Answer:
21 chromosomes
Explanation:
Somatic cells are a diploid which have 2 sets of chromosomes. If two sets are 42 chromosomes, one set must be 21 chromosomes. Gametes are a haploid which have only 1 set of chromosomes. So in each gamete, there should be 21 chromosomes.
A disease-causing bacteria successfully enters your body, making it past the first and second lines of defense. Which barrier will then act on the bacteria? chemical physical biological electrical.
Answer:
The correct answer is biological.
Explanation:
When any pathogen invades the body, it has to pass several lines of defence. The first barrier is the skin and mucous membrane which is a physical and chemical barrier. The second line of defence is the non-specific response by macrophages, neutrophils and interferon. After crossing these two barriers the third line of defence comes into action in which, the B- cells and T-cells act specifically on the pathogen and destroy it.
Answer:
[tex]\huge\boxed{\sf Biological}[/tex]
Explanation:
When first and second line of defense is passed by the bacteria, the third line of defense will come into action which is a biological barrier which includes antigen which are anti-bodies generating substances.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807What's a recycling plant and how are electromagnets used there?
Answer:
A recycling plant is a factory for processing used or abandoned materials. The different types of recycling plants include those that process glass, metals, and paper back into raw materials. Other plants focus on items that require complicated recycling processes, such as concrete, electronic equipment and various plastics.
Electromagnets are used to lift and manoeuvre the crushed up ferrous materials or again to extract them from a pile of scrap. Ferrous materials are heavy and sharp but with the strength of the electromagnets they can be lifted and moved around with ease.
Hope that helped. x
what are 3 structures(organelles) that plant cells that animal cells do not?
why,we have more mitochondrial in our tissue muscles? -sorry for bad eng
Answer:
This is because mitochondria produce ATP during aerobic respiration and ATP is needed for muscle to contract. ... Muscles cells contain more mitochondria because they have to release large amount of energy quickly for movement.
Explanation:
Hope it's help
A student is investigating the process of osmosis. She fills a medicine dropper with red
blood cells. Next, she creates a saline solution that is isotonic to the red blood cells.What will most likely happen to the red blood cells after they are placed in the
solution?
A. Water will exit the cells and cause them to shrink in size.
B. Water will enter the cells and cause them to grow in size.
C. Water will neither enter or exit the cells and their sizes will remain the same.
D. Water will enter and exit the cells at a steady rate and their sizes will remain
the same.
Answer: D. Water will enter and exit the cells at a steady rate and their sizes will remain the same.
Explanation:
Osmosis occurs when the salt content is NOT the same as our red blood cells: the salt or lack of it causes our RBCs to swell or shrink. Isotonic fluid has the same salt content as our RBCs. This is why it's important to watch salt intake in congestive heart failure.
Answer the following for 20 points ……….
Why is air temperature above land warmer than the air temperature above water in the same location during the summer?
Answer:
Sea breezes happen during the hot, summer days due t the unequal heating rate of land and water
Explanation:
Solar heating of the Earth’s surface is uneven because land heats faster than water, and this causes air to warm, expand and rise over land while it cools and sinks over the cooler water surfaces.
hope it is useful
a particular peach tree produces peaches that are more resistant to disease than other peaches. what method would reproduce these exact peaches?
The best way to get the exact preach tree is through Asexual reproduction.
Asexual reproduction is the only method of reproduction in which the exact copies of genes in the parents are transferred to the offspring. If cross pollinations( Sexual reproduction') with the a peaches plants from a different parents plants takes place, genetic variation at meiosis will not permit the inheritance of the exact copies of genes for diseases resistance.
Therefore, it is ideal in this scenario to by pass crossing over and recombination at meiosis, in order get the exact copes of genes for disease resistance through mitosis in the offspring, asexual preproduction is used.
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The method that would produce peaches of exactly the same characteristics would be cloning or vegetative propagation.
Cloning the peaches that are more resistant to disease will result in the production of peaches with exactly the same morphological and genetic attributes.
The same result would be obtained by propagating the desired peaches asexually using relevant means.
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Which of the following describes the changes that occur during the 3rd week of the menstruation cycle? A. The egg matures within the ovary. B. The egg travels through the fallopian tube to the uterus. C. The unfertilized egg is removed from the uterus. D. Egg travels from the ovary into the fallopian tube. Please select the best answer from the choices provided. A B C D.
The changes that occur during the 3rd week of the menstruation cycle is
the egg travels through the fallopian tube to the uterus.
Ovulation is the process that takes place during the 3rd week of
menstruation. The Luteinizing hormone (LH) stimulates the release of the
egg from the ovary and travels through the fallopian tube to the uterus.
At this stage, the individual has a higher chance of getting pregnant when
unprotected sex occurs.
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if a man with type ab blood marries a woman with type o blood, what blood types would you expect in their children
Answer: the child could be A or B blood type
what is the main product or purpose of photosynthesis?
Answer:
Plants are autotrophs, which means they produce their own food. They use the process of photosynthesis to transform water, sunlight, and carbon dioxide into oxygen, and simple sugars that the plant uses as fuel. These primary producers form the base of an ecosystem and fuel the next trophic levels.
Hope that helps. x
The abundance of sodium leak channels in skeletal muscle is ______ the abundance of sodium leak channels in a typical neuron.
The abundance of sodium channels in muscles is as important as the abundance of sodium leak channels in a typical neuron.
Sodium plays an essential role in the body, this includes important functions such as:
Intervening in the process of muscular contraction.Intervening in the process of interneural communication.This is possible through sodium channels in cells that allow sodium to enter or leave the cell at very specific times and this causes specific reactions in cells.
In neurons: Sodium channels are abundant and essential because due to the action of sodium signals are passed from one neuron to others.In muscles: Sodium channels are abundant and essential, especially in skeletal muscles. The role is sodium is to contract or relax muscles, which makes movement possible.Based on this, the presence of these channels in both neurons and skeletal muscles is equally important.
Learn more about sodium in: https://brainly.com/question/8507057
Which type of bond, denoted by the arrows, allows DNA to be readily replicated?
Need for a final will mark brainliest!
Answer:
the answer would be hydrogen bonds as another chemical will come down the center of the double helix and break the hydrogen bonds allowing DNA synthase II to come along a replicate it.
5. What would happen if all of the bird types in this activity flew to an island where no birds had
been before and the only food available was rice? Which birds would be most successful? Which
birds would be least successful?
Answer:
the birds would either have two choices. they can eithe starve or they could adapt and eat the rice. they eventually would adapt if they wanted to stay alive and thrive or they would simply become extinct
Explanation:
If all of the bird types in this activity flew to an island where no birds had been before and the only food available was rice then they either starve or adapt and eat the rice.
What is adaptation?An adaptation can be defined as the heritable behavioral, morphological, or physiological trait which has evolved through the process of natural selection of a species, and maintains or increases the fitness of an organism of a species under a given set of environmental conditions and time.
In this activity, if all of the bird types flew to an island where no birds had been before and the only food available was rice then they either starve or they could adapt and eat the rice. However, they eventually would adapt if they wanted to stay alive on that island and thrive or they would simply become extinct.
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Which spheres include the water cycle? (Select all that apply.)
hydrosphere
geosphere
biosphere
atmosphere
All of them include the water cycle
The species that plays the biggest role in the habitat is?
Answer:
A keystone species is a species that plays an essential role in the structure, functioning or productivity of a habitat or ecosystem at a defined level (habitat, soil, seed dispersal, etc)
Answer:
the one that does the most damage, both to its habitat and the population of species around them.
Explanation:
Which three terms could be used to identify the carbon (c) in this chemical equation
Answer:
element product atom
Explanation:
If a cell that is about to divide has 22 chromosomes how many chromatids does it have? How many centromeres does it have?
44 chromatids 2 centromeres, If a cell that is about to divide has 22 chromosomes.
What are chromosomes?In the synthesis phase, the number of chromatids doubles while the number of chromosomes remains constant. Although the number of chromatids is unaffected, anaphase doubles the number of chromosomes.
Depending on whether or not the DNA has replicated and when the sister chromatids split, the chromosome changes during the cell cycle.
Meiosis I and Meiosis II are the two division cycles that occur during a meiotic cell division. Since the genetic material duplicates during the S phase of meiosis I, there will be 2n chromosomes during metaphase I.
Therefore, if a cell that is about to divide has 22 chromosomes it have 44 chromatids and 2 centromeres.
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Explain how the number of electrons in a energy level affects bond formation
The electron transport process makes water and ATP and is sometimes called
because it requires oxygen.
Answer:
respiratory chain... hope that's right
Check the statements below that provide evidence for the endosymbiosis theory
The DNA in the nucleus and mitochondria are the same.
This is not exactly true, although they are similar. This is not a correct option.
The following three are correct options:
Mitochondria and chloroplasts grow independently from the cell.
This is true, and supports the idea that they previously existed as their own organisms.
Prokaryotic cells, mitochondria, and chloroplasts are all the same size.
All three organisms/organelles are roughly the same size, which supports the idea that chloroplasts and mitochondria are descendants or prokaryotes.
Mitochondria and chloroplasts contain their own ribosomes.This is true as well.
When autotrophs produce more organic matter than they use in respiration tehre is anet increase in organic matter. That is called
A. Anaerobic repiration.
B. Diffussion.
C. Primary production.
D. Osmoregulation.
Answer: Primary Production
Explanation:
A net increase in organic matter seen when autotrophs produce more organic matter than they use for respiration, The hint was autotroph, an autotroph is always a primary producer, so there for it would be primary production.
Why are zebra mussels able to spread so quickly in the United States?
a. They are weaker competitors than the local mussels.
b. They grow logistically.
C. They are more zebra mussels than there are resources.
d. There are no natural predators of the zebra mussel in the U.S.
5. What enzyme makes it less likely that DNA will be lost from telomeres during replication?
Answer:
Telomearse
Explanation:
In what layer of the atmosphere is weather occuring and the layer where we live?
Answer:
Atmosphere takes place in the stratosphere and we live in troposphere
Ten year old Matt Zigbowski struggles at school. His teacher seats students alphabetically, so he is at the back of the classroom. He cannot see the words on the chalkboard from his desk. When he goes to the teacher's desk near the chalkboard, he can see the words. What is probably wrong with his eyes?
a. hyperopia
b. myopia
c. astigmatism
d. astigmatism and myopia
e. astigmatism and hyperopia
Answer:
Ten year old Matt Zigbowski struggles at school. His teacher seats students alphabetically, so he is at the back of the classroom. He cannot see the words on the chalkboard from his desk. When he goes to the teacher's desk near the chalkboard, he can see the words. What is probably wrong with his eyes? D. ASTIGMATISM AND MYOPIA
what bonds in an atp molecule store the chemical energy used by cells?
Answer:
quais ligações em uma molécula atp armazenam a energia química usada pelas células?
Explanation:
espero ter ajudado boa noite
__________________________bacteria survive in the harsh environment of the stomach because it is able to neutralize the gastric acids and live in the mucosal stomach lining, safe from the host's immune responses.
Answer:
Archaebacteria
Explanation:
It is the only bacteria able to survive harsh environments.
(P.S. why did you delete my 1st response?)
A peacock spreading its tail to attract a mate is sending a(n) _____ stimulus. learned innate external internal
Answer:
External
Explanation:
The Tail is spreading outside of the peacock (Externally)
what process can lead to an individual having too many or two few chromosomes?
The process which can lead to an individual having too many or two few
chromosome is as a result of mutation which occurs during meiosis.
Meiosis is the type of cell division which occurs in reproduction and the
production of sex cells such as sperm and egg. This process results in the
production of four unique daughter cells.
The homologous chromosomes not being properly distributed in the
process could lead to such types of error.
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