Physical barriers of the immune system protect the body against pathogens by preventing their entry or flushing them out. The skin, mucous membranes, and reflexes like coughing and sneezing are important physical barriers.
Explanation:The physical barriers of the immune system protect the body against pathogens by preventing their entry or trapping and flushing them out of the body. The skin, which is tough, flexible, and waterproof, acts as a mechanical barrier. It contains tightly packed cells that are difficult for pathogens to penetrate. The mucous membranes in body openings like the nose and ears have hairs and cilia that trap pathogens and move them out of the body. In addition, the nose produces oil that helps prevent pathogen entry, and coughing and sneezing are reflexes that expel pathogens when they enter the mouth or nose, respectively.
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What’s the answer to this problem?
How fast are the plates still moving today?
A. 1 inch/year
B. 5 feet/year
C. 5 inches/year
D. 5 miles/year
Please answer I will mark brainliest!!!
Answer:
A
Explanation:
The movement of the plates creates three types of tectonic boundaries: convergent, where plates move into one another; divergent, where plates move apart; and transform, where plates move sideways in relation to each other. They move at a rate of one to two inches (three to five centimeters) per year.
How do insects help a plant to reproduce?
Answer: insects helps plants reproduction through pollution, which further leads to fertilization, flower and seed production.
Explanation:
Answer: Many flowering plants have separate male and female flowers. Therefore, they need help transferring the pollen from one flower to another, so they rely on pollinators to help with pollination. A pollinator is an animal, such as an insect or a bird, that transfers pollen from flower to flower. Plants have flowers that attract pollinators in many ways. They produce nectar that birds such as hummingbirds eat. They have bright colors, "nectar guides,” and patterns that look like bull’s-eyes to guide insects, such as bees, into the flower. Once the animal is inside the flower, it gets covered with sticky grains of pollen. As the animal moves from flower to flower, pollen brushes off onto the stigmas of other flowers. Fertilization can then occur to produce seeds.
Explanation:
using complete sentences, describe the uses for dams and reservoirs.What type of power do they generate
i really need help with this question!!!!!
Answer:
Uses of dams and reservoirs:
1) Dams and reservoirs are used to store water which flows through lakes and rivers.
2) It is used for the production of electricity by moving turbines with the flow of water.
3) It also helps in the control of flood.
4) Water that is stored in dams and reservoirs are used for irrigation of fields.
Dams generally generates power in the form of electricity.
Answer:
Dams and reservoirs are used to store water which flows through lakes and rivers.
It is used for the production of electricity by moving turbines with the flow of water.
It also helps in the control of flood.
Water that is stored in dams and reservoirs are used for irrigation of fields.
Explanation:
What body part has a joint that works in a manner simaler to a door
Answer:
The knee is like a door
Explanation:
Which of the following is most often associated with centripetal
acceleration?
O
A. A change in direction
O
B. Constant velocity
C. An increase in speed
O
D. A decrease in speed
Answer:
b
Explanation:
Segments of __________ transferred from parent to offspring are called genes
Answer:
DNA
Explanation:
how is it possible for a mutation not to have any significance
Answer: Silent mutation
Explanation: Silent mutation do not result in a change of amino acid. This is because some amino acids have more than one codon that code for them. For example a change from TTT to TTC will still result to leucine
What is the relationship between natural selection and adaptations?
Question 1 options:
Adaptations and natural selection are separate processes and not related
Natural selection occurs as a result of adaptations within a population
Natural selection is the process leading up to adaptations in a population
Natural selection and adaptations are actually the same thing
The relationship between natural selection and adaptations is natural selection is the process leading up to adaptations in a population.
What do you mean by natural selection and adaptations?The mechanism that makes it more likely that future generations will have advantageous traits is known as natural selection. The trait that adapts to the environment is called adaptation.
The possibility of regular choice is that characteristics that can be passed down permit creatures to adjust to the climate better than different organic entities of similar species.
Many finches perished because their smaller beaks were unable to crack the tough seeds. Through the course of regular determination, the birds that had the option to adjust replicated and flourished, while the others dwindled in number.
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Hey i need some help with this question.
Which statement describes a decomposer?
A. A giraffe eats the leaves off of trees, but does not kill the tree.
B. An aardvark kills and eats termites.
C. Fungus grows on a dead tree, slowly consuming the wood.
D. The roots of a maple tree grow under a sidewalk, slowly cracking and destroying the concrete.
Answer:
c
Explanation:
A fungus is a decomposer.
Bacteria on legumes are able to fix nitrogen from the air.
True or false?
Answer:
True
that is the answer bro
and also some bacteria are nitrogen-fixing bacteria like the azobacter etc
What is small a cell or an atom?
Answer:
Atoms or smaller than a cell
Explanation:
cells are bigger than atoms
Atom is a basic unit of things in the universe. Atoms consists of subatomic particles such as electron, proton and neutron. Hydrogen Atom, the smallest of all have a diameter of approximately 1.06 10^-10 m Cell is a basic unit of life.
The evolutionary perspective on mate selection claims that males and females differ in preferences of mate selection
primarily due to the
A hormone compositions of each gender
B. societal expectations and restrictions of each gender
C. difference in innate social capabilities
D. difference each gender displays in attraction cues
Answer:
B. societal expectations and restrictions of each gender
Explanation:
Just had this question on Edge and got it right :)
Which of the following is an example of a chemical change?
painting a house
bending steel baking soda in vinegar
freezing water
Answer:
Baking soda in vinegar
Explanation:
Cause soda is a base and vinegar an acid which will neutralise each other
Baking soda in vinegar is an example of a chemical change.
An example of a chemical change is baking soda in vinegar. When baking soda and vinegar are mixed together, a chemical reaction occurs, resulting in the production of carbon dioxide gas. This can be observed through the bubbling and fizzing that takes place.
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1. Into which two categories can the parts of every ecosystem be classified?
Answer:
Abiotic and Biotic
Explanation:
Biotic are living and Abiotic are non-living.
When new areas are being developed, nearby homeowners may notice an influx of displaced animals to their yards. How do these displaced animals disrupt the ecosystem of the residential yards?
Answer: The correct answer is: They compete with already present animals for sources of food.
Hope this helps! :)
Explanation:
As a car is slowed, most of its kinetic energy is converted by the brakes to:
O
potential energy.
O
electrical energy
O
thermal energy
O
chemical energy
When a car is slowed, the kinetic energy is primarily converted to thermal energy due to the friction between the brakes and the wheels. However, in hybrid vehicles, some of this energy can also be converted into electrical energy and stored in batteries.
Explanation:As a car is slowed, most of its kinetic energy is converted by the brakes to thermal energy. This occurs because the brakes use friction to reduce the car's speed, transforming the motion energy into heat energy. This is apparent when after a car is brought to a stop, the brakes can become very hot. This heat is a form of dissipated energy and is no longer available to do mechanical work, such as moving the car.
In the case of hybrid vehicles, this concept is further utilized, where the brakes convert mechanical energy into electrical energy, which is then stored in the battery.
Which of the following replicates prior to mitosis
Answer:
The S phase of a cell cycle occurs during interphase, before mitosis or meiosis, and is responsible for the synthesis or replication of DNA. In this way, the genetic material of a cell is doubled before it enters mitosis or meiosis, allowing there to be enough DNA to be split into daughter cells.
Explanation:
Final answer:
The correct order of mitosis stages is prophase, prometaphase, metaphase, anaphase, and telophase, crucial for ensuring accurate DNA replication and division into daughter cells. DNA replication occurs during the S phase of interphase, before mitosis.
Explanation:
The question inquires about the correct sequence of events during mitosis. Mitosis is a critical process of cell division that ensures the daughter cells receive an exact copy of the parent cell's DNA. The phases of mitosis progress as follows: prophase, prometaphase, metaphase, anaphase, and telophase, followed by cytokinesis. Observations reveal that DNA synthesis, a precursor to this process, occurs during interphase, ensuring that each daughter cell receives a complete set of chromosomes.
"Children, you ....
cross the street if the lights are red!"
should't
should
must
mustn't
Answer:
Mustn't.
Explanation:
Children in this picture are been labelled pedestrians, and it is totally wrong to use the zebra/white road crossing. This is because their are signs for pedestrians which is pedestrian crossing which is suggestive on when to move or halt totally.
In the other words, the red light means to halt totally while the amber means ready while the green signals move; but these all applies to auto operators or bike and motorcyclists. So the children mustn't cross until the pedestrian walk is signalled for movement on it.
Traffic light colors are of different types with their usual meaning.
Red light means the vehicles should stop while the pedestrian can move.
Greenlight means the vehicles should move while the pedestrian should stop. Yellow light means "ready to move"
According to the given question, we can say that "Children, you must cross the street if the lights are red!. Since red represents that the vehicles are not moving, hence the children are safe to cross the road.
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The moon does not have its own ___________.
Which term best completes the sentence?
A.gravity
B.light
C.revolution period
D.rotational period
Why does a population that experiences exponential growth have a high chance of having a population crash?
Please help I need to turn in my work By the end of the day
Answer:
The resources (food and water) needed for a species to survive may not be being produced at the same rate the population is growing. This could lead to starvation and death in the form of a population crash. Example: too many coyotes being born when there is not enough rabbits for them to eat.
what is Chromatid?
what is genome?
Answer:
Chromatids are the two different halves that compose the chromosome and contain the information that will later be translated into your genome.
Genome is all of the hereditary information that a human being carried.
aa. Aa. AA. Zebra mussels have the following genotypes and phenotypes. Which cross would produce the greatest number of heterozygous. A) AA x aa. B) Aa x Aa. C) AA x AA. D) as x Aa
Answer: A (AA x aa)
Explanation:
In option (A) both of the parent mussels are homozygotes, for alleles "a" and "A" respectively. Therefore, every single one (100%) of their offspring would be expected to be Aa heterozygotes. Combinations (B) and (D) yield a lower proportion of heterozygotes (50%), and combination (C) yields none at all. Punnett squares follow:
(A)
| A A
a | aA aA
a | aA aA
(B)
| A a
A | AA Aa
a | aA aa
(C)
| A A
A | AA AA
A | AA AA
(D)
| A a
a | aA aa
a | aA aa
Answer:
In option (A) both of the parent mussels are hom0ygotes, for alleles "a" and "A" respectively. Therefore, every single one (100%) of their offspring would be expected to be Aa heterozygotes. Combinations (B) and (D) yield a lower proportion of heterozygotes (50%), and combination (C) yields none at all. Punnett squares follow:
(A)
| A A
a | aA aA
a | aA aA
(B)
| A a
A | AA Aa
a | aA aa
(C)
| A A
A | AA
| A a
a | aA aa
a | aA aa
Explanation:
Help pls..... 14 to 18 :c
Answer:
15-c, 16-c, 17-roans, 18-c
Explanation:
!'m not sure why they are all c, but i believe they are all correct.
Why do sound waves move faster through the ground than through the air?
A.
Particles of matter are packed more loosely in the ground than in the air.
B.
Particles of matter are packed more tightly in the ground than in the air.
C. Air doesn't contain any particles of matter to transmit sound waves.
D. The elevation of the ground is lower than the elevation of the
Answer:
i believe its B
Explanation:
.Since in solids (such as packed earth) molecules are packed more closely together than in gases (such as air), the speed of sound waves should be faster in solids than in gases.
Answer:
B. Particles of matter are packed moe tightly in the ground than in the air.
Explanation:
The correct answer is
b. Particles of matter are packed more tightly in the ground than in the air.
Sound waves generally move faster in solids than liquids and gases. The reason is that sound waves are vibrations of the molecules of the medium: therefore, if the particles of the medium are closer together (as in solids), the vibrations can be transmitted faster, and the wave can travel faster. On the contrary, in gases the particles are spread apart, so the vibrations are not transmitted so easily (because there are less collisions between the particles) and the wave travels slower.
How can microorganisms affect us?
Answer:
They can invade our bodies and make us ill. They can cause infectious diseases like the flu or measles. Hope this helped and if it did then please mark brainliest. Have a nice day.
One strand of a DNA molecule has the sequence TTCGAGCAT. What is the sequence of the complementary strand of genetic material?
Answer: AAGCTCGTA
Explanation:
Which of the following may cause asthma?
Old food
Sleep
Stings
Tobacco smoke
Which of the following is a function of the kidneys?
O
A. To remove carbon dioxide from the blood and send it to the
urinary bladder
O
B. To catch toxins in the blood and send them to the liver
O
C. To catch nutrients that slipped away from the digestive system
O
D. To remove salts from the blood so osmosis works properly
option (a)
Explanation:
Kidneys remove waste products from the blood and produce urine
Which of the following are characteristics of Zygomycota? Check all that apply.
1.lack reproduction phase
2. spores produced in basidia
3.spores produced in zygosporangia
4.important in the food industry
5.important in the fermentation process
6.can cause disease to plants
7.can cause disease to animals
Answer:
the answer is 3 and 5
Explanation:
i took the assignment in e2020 ✔
The characteristics of Zygomycota are spores produced in zygosporangia and important in the fermentation process. Therefore, options 3 and 5 are correct.
What are Zygomycotas?The Phylum Zygomycota contains a relatively tiny group of zygomycetes, which are part of the fungus kingdom. One of these is the well-known Rhizopus stolonifer bread mold, which spreads quickly on the surfaces of bread, fruits, and vegetables. They primarily live on land, either in soil or on other plants and animals.
They reproduce by means of sexual reproduction through the formation of zygospores. They are used in the process of fermentation.
The characteristics of Zygomycota are spores produced in zygosporangia and important in the fermentation process. Therefore, options 3 and 5 are correct.
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