How are carbon dioxide and oxygen exchanged in the lungs?
A. Large blood vessels constrict and enlarge near the the lung tissue so gases can be exchanged.
B. Carbon dioxide and oxygen are exchanged in the aorta.
C. Small blood vessels pass next to the air sacs of the lung, gases are exchanged across a thin membrane.

D. The walls of the arteries thicken, harden, and lose their elasticity so that oxygen can pass through them.

Lung air sacs are surrounded by small blood veins, and a thin membrane allows for the exchange of gases (option C).

The chemical process that generates energy and powers the metabolisms of most living things, respiration, depends heavily on oxygen. The oxygen in the air that we breathe is essential for the survival of humans and many other animals.

The sole sort of atom in oxygen makes it a chemical element, which is a substance. An oxidizing agent has eight atoms in its nucleus, as indicated by its atomic number of 8, which is represented by the letter O in its official chemical formula. At room temperature, oxygen is a gas that lacks all other flavors, smells, and colors. Molecular oxygen can be found in nature.

To know more about Oxygen visit:

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How many fundamental laws of inheritance did Gregor Mendel come up with?

Identity the process that occurs in this organelle, and explain the importance of
this process to the survival of organisms

Which are characteristics of all bacteria? Check all that apply.

They lack a nucleus.
They have a nucleus.
They eat other organisms.
They make their own food.
They are eukaryotes.
They are prokaryot

1. An object that has an equal amount of protons and electrons would be
I
A. electrically charged
B. electric field
C. electric force
D. electrically neutral

Common vectors Include:
A) Bats
B) Mosquitoes
C) Ticks
D) All answers are correct​

Mountains: planet earth worksheet answer. There ARE PICTURES INCLUDED

4. Why do koalas smell like cough drops?

The picture shows a temperate forest biome.



The soil in a temperate forest biome is very fertile. Which feature of this biome causes fertile soil?
A
The warm summers dry out the soil, which increases the concentration of nutrients.

B
The leaves fall off the trees each year and decay, which provides nutrients to the soil.

C
The dry climate is ideal for weathering rocks and other materials, and this creates more soil.

D
The animals hibernate each winter, and the soil can make more nutrients wi

Click the link which illustrates tectonic plates and other features. Use this information to answer the question.

Where are most earthquakes found?

in the middle of continents
under the ocean only
along plate boundaries
along the equator

The first species we see in this area is Globus slimius. Describe a scenario which may have led to the extinction or evolution of the Globus slimius species. Why would this scenario have led to the organism's extinction or evolution?

if you found 20% thymine in a sample of DNA, how much cytosine would you find?

A. 80%
B. 20%
C. you cant be sure without knowing how much guanine is in the sample
D.30%

when was the lion fish introduced into the southeastern waters of the united states?

What should be the genotypes of the parent flowers (P generation) if he wants to ensure that all of the flowers in the F1 generation are tall and yellow?

need help will give brainlist!

How can the amino acid chain of one protein be different from the amino acid chain of another protein?

What is the correct measurement?

A.36.5
B.33.3
C.32
D.37

when a sperm and egg cell combine, the new cell called a zygote contains:

1: 46 chromosomes
2: 23 pairs
3: 22 chromosomes
4: no pairs

Members of a population belong to

A virus is a nonliving thing,
therefore it needs which of
the following to be able to
reproduce?
A. a nonliving parasite
B. nothing at all
C. a living host
D. a special type of
plant

what are the three domains in the new system of taxonomy.
​

PLS ANSWER What happens to glucose and oxygen that is produced by plants during photosynthesis?

¿ la masa de un reactivo era diferente a la de otro?​

Sarah is heterozygous for type A blood and her husband, Michael, has type B blood. Their child has type O blood. What possible genotypes can Sarah's blood be? *
10 points
AO
BB
AB
BO

did i choose the right answer in the pic below?

A cross between a black cow and a white cow produces a cow that is black and white spotted. If two heterozygous cows are mated, what percentage of their offspring will be spotted? *
10 points
25%
50%
75%
100%

PLEASE PLEASE PLEASE HELP ME WITH THIS!! ONCE I FIGURE OUT HOW I'LL MARK BRAINLIEST (or however you spell it)!!

How did it infect the human population

Enzymes are proteins that impact chemical reactions in cells. Which statement describes the conditions under which enzymes are most effective?​

Bacteria cells can be used to produce insulin for the treatment of diabetes in humans. Which best explains how the bacteria cells are able to produce insulin for humans? (8.L.2.1) *
A. The bacteria have been grown on a petri dish containing insulin.
B. The bacteria have been genetically engineered to contain the DNA needed to produce insulin.
C. The bacteria have been exposed to radioactivity to create mutant strains capable of producing insulin.
D. The bacteria have been grown on a petri dish containing sugar; the bacteria produce insulin in response to the sugar.

What are the products of photosynthesis? .-.