Answer:
Skin contains tightly packed cells.Skin is tough, flexible, and waterproof.You cough when a pathogen enters your mouth.You sneeze when a pathogen enters your nose.Explanation:
The physical barriers of the immune system prevent infections since they stop or expel any pathogen that enters the body. The skin with its cells tightly packed and characteristics, the endothelia, and mucous membrane, like the one in our nose, are physical barriers. They stop antigens from infecting our body since they can remove them by sneezing, coughing, or shedding.
Answer:
skin contains tightly packed cells
skin is tough, flexible, and waterproof
you cough when a pathogen enters your mouth
you sneeze when a pathogen enters your nose
Explanation:
PLEASE ANSWER ASAP I AM BEING TIMED!!!
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EXPLAIN THIS IS A WRITTEN ANSWER
Briefly explain why fossil fuels are good sources of fuel. In other words, where does the energy come from?
please I really need a help here ASAP. It's a physics question.
A space ship travels 3.00 ~ 10 km vertically to transport scientists from one particular station to
another. After the transportation, the captain decides to go hizontally 2.00 * 10km to visit an Orie
Calculate its:
a. Distance
b. Displacement
Answer:
a).Don't know if you meant to write 3x10^10km and 2x10^10km
I'll solve with this... If they aren't the values... You can then input the real values.
Distance = Total length traveled.
D= 3x10^10 + 2x10^10
D= 5x10^10Km
b) Displacement:
Since it went vertically... Then went horizontally in the second phase... It is forming a right angled Triangle and the Displacement would be the Hypotenuse of this triangle.
Disp.= √ (3x10^10)²+(2x10^10)²
Disp.=3.61x10^10km.
What is the major source of energy for the Earth?
here's your answer.. Option (C): the sun
(I really need this to boost my grade)
Label the permeable and impermeable rock layers
Answer: HI your question is incomplete but i will provide a general answer that can help you
answer : Permeable Rock layers allow the flow of fluid like substances through them, While Impermeable rock layers do not allow the flow of fluid like substance through them.
Explanation:
Permeable rocks are rocks containing pores through Fluid like substances can penetrate through in the rocks. examples of Permeable rocks are ; Sandstones and Chalk
While an Impermeable rock is a rock that does not allow the flow of fluid like substance through it due to the absence of pores in its rock layers . examples of such rock are ; Clay and marble
Although some permeable rocks might exhibit low level of permeability as well but generally Rock sample with pores are classified as permeable rock layers.
female male or other
Orange tree adaptation
Answer:
Blue tree adaptation...
WILL MARK BRAINLIEST!!!
Which of these is a benefit for a parent who sees a genetic counselor?
A. Deciding whether or not to take medications before pregnancy.
B. Being able to plan in advance for a genetic disorder in a child.
C. Knowing that society must make decisions about genetic disorders.
D. Having a source of long-term psychological help to live with a genetic disorder.
Answer:
B. Being able to plan in advance for a genetic disorder in a child.
Being able to plan in advance for a genetic disorder in a child is an advantage for a parent who sees a genetic counselor. So, the correct option is (B).
What is Genetic Disorder?A genetic disorder is a type of disease caused in whole or in part by a change in a DNA sequence away from the normal sequence.
It can be caused by several reasons like
1. Monogenic Disorder
It is caused by a mutation in one gene
2. Multifactorial Inheritance Disorder
It is caused by mutations in multiple genes
3. Combination of gene mutations and environmental factors.
4. Damage to chromosomes by the changes in the number or structure of entire chromosomes, the structures that carry genes.
Genetic counseling helps parents for better understand test results and treatment options, helps deal with emotional concerns, and provides referrals to other healthcare providers and advocacy and support groups.
Thus, being able to plan in advance for a genetic disorder in a child is an advantage for a parent who sees a genetic counselor. So, the correct option is (B).
Learn more about Genetic Disorders, here:
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Why does climate change occur?
Explain your answer.''
Answer:
Human activity is the main cause of climate change. People burn fossil fuels and convert land from forests to agriculture. Since the beginning of the Industrial Revolution, people have burned more and more fossil fuels and changed vast areas of land from forests to farmland.
Explanation:
What are the answers for both of the questions
What are two things we need to consider to make living off Earth possible?
g Explain the meaning of ploidy (haploid, diploid, aneuploid etc.) and how it relates to the number of homologues of each chromosome
Answer:
The correct answer is - Ploidy is the number of sets of chromosomes in a biological cell.
Explanation:
Ploidy is the number of sets of the chromosome in a living cell. Ploidy is known for different condition such as haploid, diploid, and aneuploid, and many more depends how many homologues chromosome numbers are present in the cell.
Diploid cells are common in many organisms where one chromosome come from the mother gamete and the other from the father gamete and makes the homologues chromosomes. In diploid homologues, chromosome are 2n where n is the number of homologues of each chromosome.
In haploid there is only one set of each chromosome and mainly takes place by meiosis. In aneuploidy is the condition where the number of homologues chromosomes are not as the normal genome of the organism for example in humans instead of 46 chromosomes there 45 or 47 chromosome found.
Explain why fish would not be able to navigate their surroundings nearly as well if the light-absorbing molecules in their eyes were an order of magnitude larger or smaller than retinal.
Answer:
Fishes use a different vision mechanism than mammals and other land animals. They have rods and cone photoreceptors to see the colorful visions and adjust their focal point by moving the lens closer to or away from their retina.
In the water bodies, a difference in the amount of light moves with the depth because water absorbs the light and this change occurs due to the optical nature of water.
The light bounces once it back in the retina, leads to the gain of the small packets of energy of light a second chance to be trapped by photoreceptors. However, vision remains blurry. The changes and distortion of the light-absorbing molecules present in the eyes of fishes make it tough to perceive a clear vision.
What is the answer to number 1
Answer:
TTT GGC AGT
Explanation:
Advantages and disadvantages of physical barriers in the immune system
Explanation:
advantages:Physical barriers play an important role in preventing microbes from reaching tissues that are susceptible to infection. At the cellular level, barriers consist of cells that are tightly joined to prevent invaders from crossing through to deeper tissue.
Physical barriers play an important role in preventing microbes from reaching tissues that are susceptible to infection. At the cellular level, barriers consist of cells that are tightly joined to prevent invaders from crossing through to deeper tissue.
What is immune system?Immune system is a large network of organs, white blood cells, proteins (antibodies) and chemicals. This system works together to protect you from foreign invaders (bacteria, viruses, parasites, and fungi) that cause infection, illness and disease.
Disadvantages of physical barriers in the immune system is causing immuno deficiency disease.
For more information regarding immune system, visit:
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Dominant traits are...
A.Traits that everyone wants
B. Traits that are shown over traits
C.Traits that are hidden by other traits
D. Trants that no one wants
Answer:
its b
Explanation:
Answer:
It would be C , for Pluto
Explanation:
BEST ANSWER GETS BRAINLIEST!!!!!!1
A polygraph test is conducted, and the findings indicate that there is an 80 percent chance of deception. What does this mean for the investigation?
The suspect is guilty and should be arrested for the crime.
The suspect is probably just nervous since 80 percent is a pretty high number and usually indicates a false positive.
The suspect might be guilty, but more information is needed from other parts of the investigation.
There has been a mistake in the polygraph test, and the test should be conducted again to get better results.
Answer:
The suspect might be guilty, but more information is needed from other parts of the investigation.
Explanation:
Due process states innocent until proven guilty. Having an 80 percent chance of deception is not solid proof of anything. It does, however, bring more speculation to the table that this person is indeed guilty, but because there is no actual proof, the investigators must find more information on the matter.
WILL MARK BRAINLIEST!
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Which best describes salts?
a. organic substances
b. inorganic substances
c. made of carbohydrates
d. made of lipids
(15 pts)
(its really environmental science but thats not a subject on here so sorry ;-;)
Answer:
inorganic substances
Explanation:
There are both organic and inorganic salts. However, salts like table salt (sodium chloride), baking soda (sodium chloride), calcium carbonate, and muriatic acid (industrial-grade hydrochloric acid) are some of the commonly known inorganic compounds. So, to highlight it, table salt or food salt that humans consume are inorganic compounds.
True or False; Carbohydrates and Lipids are organic, contain CHO and are both forms of energy.
What is microbiology about?
Answer:
Microbiology is the study of all living organisms that are too small to be visible with the naked eye. This includes bacteria, archaea, viruses, fungi, prions, protozoa and algae, collectively known as 'microbes'.
Explanation:
it right here -w-
Homeostasis is maintained through feedback mechanisms.
a. True
b. False
Answer:
a. True
Explanation:
An endocrine system refers to a series of ductless glands and organs responsible for the production and secretion of hormones that are used by the body for the performance of various functions such as metabolism, controlling growth, reproduction, mood, sleep, etc. These hormones are secreted directly into the circulatory system (blood) and then transported to the organs and tissues in the body.
Basically, the endocrine system contributes significantly to the state of homeostasis in the body.
Homeostasis can be defined as a process through which a living organism maintains a steady or stable physical, internal and chemical environment that is ideal to enhance life and proper functionality.
Homeostasis is maintained through feedback mechanisms, which are either positive or negative feedback.
During a negative feedback, a sensor and a control center in the body of a living organism maintains blood glucose to regulate blood pressure by releasing glucagon to increase blood sugar or releasing insulin to decrease blood sugar.
For a positive feedback, a sensor and a control center aids child birth by causing the uterine to contract.
BRAINLIEST
CAN SOMEONE PLZ HELP ME!!
Explanation:
I’m pretty sure it’s phenotypes
Please do not answer if you don't know this is a final I really need to pass 
Joe and Sam were adopted as infants into different families. They have just met and noticed how much they look alike. They are also the same age and suspect that they are twins who were separated at birth. They wish to know the truth, so have their DNA analyzed. Study this DNA fingerprint (RFLP method) and write a short essay that answers the following questions:
a. In the last column of the DNA fingerprint, what does "frequency of occurrence" mean?
b. What is the probability that Joe and Sam are not twins (i.e., that the DNA in the fingerprints could have come from unrelated men)?
Answer:
Explanation:
The missing diagram in the question is attached in the image below.
(A)
From the image below, the frequency of occurrence is shown in the last column.
The frequency of occurrence means the particular band for the entire whole population.
As an example:
1 in 15 frequency of occurrence means; ⇒ One (1) out of every fifteen (15) people has the band.
1 in 450 frequency of occurrence means; ⇒ One (1) out of every 450 people has the band.
(B)
However, Let the probability that Joe and Sam are twins be = A
and the probability that they are not twins be denoted with B;
Then;
P(B) = 1 - P(A)
where;
P(A) = Probability of specific bands appearing on the gel in every one of them
[tex]P(A) =\Big( \dfrac{1}{15}\times \dfrac{1}{15}\Big)\times \Big( \dfrac{1}{450}\times \dfrac{1}{450}\Big)\times \Big( \dfrac{1}{32}\times \dfrac{1}{32}\Big)\times \Big( \dfrac{1}{70}\times \dfrac{1}{70}\Big)[/tex]
[tex]P(A) =\Big( \dfrac{1}{225}\Big)\times \Big( \dfrac{1}{202500}\Big)\times \Big( \dfrac{1}{1024}\Big)\times \Big( \dfrac{1}{4900}\Big)[/tex]
P(A) = 4.37 × 10⁻¹⁵
∴
P(B) = 1 - P(A)
P(B) = 1 - 4.37 × 10⁻¹⁵
P(B) ≅ 1
Rheumatoid arthritis is commonly associated with the presence of rheumatoid factor autoantibodies in the bloodstream. This indicates that rheumatoid arthritis is likely to be a. an infective process. b. caused by bacterial infection. c. an autoimmune process. d. because of an enzymatic defect.
Answer:
The correct answer is - c. an autoimmune process
Explanation:
Rheumatoid arthritis is a disease or condition that affects the joints mainly by swollen, and painful joints. It is an autoimmune disease as the person's own immune system attacks the body.
The presence of rheumatoid factor autoantibodies states that it is an autoimmune process. There are other autoantibodies also associated with this type of arthritis that are rheumatoid factors (RF), anti‐keratin antibodies (AKA), anti‐filaggrin antibodies (AFA), and anti‐perinuclear factor (APF).
A fruit fly of genotype B R/b r is testcrossed with b r/b r. In 84 percent of the meioses, there are no chiasmata between the linked genes; in 16 percent of the meioses, there is one chiasma between the genes. What proportion of the progeny will be B r/b r
Answer:
4 percent (4%)
Explanation:
A single crossover occurs between two (non-sister) chromatids belonging to homologous chromosomes. In this case, 16 percent of the meioses have a single crossover, thereby it will produce 8 percent of the chromosomes with the original (parental) combination in the progeny and the remaining 8 percent should be recombinants. From this result, it is reasonable to conclude that half of these recombinants should be 'Br' (and the other remaining 4 percent should be recombinants 'bR'), and therefore the answer is 4 percent (4%).
Plz someone help. This is due tonight!!!! I will give brainiest if you fill it out and NO LINK!!
Answer: I am not sure i will try to figure out
Explanation:
If the amount of food or resources available increases, the carrying capacity of the animal would ?
Answer: Increase
Explanation:
the soil will move farther when you pour water_________
gradually or rapidly
Answer:
The soil will move farther when you pour water gradually.
pls help!! ill give brainlest !!
Answer:
meiosis
Explanation:
meiosis occurs first in the sex gametes while mitosis occurs later in growing cell
Scientists observed that the populations of top-level consumers in a particular ecosystem were rapidly decreasing. Further studies revealed that there was also a decline in producer productivity. Which other changes did the scientists most likely observe in the ecosystem?
increased producer diversity
decreased population size at all levels
decreased primary consumer populations only
increased primary and secondary consumer diversity
Answer:
The correct answer is - decreased population size at all levels.
Explanation:
A decrease in the productivity of producers of an ecosystem will lead to a decrease in all other organisms of the ecosystem including top-level consumers to the bottom-level producers due to the fact that producers provide energy and food to primary consumers.
It is because they are the only organisms that convert the sunlight to usable energy and food that transfer from one trophic level to other, so if the population of producers or their productivity will decrease then there will be decreased population size at all levels.