Your nose and your mouth are both a portal of entry into your body. If you cover one and not the other it defeats the purpose because Bacteria can still enter the system. They are both part of your respiratory system.
ANWSER ASAP 20 POINTS!!!1 RIGHT AWNSER GET BRAINLIEST
Which of these statements best explains how natural selection provides evidence to the scientific theory of evolution? (4 points)
It shows how organisms choose to adapt to changing Earth conditions.
It proves that natural selection always leads to greater complexity in organisms.
It shows how organisms with perfect traits can be created to suit the environment.
It proves that some organisms with specific adaptations survive better than others.
Answer:
It's either the 3rd or 4th one.
Explanation:
Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes that are passed on from parent to offspring during reproduction.
In the biogeochemical cycle for carbon, the same atoms of this element are moved and recycled around the planet through which spheres of earth?
A.Biosphere and geosphere
B.Biosphere, hydrosphere, and geosphere
C.Atmosphere and cryosphere
D.Atmosphere, biosphere, geosphere, and hydrosphere
Answer:
I think the answer is D. Atmosphere, biosphere, geosphere, and hydrosphere
Hope you have a good day :D
In the Biogeochemical cycle for carbon, the same atoms of this elements are moved and recycled around the planet through the Atmosphere, biosphere, geosphere, and Hydrosphere. Hence answer is option D.
Biogeochemical CycleThe term biogeochemical cycle is related the circulation of essential matters like biological, geological, and chemical matters from abiotic to biotic components and vice versa.
These are the cycle of carbon elements which moved and recycled through atmosphere, biosphere, geosphere, and hydrosphere. Hence the correct option is D.
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Brad was provided with a piece of bread and egg yolk. He wants to know which component is present in the given food. Suggest him the scientific procedures to find the right component present in each food item.
Answer: Please see explanation column
Explanation:
Sample provided to Brad = a piece of bread and egg yolk
1. We know that Bread is a carbohydrate containing starch
To investigate the presence of starch/ Carbohydrate in Bread
Materials: Bunsen burner,test tubes, food product -Bread,iodine solution
Method
1. Place a sample of bread into the test tube.
2. Place a few drops of iodine solution on the bread
3. Take observations.
4. Wait a few more minutes and note any other changes.
Observations
On addition of iodine to the bread , if we notice a blue-black coloration, we will conclude that the right component found in bread is starch /carbohydrate
The above procedure can also be confirmed using
-Molisch’s reagent–which gives us a purple or violet color ring on addition to the bread
- Fehling’s reagent –which gives a Red precipitate to indicate the presence of in the bread
-Benedict’s reagent –which gives Red precipitate to indicate the presence of carbohydrates in the bread.
-Tollen’s reagent – which gives us Silver mirror to confirm the presence of carbohydrate in the bread.
2. We know that egg yolk contains protein,
To investigate the presence of Protein in egg yolk using biuret test
Materials: Bunsen burner,test tube, food product -egg yolk , Aqueous copper sulfate solution
Method
1. Place a sample of egg yolk into the test tube.
2. Place a few drops of Aqueous copper sulfate solution on the sample of egg yolk
3. Note observations.
4. Wait a while and note any other changes.
Observations
On addition of Aqueous copper sulfate to the egg yolk , if we notice a violet coloration,we will conclude that the right component found in egg yolk is protein
The above procedure can also be confirmed using
Xanthoproteic test – which on addition of Nitric acid to the egg yolk gives a Yellow coloration
Millions test – which on addition of Mercuric sulfate in the presence of sodium nitrite and sulfuric acid to the sample of egg yolk gives Brick red color solution confirms the presence of proteins.
Ninhydrin test – which on addition of Pyridine solution of ninhydrin to the sample of egg yolk gives Violet color solution confirms the presence of proteins.
A small group of deer are forced to leave the herd in search of a new habitat with more food. If the allele frequencies of the small group is identical to that of the large population, which of the following statements apply?
Read this question carefully!
1Points
A
Genetic drift has not occurred.
B
The bottleneck effect has happened.
C
The two groups will become different species.
D
The genetic variation of each group will be altered.
Answer:
the genetic varation of each group will be altered
In the case when the allele frequencies of the small group should be same to the large population so here the genetic variation for each group should be changed.
What is genetic variation?It is the variation that shows the presenting of the differences with respect to the sequence of genes lies between the individual organism with respect to the species. Since the allele frequencies of the small group should be same to the large population so here the genetic variation for each group should be changed.
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When a warm front is approaching, what happens?
A. advancing cold air pushes up and over retreating warm air causing warm temperatures and mild rain
B. advancing warm air pushes up and over retreating cold air causing warm temperatures and mild rain
Answer:
The air mass behind a warm front is likely to be warmer and more moist than the one before the front. If a warm front is approaching, light rain or light winter precipitation is possible before and as the front passes. Behind the front, expect clearing skies, warmer temperatures and higher relative humdities.
Explanation:
(︶^︶)
A molecule that can mix with water and a store for energy in the body
Answer:
Glucose
Explanation:
Glucose is a source of energy and it is stored in the body (in the form of glycogen) and it can also dissolve in water
Answer:
liver is the answer plllllllll
Help!!!!!! This is a review NOT a test!!!! Marking brainliest!!!!
answer:
i believe you are correct
good luck :)
hopefully, this helps
have a great day !!
How does the ozone layer impact life on Earth?
a)
The ozone layer hole is the main reason for climate change
b)
It filters out harmful UV radiation from the sunlight
c)
It magnifies sunlight causing sunburn
d)
Aerosol cans still contain CFC's that thin the ozone
Answer:
It's 100% B
Explanation:
I just know it!!
this is total number of genes of every individual in an interbreeding population
Answer:
Gene pools are the total number of genes of every individual in an interbreeding population; contains variations in genes, the relative gene frequencies, and also the allele frequencies.Explanation:
Answer:
Explanation:
Gene pools are the total number of genes of every individual in an interbreeding population; contains variations in genes, the relative gene frequencies, and also the allele frequencies.
The processes involved with reproduction and nurturing a growing zygote
require energy use beyond normal maintenance. What is the best way certain
organisms reduce the energy costs of reproduction?
A. The parents each take turns nurturing the offspring.
B. They reproduce asexually.
C. They have multiple offspring in one pregnancy.
D. They reduce their gestation period.
Answer:
B. They reproduce asexually.
Explanation:
Asexual reproduction often known as abiogenetic multiplication requires just one parent organism and results in hereditary identical progeny (similar to a new copy). Since there is no blending of genetic data required and organisms don't have to invest energy finding a mate, populaces can increment quickly because of asexual generation. Thus, with the guide of asexual generation, the energy needed in the process associated with multiplication and nurturing is diminished contrasted with sexual reproduction.
In pea plants the trait for tall height is dominant over the trait for dwarf height. Which letter should be used to represent the genotype for plant height?
D
F
L
T
Answer:
The correct answer is - T.
Explanation:
Normally, the representation of the trait in the genotype of inheritance pattern is the first letter of the dominant character of the particular trait. In this case, the trait of the height of the pea plant is tall and dwarf.
Tall plants are dominant over the dwarf plant, therefore, the letter T would be used to represent the genotype for the height of pea plant, the small letter of the particular letter would be used to represent the alternate allele of the trait.
Answer:
T :) ️^m^
Explanation:
explain the difference between mechanical weathering and chemical weathering.
Answer:
below
Explanation:
Mechanical weathering breaks rocks into smaller pieces without changing their composition. Chemical weathering breaks down rocks by forming new minerals that are stable at the Earth's surface. Water, carbon dioxide, and oxygen are important agents of chemical weathering.
Which organelles make up animal cells? pls i have an assignment in 1 hr
Answer:
Organelles in animal cells include the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, vesicles, and vacuoles
Explanation:
Type of democracy where citizens elect leaders to represent them in government dictatorship representative democracy oligarchy anarchy
Answer:
representative democracy
Explanation:
Democracy can be defined as a government of the people, by the people and for the people.
There are two (2) main types of democracy and these include;
I. Representative democracy: it's also known as indirect democracy and can be defined as a form of government which typically involves the process of having the citizens of a particular country vote to elect representatives (political leaders) to enact laws, create policies and make decisions on their behalf.
Hence, representative democracy is a type of democracy where citizens elect leaders to represent them in government.
II. Direct democracy: it can be defined as a process which typically involves the candidates voting for their preferred choice. Thus, their choices are reflected directly on the subject matter.
Generally, the type of government in which legislators such as senators or house of representative members are found is known as a democracy and they are saddled with the responsibility of enacting or making laws.
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Which of the following genotypes for human blood type shows alleles that are codominant?
A. AO (or IAi)
B. AB (or I4IB)
C. BB (or IBIB)
D. AA (or IAIA)
Answer:
B
Explanation:
The IA and IB alleles are codominant, and the i allele is recessive.
Which is the best definition of weathering?
settling of Earth’s materials when water slows downb.swelling Earth’s materials as they soak up waterc.breaking up of rocks from wind, water, plants, or animalsd.transport of Earth’s materials by wind, water, or ice
Answer:
Breaking up of rocks from wind , water, plants or animals
Explanation:
this is called weathering
hope it helps
If you took DNA samples from two strangers on a street, how similar would
their DNA be?
A. 100% the same
B. 95.5% the same
C. 99.9% the same
D. 90.0% the same
If one took DNA samples from two strangers on a street, the two DNA samples will be 99.9% the same (option C).
What is DNA?DNA is the part of a living organism that carries or stores genetic information.
The DNA molecule is made up of four nucleotide bases namely;
AdenineGuanineCytosineThymineHowever, the DNA of every living organism is the same with the difference lying in the arrangement of the nucleotide sequence.
Therefore, if one took DNA samples from two strangers on a street, the two DNA samples will be 99.9% the same.
The 0.1% difference is attributed to the mutations that might have occured in the genome.
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Induced Pluripotent Stem Cells are:
Answer:
I think it's the first one
Describe two specific ways you plan to keep your heart healthy? please make it in your own words. I will give brainliest.
Answer:
1. to eat healthy food and drink lot's of water.
2. quit smoking and stay away from second hand smoke.
Explanation:
It's a matching question. I will give brainliest.
Answer:
1. B
2. C
3. D
4. A
Hope this helps
1. Cerebrum : b. the thinking part of the brain
2. Cerebellum : c. controls balance, movement, and coordination
3. Brain stem : d. keeps you breathing, digest food, and blood circulating
4. Spinal cord : a. a bundle of nerves that sends messages to your brain
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What could cause the differences in the amino acids sequences for these proteins in different organisms?
The reason of differences in the amino acids sequences with respect to the proteins in different organisms should be because of the sequence.
Reason of differences in the amino acids:The protein should be comprise of the polypeptide backbone along with the chains that are attached.
Each and every type of the protein should differed in the form of sequence and the no of amino acids.
Also, it does have the sequence of the chemically distinct side chains.
Therefore, in this way it have the difference.
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give an example of how an organism can use surface tension?
What is Endosymbiotic Theory ?
How does it explain Eukaryotic Cells?
What evidence do scientists have to support this theory ?
Based on the video of the amoeba sisters.
Answer:
1.States that organelles such as chloroplasts and mitochondria were once free-living prokaryotes which eventually lived symbiotically within larger cells, forming modern day eukaryotes.
2.Eukaryote, any cell or organism that possesses a clearly defined nucleus. The eukaryotic cell has a nuclear membrane that surrounds the nucleus, in which the well-defined chromosomes (bodies containing the hereditary material) are located.
.
In which of the following scenarios is chemical energy is transformed into thermal energy?
A squirrel uses the energy in seeds to build structures in its body
A tree captures sunlight to produce the sugars it uses for food
A fish is able to swim using the energy it gets from eating plants
A lion’s temperature increases as it uses the energy it gets from its prey
Answer:
A.
Explanation:
Phenylketonuria (PKU) is a disease that is caused by the mutation of a single gene. The mutation can cause several problems, such as mental ret*rdation, lightly colored hair and skin, and lower IQ.
The disease phenylketonuria is an example of how
A.
a single gene can only affect a single trait.
B.
multiple genes can affect a single trait.
C.
a single gene can affect multiple traits.
D.
all of these
Answer:
C ..A single affect multi traits
Answer:
C ..A single affect multi traits
Explanation:
What keeps earths temperature suitable for life
Answer: The Earth has a suitable climate for the existence of all forms of life because of moderate amount of carbon dioxide, which is the driving factor for the survival of life forms. The temperature of planet Mercury ranges from 200°c below freezing to 375°c above. Hopes this helps. Can u pls pls pls mark me as brainliest
Explanation:
All the statements are true of herbivores except that they are
often prey
not producers
primary consumers
sometimes predators
The "Sometimes predators" one.
Herbivores are plant eaters so that don't eat meat.
They can be prey like a deer to a wolf.
They produce alright baby deer.
They do consume plants.
Answer:
The answer is "Sometimes preadators".
Explanation:
Hummingbirds drink nectar from flowers. Which beak shape would BEST help a hummingbird survive in a place where the flowers are shaped as shown in the picture?
THIS IS HISTORY BTW
Answer:
A
Explanation:
the beak is long and curved so the A beak would be perfect (give BRAINLEST please)
Answer:
The best answer would be A.
Explanation:
Answer A. is the best answer because the beak is longer and curved easier for drinking.
Were invertebrates more common? Did most organisms live on land or in the sea?
Answer:
Yes, invertebrates are common than vertebrates. Most organisms started off in the sea, then adapted to live on land.
Explanation:
In the past, the first animals were mostly invertebrates and lived in the water for a certain amount of time. Then, they developed the right body parts to be able to live on the land.
Answer:
invertebrates are animals with no backbone.
When S strain bacteria were killed by being heated to 60C, then mixed with live strain bacteria and injected into mice, a greater % of
mice died than when the strain bacteria were heated to 100C. Can you propose an explanation for these observations?
Answer:
Due to live strain bacteria.
Explanation:
The first method cause more damage to the mice as compared to the second method because in the first method the killed bacteria were mixed with the live strain bacteria. This live strain bacteria causes diseases in the mice and eventually killed the mice while on the other hand, all the bacteria were killed due to very high temperature so that's why first method causes more damage than second one.