In the lungs' millions of alveoli and the capillaries that surround them, gas exchange occurs. As seen in the diagram below, breathed oxygen travels from the alveoli to the capillaries' blood, while carbon dioxide travels from the capillaries' blood to the air in the alveoli.
Oxygen is carried by the air we breathe, which raises the amount of oxygen in the blood that circulates throughout the body. The blood's levels of carbon dioxide rise as it travels back to the lungs, discharging it from there and into the atmosphere. In order to increase the rate of diffusion, breathing in and out (a ventilation mechanism) maintains a sharp concentration gradient between the oxygen (and carbon dioxide) in the alveoli and the blood.
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What are the two functions of the nervous system? *
A. Provides stucture and protection
B. Sends and recieves signals throughout the body
C. Obtain nutrients and removes waste produced by the body
D. Regulates body temperature and protects the body from damage
Help please
Answer:
B. Sends and receives signals throughout the body.
Answer:
sends and receives signals throughout the body
hope it helps
how are macromolecules used in the body? (2-3 sentences)
The human circulatory system is a double circulatory system.
Some animals such as fish have a single circulatory system.
In both systems, blood is transported in arteries and veins
State the main function of arteries
HELP! VERY EASY!! GIVING BRAINLIEST!!! 15 POINTS HURRY!!
Answer:
c is the correct answer
Explanation:
Which of the following should occur first by investigators?
O clean the blood
O photograph blood stain
O test for DNA
O package the stained object
Answer:
the last one
Explanation:
yh the lastnone
Disease causing bacteria is called??
Decomposers
Toxic
Pathogenic
Nonpathogenic
Answer:
Pathogenic
Explanation:
When you drop oil into cup of water, why does it hold together instead of breaking up in the water? Name at least three common substances which are examples of lipids that relate to the following areas of life: driving, eating, and your own body.
9. Which diagram in Figure 1.19 represents single type of a human tissue?
(3) Kidney
(4) Digestive System
(1)Neuron
(2) Muscle
Answer: kidney
Explanation:
Some plants have a waxy covering on their leaves. How does the waxy covering help
the plant to survive?
O It allows the plant leaves to grow wider and collect more sunlight.
It discourages predators from eating the plant.
It helps the plant reproduce faster in colder environments.
O It helps the plant keep its moisture in hot weather conditions.
Answer:
It helps the plant retain water.
The waxy covering on plant leaves, young stems, and fruit is called the "cuticle". It is composed of cutin, a wax-like material produced by the plant that is chemically a hydroxy fatty acid. The purpose of this covering is to help the plant retain water.
Answer:
D. It helps the plant keep its moisture in hot weather conditions.
Explanation:
for some reason it wouldn't let me type out the question, I'll try to type it in the comments so you can see what it says. Every time I tried to type it as the question it said that it contains forbidden language and I did everything and nothing was working
never mind I just tried type it in the comments and it won't work, I hope you're able to read it
Answer:
a. het
b. Hom dom
c. het
d. hom rec
e. Hom dom
f. hom rec
g. het
h. hom rex
I. hom dom
j. hom rec
k. hom dom
l. het
m. het
n. hom rec
o. het
p. hom dom
An understanding of biology can help you to make informed choices about the ____________________________________________.
a. food you eat
b. food you eat and fluids your drink
c. medications and supplements you ingest
d. All of the above are correct
PLEASE DONT GET ME WRONG
Answer:
d
Explanation:
A large population of lizards inhabits an island that no
other species are able to access. The island is pristine and
no new mutations have been recorded in this lizard
population. Herpetologists have identified that the female
lizards are more likely to mate with male lizards with the
brightest orange underbellies. This population is at Hardy-
Weinberg equilibrium. True or False?
TRUE
FALSE
This is the ultimate source of our energy
Answer:
yes thats right, its the sun
PLEASEEEE HELPPPP!!!!!!
Answer:
I dont know what your asking but ill try to answer it
Explanation:
Prey population is going up over time than the predator population has.
Urgent!!!
What are wholesale sales?
O Large orders that receive a discount.
O Everything that is included in a single order to a customer.
O Sales made in bulk to another business.
O Sales of generic-brand or out-of-season items.
Answer:
Sales made in bulk to another business
how is population dynamics affected by water pollution
Answer:
As population density increases the demand for the limited fresh water also increases. in most of the case, the water is not treated properly and as such it leads to pollution of surface - level fresh water, and seeps into the ground, polluting ground water as well
what is wrong with this statement?: sperm and egg cells go through mitosis and divide a total of 1 time
I will give you the brain thing if you help me this correct way
Need help with this question, thanks :)
Answer:
A. White dwarf
Rocks change during metamorphism because the minerals need to be stable under the new temperature and pressure conditions. While metamorphic rocks are forming, the extreme heat changes the size and shape of the mineral grains in the rock.
Which statement describes the effect of the conditions described in this passage?
A. The need for stability may cause the structure of minerals to rearrange and form
new minerals
B. Great pressure from tectonic plate collisions can change rock into metamorphic
rock
C. The high temperatures of the magma can change nearby rock into metamorphic
rock
D. Metamorphic rocks are classified according to the arrangement of the grains in
their makeup
PLS HELP ME !!!!!!!!!!!!! i made another question 2 hrs ago with the same question and nobody answered it so pls help :((((((((
Answer:
B
Explanation:
I think it's b, but I'm not so sure
Identify the phase of mitosis described in each step, and then put the steps in the correct order.
a) Cell membrane pinches inward, dividing the cytoplasm and its contents
b) Nuclear membrane reforms and chromosomes uncoil
c) DNA and histones condense; nucleus begins to break down
d) Chromatids separate and move to opposite sides of the cell
e) Chromosomes line up along cell equator; spindle fibers attach to each chromosome
Answer:
i think its c
Explanation:
(25) A farmer wants to improve the yield of tomatoes from his plants.
The farmer chooses the plants that produce the best yield of tomatoes to produce
the next generation of tomato plants.
This is repeated for several generations.
What is the name of this process?
A adaptation
B fertilization
C population growth
D selective breeding
Answer:
D is your answer
Explanation:
Please help will give brainliest
Answer:
B
Explanation:
Hope this helps have a nice day.
*You don't have to read this part*
Since Canis is a proper noun then C and B should be emilinated.
Lupus is also a proper noun therefore A being eliminated.
Thats how I got B.
The image depicts the impact of a mutagen on the phenotype of F1 and F2 offspring in nematodes, a common roundworm. Which
arguments can be made based on the information in the model You may select more than one correct choice.
Answer:
A, D, E
Explanation:
just did it
The arguments that can be made based on the information in the model are as follows:
The mutated DNA is a recessive allele. The mutagen altered the DNA of the worm in the parental generation. The DNA altered by the mutagen occurs in gamete cells and is passed to offspring.Thus, the correct options for this question are A, D, and E.
What is Mutagen?Mutagen may be characterized as a type of agent that possesses the capability to induce mutation within the genetic segment of living organisms. Mutagens are of two types, they are:
Physical mutagens: UV radiations.Chemical mutagens: Chemicals like ethidium bromide.According to the context of this question, mutation can only be inherited from parent to offspring, if it is induced within the gamete cells of parents. While during the course of life, the mutation also induces in the genomic sequence of an individual.
Therefore, the correct options for this question are A, D, and E.
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Biology 9th grade need help asap please
The sides or backbone of DNA is made up of what two molecules? (green in the diagram below)
Multiple choice answers
-Sugar-Nitrogen Base
-Sugar-Phosphate
-Phosphate-Nitrogen Base
-All sugar molecules
Answer: A sugar-phosphate backbone (alternating grey-dark grey) joins together nucleotides in a DNA sequence. The sugar-phosphate backbone forms the structural framework of nucleic acids, including DNA and RNA. This backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.
Explanation:
Answe
???
Explantion hehehehehehheheheh
fill in the planks plz help am givng brainliest
What can be done to fight deforestation? Choose ALL that apply. There are multiple answers here.
a
Demand forest products from sustainable sources
b
Reduce use of products made from wood fiber including paper and cardboard
c
Leave forests standing and plant more trees
d
strengthen plans in communities to remove large and small native trees
Answer:
A b and c
Explanation:
Nuclear power plants do not release smoke and ash into the air.
True
False
Write a poem about symbiotic relationships. It must include Commensalism Mutualism, Parasitism, Competition, and Predation.
Answer:
Explanation about Commensalism Mutualism, Parasitism, Competition, and Predation are given below.
Explanation:
There are various symbiotic relationship formed between the organisms present in the environment. These relationships are Commensalism Mutualism, Parasitism, Competition, and Predation. In Commensalism relationship, one organisms gets benefits while the other neither get benefit nor harm. In mutualism, both organisms gets benefits from one another. In Parasitism, one organism get benefits and the other get harmed. In Competition, both organisms cause harm to one another and both are damaged through their actions and in Predation, one organism is benefited by killing the other organism to feed itself.
An igneous rock contains
large crystals of quartz, feldspar, and horn-
blende. How did the rock most likely form?