Answer:
This is because our chromosomes exist in matching pairs – with one chromosome of each pair being inherited from each biological parent. Every cell in the human body contains 23 pairs of such chromosomes; our diploid number is therefore 46, our 'haploid' number 23.
Explanation:
Humans have 23 pairs of chromosomes because 23 chromosomes come from the father and the other 23 come from the mother, and thus humans end up with 46 chromosomes. With 23 sets, you have two copies of each gene. This is what happens in normal situations. However, in some cases during cell division, there could be more or less that 46 chromosomes.
One set of 23 chromosomes is inherited from the biological mother (from the egg), and the other set is inherited from the biological father (from the sperm). Of the 23 pairs of chromosomes, the first 22 pairs are called "autosomes." The final pair is called the "sex chromosomes."
In a normal diploid cell, there are 24 *different* chromosomes out the total of 46: there are 22 pairs of identical autosomes and 2 non-identical sex chromosomes.
Hope this helps!
Un niño que ha enfermado de paperas o varicela, no desarrollará estas
enfermedades en una segunda oportunidad, porque:
I. la piel, mucosas y lágrimas impiden el ingreso de los microbios.
II. en el primer contacto adquirió anticuerpos.
III. interviene la inmunidad Adaptativa, la cual presenta "memoria".
IV. su sistema defensivo está preparado frente a una segunda exposición
a. I y II son correctas
b. III y IV son correctas
c. II, III y IV son correctas
d. I, II y III son correctas.
Respuesta:
La respuesta correcta es la C, ya que II, III y IV son correctas.
Explicación:
Nuestro sistema inmunológico nos defiende de agentes patógenos que pueden enfermarnos, y está compuesto por dos tipos distintos de inmunidades: la inmunidad innata y la inmunidad adaptativa.
La inmunidad innata es aquella que reacciona primero cuando se presenta una amenaza, atacando a los patógenos de manera inespecífica gracias a mecanismos que ya existían antes de que se desarrolle la infección. Cuando se trata de inmunidad innata, nuestras principales barreras de defensa son la piel y las mucosas, y las células de la respuesta inmune de mayor relevancia son los neutrófilos, entre otras.
Por el contrario, la inmunidad adaptativa, es de respuesta tardía y puede actuar de maneras diferentes dependiendo de cuál sea el patógeno invasor. Hay dos tipos de inmunidad adaptativa, la humoral y la celular. De la inmunidad humoral participan principalmente los linfocitos B, que fabrican anticuerpos específicos; mientras que la inmunidad celular es llevada a cabo por linfocitos T. La ventaja que tiene la inmunidad adaptativa en comparación con la innata es que es específica, diversa, más eficaz, y POSEE MEMORIA.
Las células de la inmunidad adaptativa presentan la capacidad de "recordar" cómo el cuerpo actuó ante una amenaza en el pasado para poder llevar a cabo un plan mucho más eficaz. Esta es la razón por la que las vacunas funcionan: porque se le inyecta a los individuos una versión débil del patógeno (por ejemplo, del virus que causa la varicela) para que el cuerpo "aprenda" a vencerlo para cuando se encuentre con ese microorganismo en un futuro.
Choose one of the animals listed on the page, and write a brief description of its characteristics. Be sure to discuss any ways
the animal has adapted to its environment. (Site 1)
Answer:
The Horned Viper has two little horns on its head thats why its called The Horned Viper. The Horned Viper is a snake that has venom in its bite that can kill humans. The snake can grow to about two feet long. The Horned Viper likes to blend in with the sand all around it. The snake burrows into the sand and waits for birds, lizards, and small mammals to eat.
Explanation:
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Describe what occurs as epidermal cells move away from the dermis.
Answer:
Your skin blisters, and a clear liquid fills the bubble
Explanation:
Why are bananas curved?
Answer:
Bananas are curved since they grow towards the sun!
Answer:
Because thyy grow by the sun.. or something like that..
Explanation:
How many moons does Saturn have?
O A.
OB. 1
O c. 4
O D. More than 50
Answer:
D
Explanation:
Saturn has 82 moons.
Answer:
D
Explanation:
How many moons does Saturn have? A total of 82 confirmed moons, surpassing even Jupiter, which has 79. There could be even more hidden moons that orbit around Saturn, and as such, this gas giant will be from now on not only recognized for its prominent rings but also its numerous moons.
1. Which of the following is NOT a major source of freshwater pollution?
A. Human and animal wastes
B. Industrial wastes
C. Wetlands
D. Agricultural chemical
in
2. Pesticides are most likely to be found in runoff from
B. Roads
C. Farm fields
D. Homes
E. Factories
3. What is an estuary?
A. A coastal inlet where fresh and salt water meet.
B. A tropical grassland
C. A river that flows into a larger river
D. A landform with high elevation and high relief.
Hi can y’all help me answer does just started 6th grade .. I will give you brainlest plz help
Pollution may be defined as any form of unwanted substances or impurities which are present in the atmosphere of the earth that harm the lives of living entities.
Human and animal wastes, industrial wastes, and agricultural chemicals are potent sources of freshwater pollution.
Pesticides are generally spread in the agricultural fields to protect the crop from pathogens and are most likely to be found in runoff from farm fields during the rainy season.
An Estuary is a mini-ecosystem in which freshwater meets the marine water near the sea.
Therefore, it is well described above.
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How is static electricity created?
a. Two objects that are both positively charged repel each other and release
electric energy.
b. Two objects that are both negatively charged become attracted and create a
spark.
c.
Two highly conductive materials are placed within close proximity of one
another.
d. Friction between two objects causes a transfer of electrons from one object to
the other.
.
Answer:
d
Explanation:
So, when a person or any object has extra electrons, it creates a negative charge. These electrons thus get attracted to positive electrons (as opposite attracts) of another object or person and vice versa. The shock that we feel sometimes is the result of the quick movement of these electrons.
The rubbing of certain materials against one another can transfer negative charges, or electrons. For example, if you rub your shoe on the carpet, your body collects extra electrons.
Answer:
d. Friction between two objects causes a transfer of electrons from one object to the other.
Explanation:
If electrons are transferred by rubbing two objects together, the result of the friction is that one object becomes positively charged by losing electrons, and the other object becomes negatively charged by gaining them. This is known as static electricity.
What type of bond is being formed in this polymerization reaction to link two amino acids together?
Will award 80 points
Gametes contain ______ copy/copies of each gene.
Two
Four
One
Thee
Answer:
one
There may be many possible alleles for any gene, but a diploid cell or animal contains only two alleles of each gene or two copies of a single allele; a haploid gamete contains one copy of each gene, so only one allele.
An experiment is conducted to determine the effects of energy drinks on an individual’s heart rate groups A and B have matched for all factors such as age and sex.Each person in group A is given two red bull energy drinks for breakfast and lunch and then the heart rate is measured.Each person in group B is given water to drink with breakfast and lunch and then their heart rate is measured.Both groups are Fed the same breakfast and lunch the results are recorded
Answer:
Explanation: this is complicated
Mitochondria replicate themselves and even contain a small amount of
Answer:
I think it's a small amount of ATP
Which word best describes the hot, weak, inner part of the upper mantle, which can flow?
lithosphere
asthenosphere
crust
core
Answer:
asthenosphere
Explanation:
Nucleotide are composed of phosphate group, a sugar , and a nitrogenous base. DNA is made up of long strands of nucleotide. which part if the above molecule can differ between nucleotide?
A- The Sugar
B- The Phosphate Group
C- The Nitrogenous Base
D- The Sugar and Phosphate Group
Answer:
C
Explanation:
The nitrogenous base can change
i am horrible at science. please help
breathing more deeply and frequently
Since diffusion is the primary method one celled organisms use for material transport, the ratio of____________ is an important factor for them
Answer:
uffff..... that's a tough one
Two differences between hormones and the nervous system
Answer:
Hormones can be proteins, lipids or cholesterol-based molecules. Neurotransmitters are protein. The main difference between hormones and neurotransmitters is that Hormones are produced in the endocrine glands and released into the bloodstream where they find their movement targets at a distance from their origin. In contrast, Neurotransmitters are released into the synaptic space by a terminal of an excited presynaptic nerve cell and transmit a nerve signal to the neighboring postsynaptic nerve cell.
Explanation:
Answer:
the nervous system and endocrine system (hormones) is that the nervous system uses electrical impulses to send messages through neurons while endocrine glands use hormones to send messages to the target cells through the bloodstream.
i'll give you brainliest if you put this in your own words
The pressure on the inner core makes the inner core into a solid state, the temperature is hotter that the outer core but it's not hot enough to melt a substance do to the pressure squeezing down from all the layers above!
Answer:
The pressure on the inner core puts the inner core into a solid state, therefore the temperature is hotter than the outer core, but not enough to melt a substance due to the pressure squeezing down from the other layers above.
Explanation:
Which tectonic plate boundary caused the structure that is circled in the image?
Answer:
I'm guesssing it's B? I did this a very long time ago( two weeks ago)
Explanation:
Most divergent plate boundaries are underwater and form submarine mountain ranges called oceanic spreading ridges. While the process of forming these mountain ranges is volcanic, volcanoes and earthquakes along oceanic spreading ridges are not as violent as they are at convergent plate boundaries.
A teacher performing a demonstration finds that a piece of cork displaces 24 mL of water. The piece of cork has a mass of 6 g. What is the density of the cork?
Answer:
0.25 g/cm³
Explanation:
Density is the ratio of mass to volume:
(6 g)/(24 mL) = 0.25 g/mL = 0.25 g/cm³
_____
1 mL = 1 cm³. Units of density in the cgs unit system are g/cm³.
Living cells are classed as either prokaryotic or eukaryotic. Which of the following characteristic(s) identify eukaryotic cells? Select all that apply.
are produced by division of another cell
comprise most multi-celled organisms
contain DNA
have a nucleus
have membrane-bound organelles
mostly single-celled organisms
contain cytoplasm
are the smallest unit of living matter
Answer:
have nucleus have membrane bound organelles have cytoplasm contain DNA
Use the paragraph to answer the question. A team of biologists has been investigating fireflies to determine the cause of their declining population. Habitat loss is the most likely factor in the decline of the bioluminescent bug. Light pollution also plays a role. Excessive light disrupts the insect’s mating ritual. Write one to two sentences giving an example of technical language in this paragraph and explaining how it affects the overall meaning of the paragraph. (2 points)
Explanation:
Biologists have discovered that the reason behind the decline of fireflies is habitat loss, light pollution and excessive light; excessive light can disrupt the insects mating ritual.
1. which of the following is a function of the nucleus?
stores DNA
stores sugars
builds proteins
packages proteins
2. which of the following statements about the nucleus is not true?
the nucleus stores the coded instructions for making the cell's proteins.
the nucleus usually contains a nucleolus region which where ribosome assembly begins.
the nucleus is the site of protein assembly.
the nucleus is surrounded by a nuclear envelope that lets materials in and out.
3. which organelle breaks down organelles that are no longer useful?
Golgi apparatus
lysosome
endoplasmic reticulum
mitochondrion
4. which of the following is a function of the cytoskeleton?
helps a cell keep its shape
contains DNA
surrounds the cell
helps make proteins
5. which of the following is a function of vacuoles in an animal cell?
convert energy
make proteins
store materials
break down molecules
pls help me! <3 :)
Answer:
1. Stores DNA
2. The nucleus is NOT the site of protein Assembly
3. Lysosome
4. Helps a cell keep its shape
5. Lysosomes store materials
Explanation:
Which structures are found in both prokaryotic and eukaryotic cells?
Cell membrane and cytoplasm/ cytosol
Cell membrane and nucleus
Cytosol/ cytoplasm and chloroplasts
Nucleus and mitochondria
Answer:
cell membrane and cytoplasm/cytosol
Explanation:
are there more tissues or more organs in your body? explain your reasoning.
Answer:
More tissues.
Explanation:
Each organ is made up of several different types of tissue. Therefore, for every organ in the body, there are many more tissues.
What does the sodium-potassium pump keep at a high concentration outside of the cell?
A. potassium
B. sodium
Answer:
B. sodium
Explanation:
2 potassium ions are moved inside the cell and 3 sodium ions are moved out. So there is more sodium on the outside of the cell.
3. How does oxygen cross into the cell?
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
The oxygen cross into the cell as water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion has been one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
What is osmosis?
Osmosis has been the process in which molecules of the solvent pass via a semipermeable membrane from a lower concentrations to higher concentration or from less concentrated solution to high concentrated solution. In the process of the osmosis movement of the water takes place.
There are mainly three types of the osmosis and these are hypertonic, hypotonic, and isotonic. The process of osmosis has been passive transport as water moves from low solute concentration to high solute concentration.
Osmosis has been also known as diffusion of water or solvent via a membrane which allows only selective substance to go across the channel. The process of osmosis does not require ATP because it is a passive process.
Therefore, The oxygen cross into the cell as water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion has been one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
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What are seven easily observable characteristics of all living things
Answer:
Explanation:
-Responsiveness to the environment - The organisms can respond to objects in its environment
-Growth and change - The organism can develop, grow, change
-Ability to reproduce - The organism can reproduce on its own or with others from their species
-Have a metabolism and breathe
-Maintain homeostasis
-Being made of cells
-Passing traits onto offspring
NEED HELP PLEASE! Based on the figure, which of the following statements best describes the relationship between regions 1 and 2 of the protein?
A- Region 1 is hydrophilic because it interacts with the interior of the membrane, whereas region 2 is hydrophobic because it interacts with an aqueous environment.
B- Region 1 is hydrophilic because it interacts with an aqueous environment, whereas region 2 is hydrophobic because it interacts with the interior of the membrane.
C- Region 1 is hydrophobic because it interacts with the interior of the membrane, whereas region 2 is hydrophilic because it interacts with an aqueous environment.
D- Region 1 is hydrophobic because it interacts with an aqueous environment, whereas region 2 is hydrophilic because it interacts with the interior of the membrane.
The best description of relationship between regions 1 and 2 of the protein is region 1 is hydrophilic because it interacts with an aqueous environment, whereas region 2 is hydrophobic because it interacts with the interior of the membrane. Thus, option B is correct.
What is hydrophilic and hydrophobic?
Hydrophilic because it interacts with the interior of the membrane, whereas region 2 is hydrophobic because it interacts with an aqueous environment and hydrophilic because it interacts with an aqueous environment, whereas is hydrophobic because it interacts with the interior of the membrane.
Hydrophobic because it interacts with the interior of the membrane, whereas hydrophilic because it interacts with an aqueous environment and hydrophobic because it interacts with an aqueous environment, whereas hydrophilic because it interacts with the interior of the membrane.
Therefore, The best description of relationship between regions 1 and 2 of the protein is region 1 is hydrophilic because it interacts with an aqueous environment, whereas region 2 is hydrophobic because it interacts with the interior of the membrane. Thus, option B is correct.
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Which of the following is made of cells?
Which of the following is made of cells A:rock B:snowflake. C:rain drop. D:leaf
3 examples of situations where a force is a nuisance
Answer:
getting shoved
getting hit
stubbing your toe
Explanation:
