Answer:
The heart has four chambers: two atria and two ventricles.
Explanation:
The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle. The right ventricle pumps the oxygen-poor blood to the lungs. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.
Answer:
The four chambers of the heart are the Right atrium,Left atrium,Right ventricle and Left ventricle.
Explanation:
Have a great day♡
Edrophonium is a drug the blocks cholinesterase from breaking down acetylcholine in the muscles. Why does this improve Annie's muscle function?
Answer:
Edrophonium is a drug used for the treatment of myasthenia gravis, a long-term neuromuscular disease that leads to varying degrees of skeletal muscle weakness, which results from antibodies that block or destroy nicotinic receptors at the junction between the nerve and muscle. By blocking cholinesterase, an enzyme which demolish acetylcholine, it increases the amount of acetylcholine in the neuromuscular junction improving the muscle weakness
It improves Annie's muscle function as a result of the acetylcholine not
being able to be broken down in the muscles.
Acetylcholine is a neurotransmitter that sends signals to the brain and other
parts of the body in the activation of the skeletal muscles.
The drug known as Edrophonium which blocks cholinesterase breaking
down acetylcholine in the muscles will thereby lead to more presence of
acetylcholine and a corresponding increase in the muscle functions.
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Explain how altitude affects ecosystems
Answer:
More specifically, biomes are determined primarily by temperature and precipitation and altitude is going to have effects on both temperature and precipitation. As altitude increases, temperature decreases. ... Thus, altitude is going to affect both temperature and precipitation which will affect the composition of biome.
how is the mitochondrial DNA (mtDNA) transferred from generation to generation.
Answer:
maternal mtDNA
Explanation:
While nothing but the haploid nucleus remains of the sperm during fertilisation, the ovum still has its mitochondria and other organelles. Mitochondria are capable of division and will divide according to cell's needs.
So it is the maternal mtDNa that gets passed on. Spontaneous mutations can happen at any point ofcourse and get passed on in the same way.
A nucleotide is made of three parts. They are: __?__, __?__, and __?__.
Answer:
Sugar, phosphate group, and a nitrogenous base.
Explanation:
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Positive feedback is a control system that sends a signal to ________ a response.
Answer:
increase
Explanation:
hope this helps you :)
A flood is an example of a ________ because it usually affects all populations in the same way
Answer:
density-independent limiting factor
Explanation:
thats the answer
Answer: density-independent limiting factor
Explanation:
thats the answer trust me
Which of the following describes erosion caused by glaciers?(2 points)
It forms big ice chunks.
It changes the temperature.
It happens quickly.
It takes a long time.
Answer:
NUMBER TWO DONE BOIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
Explanation:
If too many pandas are competing for bamboo (their food), what could happen?
Answer:
The correct answer would be - eventually, there will no be enough bamboo for all.
Explanation:
Competition for a single resource usually results in the scarce of the particular resource and eventually, there will be no resources in the end. In this case, it is given that there is too many Panda in a particular area competes for bamboo.
Due to this competition, there will be less bamboo initially, and eventually, there will be not enough bamboo for all the pandas. The correct answer will be - eventually, there will no be enough bamboo for all.
The nucleus of an atom contains at least one
proton.
True or false
Answer:
True
Explanation:
The only type of human cell that is never replaced is ___. *
Answer:
The only type of human cell that is never replaced is Nerve cells.
Hope this helps you. Do mark me as brainliest.
The only type of human cell that is never replaced is nerve cell.
What is a nerve cell?Neurons are in charge of receiving sensory input from the outside world, sending action potentials to our muscles, and transforming and relaying electrical signals at every step in the process.
The nerve cell is the basic unit of communication in the nervous system (neuron). The cell body, a major branching fiber (axon), and numerous smaller branching fibers comprise each nerve cell (dendrites).
They do not divide in any way. There are only two exceptions to this rule: only two specific areas of the brain can produce new neurons. However, for the most part, the brain is unable to replenish dead neurons.
Thus, nerve cells are the ones that never gets replaced after getting injured.
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Which statement about the structure of DNA is NOT true?
Long strands of DNA are twisted in the form of a double helix.
Long strands of DNA are twisted in the form of a double helix.
DNA contains four different nitrogen bases including adenine, guanine, cytosine, and uracil.
DNA contains four different nitrogen bases including adenine, guanine, cytosine, and uracil.
DNA is made of linked nucleotides which are each made of a sugar, a phosphate and a nitrogen base.
DNA is made of linked nucleotides which are each made of a sugar, a phosphate and a nitrogen base.
DNA consists of two strands joined together by complementary base pairing.
A woman is found to have 47 chromosomes, including 3 X chromosomes. This condition likely resulted from _________________ during meiosis.
a.) karyotyping
b.) nondisjunction
c.) crossing over
d.) synapsis
Answer:
b.) nondisjunction......
A woman is found to have 47 chromosomes, including 3 X chromosomes. This condition likely resulted from nondisjunction during meiosis.
What do you mean by Chromosomes?Chromosomes may be defined as tiny, threadlike structures inside most cells of every organism, or living thing which carries the genetic information.
The presence of 3 X chromosomes indicates the condition of trisomy which arises as a result of non-disjunction.
When homologous chromosomes fail to separate at meiosis resulting in a germ cell containing 24 chromosomes rather than 23.
Therefore, a woman is found to have 47 chromosomes, including 3 X chromosomes. This condition likely resulted from nondisjunction during meiosis.
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The number of wild horses, per square mile, in a prairie, is the horse population
5 points
Density
Dispersion
Size
Birth rate
calculate the Deer population for the
Answer:
d
Explanation:
ultiple Choice (1 point each). Identify the choice that best completes the statement or answers the question. b. 1. Thick fur on deer is not an example of coevolution. Why? ... d. predation. The number of wild horses per square kilometer in a prairie is the horse populations a. density. c. size. b. dispersion. d. birth rate. 13.
how many codons specify 5 amino acids?
Answer:
20, Im not completely sure tho
Explanation:
PLEASE HELP! DUE SOON!!!
What statement is true of channel and carrier proteins?
A. Channel and carrier proteins always move substances from the side of the membrane with the highest concentration to the side with the lowest concentration.
B. Channel and carrier proteins always move substances from the side of the membrane with the lowest concentration to the side with the highest concentration.
C. Channel proteins undergo a shape change, while carrier proteins do not.
Answer:
A
Explanation:
Channel and carrier proteins are both considered facilitated diffusion. We also know that materials do not like to go against the concentration gradient so we can eliminate B.
help me please, its biology i need help with the answer an why you chose that answer
Answer:
I think G if I’m wrong try F OR J
Explanation: tell me if I’m wrong
Can you guys pls help me?!!! It’s due tonight put them in order pls :)
HELP!!...............
Answer:
option D
Explanation:
Answer:
bacteria do not interact with organisms, so they do not maintain or disrupt their health.
Is d
Explanation:
1. Which European countries sent explorers during the Age of Contact that
set foot in Texas? *
How many types of genes are there? Name them.
Answer:
Where my dear i don't know what you saying
Answer:
30,000the names of some are BcL2-associated Xprotein and BcL2 antagonist/kil 2 and B-cell CLL/ly mphom2 and brain derived nurotrophic factor
Water, carbon dioxide, oxygen and some other substances can pass through the cell membrane because?
Answer:
Water, carbon dioxide,oxygen and some other substances can pass through the cell membrane because oxygen and carbon dioxide moves across the cell membranes from a simple diffusion a process that does not require any energy input and is driven by differences in concentration on the other side of the cell membrane.
12 Rachel is analyzing a DNA sample to identify its base pairs. Her results show that
40% of the sample is adenine. Which other base makes up 40% of the sample?
A cytosine
C thymine
B guanine
Duracil
Answer:
thymine
Explanation:
Adenine binds to thymine in a DNA and with uracil in RNA
Tim does not need to factor his amino acid consumption into the total protein intake because they are components of protein, not full protein
Answer:
Yes.
Explanation:
Yes, amino acid can not be factor or broken down because it is the smallest unit of proteins. Proteins are made up of about 20 small amino acids. Proteins can be factor into amino acids but amino acids can't be factor into proteins because proteins are made up of amino acids but the amino acids does not formed from proteins so that's why Tim does not factor his amino acid into total protein.
A6003b Life Sci 7-2
SATIC
more
Why are the male and female reproductive systems
important?
Answer:
the male and female reproductive systems are important so that we can keep the planet populated and have families.
A train travels 67 km, north along a straight track in 39 minutes. What is the train's average
velocity in kilometers per minutes?
A. 28Km/mins
B. 1.72Km/mins
C. 0.582Km/mins
D. 106 Km/mins
Answer:
B. 1.72Km/mins
Explanation:
The topic is Mathematics, not Biology but okay!
All you have to do is 67/39 which equals 1.72km/mins.
This is because you have to work out the average speed in kilometres per minute. 39/39 = 1 minute
I hope this helps you!! ^-^
PLS HELP!!
In a normal distribution, the number of organisms exhibiting a phenotype variant near the lowest value is(1 point)
-greater than the number exhibiting a variant near the highest value.
-greater than the number exhibiting a variant near the middle value.
-less than the number exhibiting a variant near the middle value.
-less than the number exhibiting a variant near the highest value.
Kamar is looking for his birth mother. Kamar knows that his blood type is AB and his father’s blood type is heterozygous A. What can Kamar assume about his mother’s blood type?(1 point)
-Kamar’s mother must be either AB or B because blood types AB is considered codominant.
-Kamar’s mother must be AB because blood type AB is inherited from one parent.
-Kamar’s mother must be O because the recessive allele allows for Kamar to get type A from his father.
-Kamar’s mother must be either A or O because blood type AB is considered incomplete dominant.
A statistician collects height data in inches for a school district. Which sample is most likely to produce a normal distribution?(1 point)
-Grade 10-12
Height Range 55 - 60 60 - 65 65 - 70 70 - 75
Frequency 4 9 8 4
-Grades 1-3
Height Range 30 - 35 35 - 40 40 - 45 45 - 50
Frequency 4 1 10 10
-Grades 7-9
Height Range 50 - 55 55 - 60 60 - 65 65 - 70
Frequency 11 5 6 3
-Grade 4-6
Height Range 45 - 50 50 - 55 55 - 60 60 - 65
Frequency 12 8 4 1
The different variants of a trait available to a gene are called(1 point)
-alleles.
-genotypes.
-polygenic traits.
-phenotypes.
A wolf populations’ undercoat thickness follows a normal distribution. Suppose climate change causes the winters to grow colder. Over many generations, the distribution of undercoat thickness in this population will likely(1 point)
-shift toward a thinner coat.
-shift toward a thicker coat.
-remain the same.
-no longer be normal.
HELPPPP PLEASE....
:)
1 is a: less than...middle value
2 is c: ab or b
3 is d: grade 10-12
4 is a: alleles
5 is a: ..... thicker coat
Explanation: just took this, these are the correct answers for MY quick check. could very well be different for yours. hope this helps though :)
The wolves undercoat will grow towards been thicker in order to protect the wolves from extreme cold conditions posed by the winter and this phenomena is called adaptation.
Blood types of offspring's are determined by the blood groups of both parents therefore if Kamara has a blood type AB his mother will mostly likely have either AB or B blood type.
Alleles are the different variants of a gene in living organisms but they are located at the same position on the chromosome.
Hence we can conclude that answers to the questions are as listed above.
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What type of questions can ice cores answer?
A. What the climate was like on earth in the past
B. Why the climate changed in the past
C.What type of wild-life lived on earth in those times
Question 6
Thermal is to heat as _____
is to water.
A. Absorb
B. Dilute
C. Waste
D. Drain
Answer:
drain
Explanation:
thermal is to hear as drain is to water
Answer:
thermal is to heat as dilute is to water
Need help pls brainless to. Who ever helps
An alien has a mass of 75 kg and weighs 225 N. What is the acceleration
due to gravity on the alien's home planet? Don't forget units! *
Answer:
What is the median of the data displayed in this box-and-whisker plot?
42
49
54
57
Box-and-whisker plot ranging from 34 to 58 with ticks at increments of 1. Plot defined by points at 35, 42, 49, 54, 57.
Explanation:
if the first one is zero divide it