downside available. Hope this helps :)

The answer is B :) I hope this helps!

Select all that are true about genes and proteins

Proteins are responsible for the variation of birth rates we see in a species

a) A codon has the instructions for a protein
b) If a protein's shape changes, the function changes as well
c) There are 46 amino acids
d) Proteins are responsible for the variation of traits we see in a species
e) Some genes have no function at all
f) A codon has the instructions for an amino acid

Answers

Answer:

E, D, A

Explanation:

No explanation thats whats responsible. A brainliest will be nice

I have no idea what the answer is but ill give points for CORRECT answers only!!!

Answers

Answer:

A

Explanation:

From the time a baby is born, what is she or he eager to do?
A. Explore her world and interact with others
B. Smile at her parents and primary caregivers
C. Sleep the majority of the time
D. Play with her parents, primary caregivers, and toys​

Answers

Answer:

D. Play with her parents, primary caregivers, and toys

Answer:

D. Play with her parents, primary caregivers, and toys​

Explanation:

does atoms of the same elements have the same number of pruton​

Answers

Answer:

all atoms of element have the same amount of protons

Explanation:

HELLLLPPPPPPPPPPPLEASEEE
Jessica learns that two organisms are members of the same class. Which can she also infer is true?

The organisms are members of the same order.

The organisms are members of the same family.

The organisms are members of the same genus.

The organisms are members of the same phylum.

Answers

answer:

The organisms are members of the same family.

this is the answer.

The tall wetland plant, purple loosestrife, was brought from Europe to the
United States in the early 1800s as a garden plant. The plant's growth is now
so widespread across the United States that it is crowding out a number of
native plants. This situation is an example of

Answers

This plant is an invasive species.

Answer: an unintended effect of adding a species to an ecosystem.

As a naturalist, you are responsible for training volunteers in the identification of the types of amphibians. The volunteers will use this information to correctly describe the animals to school groups that will visit your nature center. The training documentation for the volunteers lists important characteristics of the different groups of amphibians, but you notice that one of the items on the list is incorrect. Indicate which description is not correct.
A. Frogs, toads, and most salamanders have four legs whereas caecilians are legless.
B. While some frogs may advertise their distasteful nature by bright coloration, salamanders always have cryptic coloration.
C. Some adult salamanders retain larval characteristics such as external gills.
D. Most caecilians can be found burrowing in the soil of tropical forests.

Answers

Answer:

B. While some frogs may advertise their distasteful nature by bright coloration, salamanders always have cryptic coloration.

Explanation:

Amphibians are vertebrates which can live both on land and in water. they are cold-blooded and therefore, depend on warmth from sunlight to become warm and active. Their young live fully in water respire using gills. The adults have moist skins through which they respire and therefore, live in moist places or near water to keep their bodies from drying out. Many adult amphibians also have poison-producing glands in their skin to ward off predators. Poisonous amphibians usually display a warning coloration. . The species in this group include frogs, toads, salamanders, caecilians and newts.

Considering the above descriptions:

A. Frogs, toads, and most salamanders have four legs whereas caecilians are legless.

True: Caecilians are a group of limbless, wormlike or serpentine amphibians that mostly live in underground burrows or in substratum of shallow streams.

B. While some frogs may advertise their distasteful nature by bright coloration, salamanders always have cryptic coloration.

False: Some frogs such as poison frogs as well as some salamanders such as the California newt and the red eft which a brightly colored terrestrial juvenile form of the eastern newt is highly poisonous. advertise their distasteful nature by bright coloration.

C. Some adult salamanders retain larval characteristics such as external gills.

True: Some adult salamanders retain larval characteristics such as external gills. e.g. species such as the mudpuppy (Necturus maculosus) retain their gills throughout their lives.

D. Most caecilians can be found burrowing in the soil of tropical forests.

True: Caecilians are a group of limbless, wormlike or serpentine amphibians that mostly live in underground burrows or in substratum of shallow streams.

4.
Which of the following is not a negative impact of invasive species?
A.
There is decreased competition with native species.
B.
Native species are crowded out or replaced.
C.
The carrying capacity of the habitat is decreased.
D.
There is increased competition with native species

Answers

The answer is A

Good luck!

Given is a strand of DNA, fill in the corresponding RNA strand and find which amino acids that strand codes for.

Please help!

Answers

Answer:

RNA: [tex]A-U-G-U-A-U-A-C-G-G-A-U-U-G-A[/tex]

Amino acids: Methionine, Tyrosine, Threonine, Aspartic Acid

Explanation:

1) First, transcribe the DNA to RNA. For each nitrogenous base (to put it simply, the letter) listed in the DNA strand, write the strand of RNA with the matching nitrogenous base. Remember that, when transcribing, the thymine (T) from DNA can pair with adenine (A) in the RNA, adenine (A) pairs with uracil (U), and cytosine (C) and guanine (G) always pair with another.

DNA: [tex]T-A-C-A-T-A-T-G-C-C-T-A-A-C-T[/tex]

RNA: [tex]A-U-G-U-A-U-A-C-G-G-A-U-U-G-A[/tex]

2) Next, to find the amino acids the strand codes for, read the nitrogenous bases in the RNA from left to right in groups of three, or codons. Then, using a codon chart, find which amino acid the group of three bases codes for. This gives the following answer below. (Remember that the codon UGA stops the translation and therefore does not code for an amino acid.)

Amino acids: Methionine, Tyrosine, Threonine, Aspartic Acid

Amino acids: Methionine, Tyrosine, Threonine, Aspartic Acid

What are amino acids?

Amino acids are the building blocks of protein. Proteins are long chains of amino acids. Your body has thousands of different proteins that each have important jobs. Each protein has its own sequence of amino acids.

Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although hundreds of amino acids exist in nature, by far the most important are the alpha-amino acids.

The human body uses amino acids to make proteins to help the body: Break down food. Grow. Repair body tissue.

Learn more about amino acids:

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Which kind of action is a cause of air pollution? A. Trash is dropped in a national wildlife preserve. B. Poisons are released into a major river. C. Tuna are fished to extinction. D. Gasoline is burned by a car engine.

Answers

Answer: D

Explanation: when gasoline is burned by the car, it releases gas which pollutes the air.

D. Gasoline is burned by a car engine.
(Good luck!!)

Which of the following best describes a precipitate?



A measure of mass per unit of volume


A solid separated from a solution


A form of weather


A clear indication of a physical change

Answers

Answer:

In chimica, un precipitato è un solido insolubile che emerge da una soluzione liquida. L'emergenza del solido insolubile dalla soluzione è chiamata precipitazione. Spesso il precipitato emerge come una sospensione. I precipitati possono formarsi quando due sali solubili reagiscono in soluzione per formare uno o più prodotti insolubili.

Explanation:

A solid separated from a solution best describes a precipitate. So, the correct option is B.

What is Precipitate?

Precipitation is the process of formation of a solid substance in a solution, either by physical mixing of low-solubility chemicals or by a chemical reaction of two or more compounds. Precipitate refers to the solid that eventually forms as a result. A solid that separates from a solution during a chemical reaction is known as a precipitate.

When two or more compounds are combined, they react to form an insoluble product, which is how it is formed. A precipitate may take the form of a suspension in solution or a solid that settles to the bottom of a solution. It can be removed from a liquid using a number of techniques, including filtration and centrifugation. Many chemical reactions require precipitates, which are often used to separate, purify, or identify different compounds.

Therefore, the correct option is B.

Learn more about Precipitate, here:

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PLEASE HELP What is a similarity between the first-quarter moon and the third-quarter moon? (1 point)


The moon is located between Earth and the sun.


The moon is always waning in both phases.


The moon is always waxing in both phases.


The moon is located perpendicular to Earth and the sun.

Answers

Answer:

The moon is located perpendicular to Earth and the sun.

The moon is located between earth and the sun

Can a gene mutation that does not influence phenotype be considered an adaptation? Why or why not?

Answers

Answer:

No; only a small percentage of mutations cause genetic disorders—most have no impact on health or development. For example, some mutations alter a gene's DNA sequence but do not change the function of the protein made by the gene.

Explanation:

What is the main source of energy for the world

Answers

the sun ————————————

Can someone please do a summary on how wind works? 7-9 sentences please I will mark brainliest!

Answers

Answer:

Wind is the movement of air. It forms when air moves from areas of high-pressure to areas of low pressure. These pressure differences are caused by temperature differences on Earth's surface. The movement is a result of different places on Earth receiving different amounts of energy from the sun. Two types of winds are global and local. Global wind systems determine weather patterns for the entire planet. Local winds are sea and land breezes that occur due to uneven absorption of solar energy.

Explanation:

hope this helps :D

CAN YOU HELP MD PLEASEEE ITS BIOLOGY!!! THANK YOUUU

Answers

Answer:

yeah of course

1 ) answer is protist

2) Eubacteria

3) Animal

Chef Brandi suffered a bum on her arm when a kettle of spaghetti sauce exploded. The doctor, using a forceps, pulls on a hair within the
area that is burned. The hair easily pulls out. What degree of burn did the patient have?

Answers

Answer:

2degree burn

Explanation:

it has moist layer of skin and it affects the outer and middle layers of your skin the hair is present in human body . hope you find it useful

Eukaryotic cells are larger than prokaryotic cells.
True
False

Answers

I honestly don’t know hope u get it! 12343578

If a certain species of brown bird is crossed with a white one all the offspring are tan. If these offspring were crossed and produced 20 individuals in the f2 generation what colors and ratios would be expected?

Answers

Answer:

In the f2 generation:

10 of offspring would be tan (ratio form - 10:20)

5 of offspring would be white (ratio form - 5:20)

5 of offspring would be brown (ratio form - 5:20)

Why is ATP like a charger battery and ADP is like an uncharged battery ?

Answers

Answer:

When a cell has no available energy, it is able to store energy by adding a phosphate group to an ADP (adenosine diphosphate) molecule. The ATP molecule that results is like a battery because both the molecule and a battery contain stored energy, while, on the other hand, ADP is a partially charged battery.

Explanation:

hope this helped Mark BRAINLEST!

How many nucleotides are there in 5 codons?


Who can help me

Answers

Answer:

15 because one codon has 3 nucleotides

Explanation:

One codons is a sequence of 3 DNA or 3 RNA nucleotides. Therefore, 5 condones have, 3•5=15, 15 nucleotides.

Mendel demonstrated which of the following about inherited traits? Check all that apply.
certain traits are more likely to appear than their alternatives.
some traits show blending inheritance.
traits segregate among the offspring of a cross.
traits can be hidden in some generations, but subsequently reappear unchanged in future
generations.
parents that both have the same trait can have offspring with an alternative trait.

Answers

Answer:

The correct answer would be -

certain traits are more likely to appear than their alternatives.

traits segregate among the offspring of a cross.

traits can be hidden in some generations, but subsequently, reappear unchanged in future generations.

parents that both have the same trait can have offspring with an alternative trait.

Explanation:

Mendel is known as the father of genetics for his tremendous work in the field of genetics by performing experiments on the pea plants which contribute to the make the law of inheritance. According to all three laws of inheritance and experiments performed by Mendel, he demonstrated inheritance patterns in the traits or the alleles inherited to the next generation.

Certain traits that are dominant are more likely to appear than their recessive alternatives. Trait segregates when gametes form during the cross. In heterozygous cases, some traits can be hidden but can reappear unchanged in future generations.

What is the answer to this question 11

Answers

Answer:

11 = multicellular ; autotroph

option D

hope it helps

The answer is D.
Multicellular, and autotroph
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