Answer:
The molecular mass of a eukaryotic ribosome is ~3.2×106 Daltons.
The diameter of a eukaryotic ribosome is ~250–300 Å. Å, or angstroms, standing for one hundred-millionth of a centimeter.
What happens during the prophase
the answer is chromosomes become visible the nucleus disappears, the mitotic spindle forms. and the nuclear envelope disappears
Explanation:
I just answered this question for another girl
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Which Statement best describes Earth's oceans
Answer:
salty
Explanation:
Answer:
(I think you chose the wrong photo) but its Ocean covers most of the planet's surface and contain nearly all its water.
Explanation:
what are the two main categories of an ecosystem 5th grade
Which body system has a function most similar to the role lysosome plays for a cell
Answer:
the excretory system
Activity A (continued from previous page) 4. Observe: Wait until the numbers are not changing very much. What do you notice about the solute concentrations inside and outside of the cell? This situation is called dynamic equilibrium
Answer:
Yes, dynamic equilibrium is present in the cell.
Explanation:
In dynamic equilibrium, the concentration of solute remain the same due to equal flowing of solutes inside and outside the cell so there is no change occurs inside the cell, the cell maintain same concentration of solutes both inside and outside the cell. Dynamic equilibrium is a type of equilibrium in which the reactants and products formed at the same rate and no change occurs inside the reaction. In the cell, homeostasis is responsible for maintaining equilibrium in the cell so no change occurs inside the cell.
In which situation would artificial insemination most likely be used over other forms of treatment?
A.
A woman's ovaries do not release any eggs.
B.
A man's testicles have not properly descended, lowering sperm count.
C.
There is a blockage in the fallopian tubes.
D.
The mucus that helps the sperm travel to the uterus is too thick.
Answer:
B
Explanation:
artificial insemination is only used when a man is infertile
Which question can be answered by science?
A. What is the effect of pesticides on the environment?
B. Why do you think people should use paper bags?
C. Should people be forced to reuse plastic bags?
D. Should government be regulating scientific research?
Answer:
A. What is the effect of pesticides on the environment
Explanation: I just took the test
Which is NOT part of hemostasis?
Question 1 options:
Coagulation (blood clotting)
Vascular spasms
Platelet plug formation
Conversion of fibrin to fibrinogen
Question 2 (0.5 points)
A patient with type A blood is accidentally given a transfusion with type B blood. Answer the following questions. How will this affect the patient?
Question 2 options:
It will strengthen the patients immune system.
It will cause severe illness or death.
The patient will now have type AB blood.
The patient will now have type B blood instead of type A blood.
Question 3 (0.5 points)
A hematocrit of 45% would indicate
Question 3 options:
anemia.
45% red blood cells.
45% plasma.
polycythemia.
Question 4 (0.5 points)
Which white blood cell functions to kill parasitic worms and play a role in allergy attacks
Question 4 options:
monocytes
eosinophils
basophils
lymphocytes
Question 5 (0.5 points)
A patient with type A blood is accidentally given a transfusion with type B blood. Answer the following questions. What antibodies does the patient with type A blood produce?
Question 5 options:
anti-A
The patient with type A blood would not produce antibodies.
anti-O
anti-B
Answer:
Explanation:
1. Conversion of fibrin to fibrinogin
2. It will cause severe illness or death
3. Polycythemia
4. Eosonophils
5.anti b
What are the similarities between the different models used to quantify the growth of a population
Answer:The models used are exponential growth models and logistic growth models. They are similar because they both grow slowly. How does carrying capacity affect reproductive rates?In the real world, with its limited resources, exponential growth cannot continue indefinitely. Exponential growth may occur in environments where there are few individuals and plentiful resources, but when the number of individuals becomes large enough, resources will be depleted, slowing the growth rate.
Explanation:
Using established recombinant DNA technology, you insert a gene from a human liver cell into a bacterium. The bacterium then expresses a protein corresponding to the inserted DNA. To your dismay, you discover that the protein produced is useless and is found to contain many more amino acids than does the protein made by the eukaryotic cell.
Assuming there is no mutation in the human gene, explain why this happened.
a. bacteria do not use splicing to edit RNA after its transcription.
b. rRNAs in bacterial cells contain more nucleotides than in eukaryotic cells.
c. bacterial RNA contains less stop codons.
d. amino acids in bacterial cells are specified by double codes.
Answer:
The fact that the amino acid chain is consistently having more amino acids than what is actually present can be attested to the fact of how gene expressions can be observed in the prokaryotic cell compared to the eukaryotic one.
When a doctor needs to give someone a medication intravenously (through a vein), they dilute that medicine in a saline solution (salty water). Why would it be a bad idea for a doctor to mix the medicine with plain water? (Hint: Osmosis is the answer, but you’ll need to explain why.)
Answer:
it is because the blood cells will have too much water in them and they will burst.
Explanation:
there will be less salt inside the cells so all the water will enter the cells. if there is also salt present outside of the cell then the water and the electrolites(salt) will equalize between the inside and the outside of the cell.
Can somebody help me match them
What are the causes of inherited genetic variation
Answer:
Genetic variation can be caused by mutation which can create entirely new alleles in a population, random mating, random fertilization, and recombination between homologous chromosomes during meiosis which reshuffles alleles within an organism's offspring.
Explanation:
hope this helps!!
Answer:
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
Question 28
A person who has PKU, a recessive genetic disorder,
А
inherited the allele for the trait from one parent.
B
inherited the allele for the trait from both parents.
С
is heterozygous for the trait.
ОО
D
will not pass the allele for the trait to his or her offspring.
Answer:
B
Explanation:
In order for one to have a recessive trait, both parents must carry the trait.
XX Xy= XX XX Xy Xy
Xy Xy= XX Xy Xy YY
XX XX= XX XX XX XX
yy yy= yy yy yy yy
Only the options in which both parents have the allele can pass it on. Only if there is no dominant allele will the trait be expressed, which can only be a yy recessive (since heterozygous would be dominant). Therefore, he will pass the allele on to his/her offspring.
What is the main component of red blood cells that carries oxygen?
a. carbon dioxide
b. hemoglobin
c. water
d. salt
Answer: Your answer is B. Hemoglobin
Explanation: Red blood cells are capable of creating a rather unique protein called hemoglobin that carries oxygen to the lungs, and carbon dioxide out of the lungs!
Hope this helps, if not, comment down below!!!
What cell makes up loose connective tissue?
Answer:
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Answer:
collagen and elastic fibres.
Explanation:
fibers and other components of the connective tissue matrix are secreted by fibroblasts
What are the products and reactants of cellular respiration?
How is mutation different from adaptation?
Answer:
It can be a genetic mutation or it can be a change in a strategy. ... In this definition a mutation is any evident change (regardless of its effect on success), and adaptation is a change that made the group thrive in a given circumstance or environment.
Explanation:
Answer:
mutation can be a change in strategy and adaption is a change that made the group thrive in a given circumstance or environment.
A group of students studied four different cell specimens under a microscope and recorded information about each cell
in this table.
Characteristics of Four Cell Specimens
Cell Membrane
Chloroplasts
Yes
Yes
Cell Specimen Cell Wall
Cell 1
Yes
Cell 2
No
Cell 3
Yes
Cell 4
No
DNA in Nucleus
Yes
Yes
Yes
No
Yes
No
No
Yes
-
Yes
Which cell specimen is a prokaryote?
A Cell 1
B Cell 2
C Cell 3
Answer:
Cell 3
Explanation:
One of the unique main characteristics that differentiates a prokaryote from a eukaryote is the absence of presence of nucleus in their cell, and where their DNA is found.
In prokaryotic cells, nucleus is absence. The DNA of prokaryote is not found in a nucleus, rather, it is contained in a region referred to as nucleoid.
Therefore, the specimen that does not have DNA in nucleus is definitely a prokaryote.
Cell 3 is a prokaryote.
When DNA replicates, the first step is
O proteins move along the DNA and "read" the code
DNA polymerase adds new nucleotides to the old strands
a proofreading enzyme checks to see if there are errors in the order of the nucleotides
the double helix is opened down the middle by an enzyme called helicase
you are testing a new blood glucose monitor. every sample that you take gets a reading of 80. which of the following terms best describes the monitors readings?
Answer:
the monitor is reliable but there is not enough info. to comment on validity
Explanation:
The monitor is consistent - which is reliability, but you can't be sure the results it is returning are correct based on the question, so validity can't be determined.
Which of the following is an example of passive transport across a membrane?
a
the movement of H+ into a thylakoid disc during photosynthesis
b
the uptake of glucose in the intestine
с
the uptake of mineral ions into root hair cells of plants
d
the movement of water from the descending loop of a nephron into the interstitium
Answer:
B
Explanation:
i think it is B but i don't really know
What are two ways different types of organisms obtain glucose?
Answer:
Photosynthesis and respiration are two ways organisms obtain glucose.
Explanation:
Photosynthesis – process in which autotrophs use energy from the sun to produce their own food.
Respiration – process in which animals and plants use oxygen in the air to release energy found in glucose.
Hope this helps!
Why do heart cells have different characteristics than skin cells?
Heart cells have different DNA than skin cells.
Heart cells express different genes than skin cells.
Heart cells reproduce by cell differentiation.
Heart cells reproduce by mitosis.
Answer:
Heart cells express different genes than skin cells. B
Heart cells have different characteristics than skin cells because heart cells express different genes than skin cells.
Humans as multicellular organisms possess different cells in our body system. These cells perform varying functions in the body. The different functions performed by different cells is attributed to the cellular differentiation. Cellular differentiation is the process whereby an undifferentiated cell becomes specialized. The cellular differentiation occurs due to the difference in gene expression in each specific cell. All cells contain the same DNA sequence, however, they are expressed differently. Therefore, heart cells have different characteristics than skin cells because heart cells express different genes than skin cells.Learn more at: https://brainly.com/question/18546772?referrer=searchResults
Where are hot and very luminous stars shown on the H-R diagram?
top right
bottom right
top left
bottom left
Answer:
top right
Explanation:
hot starts inhabit the left hand side of the diagram. Bright stars inhabit the top. luminous means bright so it would be top right.
Answer:
bottom right
Explanation:
That is where it shows up when you look at the diagram.
Club foot is a rare disease due to congenital skeletal abnormalities, both genetic and nongenetic factors are thought to be responsible for club foot. A family in which club foot was inherited as an autosomal dominant trait with reduced penetrance was identified in 2008. It was found that a mutation in the PITXI gene that caused club foot in this family. Through DNA testing, they determined that 11 people in the family carried the PITXI mutation, but only 8 of these people had club foot.
Required:
What is the penetrance of the PIXTI mutation in this family?
Answer:
72.72%
Explanation:
The Penetrance of the PIXTI mutation in this family can be represented as
The Penetrance represents the percentage of people who show/have the disease
family size = 11
number of people with the disease = 8
Penetrance of PIXTI in the family can be calculated as = 8/11 * 100
= 0.7272 * 100
= 72.72%
The remaining 27.38 % are just carriers of the PITXI gene
What are characteristics used to describe matter
Answer:
Physical properties are characteristics that describe matter as it exists. Some of many physical characteristics of matter are shape, color, size, and temperature. An important physical property is the phase (or state) of matter. The three fundamental phases of matter are solid, liquid, and gas
Explanation:
Proteins are the most complex group of biomolecules with a wide range of functions. Which of the following best describes the function of proteins?
A) store genetic information, instructions to make proteins
B) form cell membranes, long-term energy storage, insulation
C) aid in metabolism, structural support (hair, nails, bone), create enzymes
D) ready to use energy for cells, structure for cell walls, storage as glycogen
Answer:
C
Explanation:
they aid in metabolism
Based on the data, taken at three different time points, which of the following statements best describes what is observed in the image?
A) The Golgi apparatus is dynamic. The vesicles moved exclusively from the cis face to the trans face.
B) The cisternae of the Golgi apparatus did not change in structure between the cis face and the trans face.
C) The secretory proteins are packaged and tagged for transport as they moved from the trans face to the cis face.
D) The Golgi apparatus can recycle vesicles. Some vesicles moved from the trans face to the cis face for recycling.
Answer:
I think it's D. It makes the most sense.
Explanation:
I am taking the test and found some answers.
Have a great day! ;)
Which are nonpolar?
A.carbohydrates
B. lipids
C. proteins
D. nucleic acids