The question provided is not complete as it lacks the group of choices, however the group of choices are given as follows:
A. A contraction fails to occur because an action potential is not generated in the muscle cell.
B. A contraction fails to occur because this toxin directly prevents ion release from intracellular stores.
C. A contraction fails to occur because neurotransmitter release by the motor neuron is blocked at the neuromuscular junction.
D. A contraction fails to occur because this toxin prevents cross bridge formation and thereby directly prevents contraction.
E. C and D are both true
Answer:
The correct answer is option A : A contraction fails to occur because an action potential is not generated in the muscle cell.
Explanation:
A muscle contraction takes place when action potential bring to muscles by nerves, which is traveled with the help of motor neuron and imitated the muscle contraction.
Acetylcholine or Ach is a chemical messenger to bring the nerve impulses between a nerve and a muscle. If the receptor is block with applying toxin muscle will not contract as ACh will not be able to propagate the nerve impulse to the muscle so there will be no action potential.
The correct answer is option A : A contraction fails to occur because an action potential is not generated in the muscle cell.
How is genetic information preserved during the copying of DNA? View Available Hint(s) Hint 1.opened hint How is genetic information preserved during the copying of DNA? The information is preserved because DNA codes for RNA, which codes for protein. Genetic information is preserved in the linear sequence of the building blocks A, T, G, and C. Genetic information is preserved by base pairing between A and T and between G and C across the two strands of the double helix. The information in DNA is copied into RNA, which is used as a template to copy back to DNA.
Answer:
Genetic information is preserved in the linear sequence of the building blocks A, T, G, and C.
Explanation:
Deoxyribonucleic acid contains genetic information in the bases i.e the Nitrogenous bases Adenine, thymine, Guanine, cytosine are the store for coding genetic information, in them lies the genetic information of an organism. Each base is coding for different gene the is found in the organism.
After the information on the DNA have been moved to an intermediary Ribonucleic acid (RNA) it is been translated into an amino acid a building block of protein containing all the genetic information coded for by the Nitrogenous base.
Why is environmental science important?
Explanation:
it is where we live and share resources with order species
I hope this was helpful
Is there just one universal scientific method?
Answer:
There is no such unique standard method—scientific progress requires many methods—but students in introductory science courses are taught that `The Scientific Method' is a straightforward procedure, involving testing hypotheses derived from theories in order to test those theories.
Explanation:
1. This phylogenetic tree was constructed by comparing sequences for a homologous gene involved in development. Select the correct statement.
A. A phylogenetic tree containing two main branches for evolutionary relationships among the animals.
B. The first branch leads to Drosophila.
C. The second branch divides into two branches, 2a and 2b. Branch 2a leads to Lancelet.
D. Branch 2b divides into two branches: 3a and 3b. Branch 3a leads to Zebrafish.
E. Branch 3b divides into two branches: 4a and 4b. Branch 4a leads to Frog.
F. Branch 4b divides into two branches: 5a and 5b. Branch 5a leads to Chicken.
G. Branch 5b divides into two branches leading to Human and Mouse, respectively.
2. This phylogenetic tree was constructed by comparing sequences for a homologous gene involved in development. Select the correct statement.
A. The common ancestor of a human and a frog and the common ancestor of a mouse and a chicken lived at the same time.
B. The nucleotide sequence of this gene in a mouse is more similar to the sequence in a chicken, and both are less similar to the nucleotide sequence of this gene in a frog.
C. A frog is the ancestor of both a mouse and a chicken.
The figure shows a tree diagram with two main branches. The first branch leads to Drosophila. The second branch divides into two branches 3a and 3b. Branch 3a leads to Lancelet. Branch 3b divides into two branches: 4a and 4b. Branch 4a leads to Zebrafish. Branch 4b divides into two branches: 5a and 5b. Branch 5a leads to Frog. Branch 5b divides into two branches: 6a and 6b. Branch 6a leads to Chicken. Branch 6b divides into two branches leading to Human and Mouse, respectively.
This phylogenetic tree was constructed by comparing sequences for a homologous gene involved in development. Select the correct statement.
The nucleotide sequence of this gene in a mouse is more similar to the sequence in a chicken, and both are less similar to the nucleotide sequence of this gene in a frog.
A frog is the ancestor of both a mouse and a chicken.
The common ancestor of a human and a frog and the common ancestor of a mouse and a chicken lived at the same time.
Answer:
The answer is below
Explanation:
Given the information above, and from the available pictures which showed the detailed analysis of the information presented in the question. It can be concluded that, the nucleotide sequence of this gene in a mouse is more similar to the sequence in a chicken, and both are less similar to the nucleotide sequence of this gene in a frog.
Hence, the right answer is option B.
The immune response of a host against an invading bacterium is often triggered by surface components on the bacterium that are recognized as "non-self" or "foreign" by the host. These non-self components, often protein or polysaccharide in nature, are referred to as antigens. The host responds to these antigens by making antibodies that will react with invading bacteria and mark them or tag them for destruction by phagocytes.
Indicate the bacterial structures that are likely to be antigens, to which host antibodies bind, marking the invader for phagocytosis
a. fimbriae
b. ribosomes
c. cell wall
d. plasmids
e. flagella
f. capsule
g. nucleoid
Answer:
The correct answer is :
a. fimbriae
e. flagella
c. cell wall
f. capsule
Explanation:
There are several bacterial structures that are binds to the host cells and likely to be antigens to which specific antibodies attached to mark or destruct them by phagocytes.
These bacterial structures are common in the fact that all these structures have binding ability to the host cells and invading them some of these structures are : fimbriae, cell wall, flagella, and capsule that are attached to antibodies and cell of the host.
Thus, the correct answer is :
a. fimbriae
e. flagella
c. cell wall
f. capsule
ANSWER ASAP PLEASEEEEEE!!!!!! ILL GIVE 100 POINTS!!
Answer:
d
Explanation:
Answer: D, I believe.
Explanation:
what is not a goal of science
Answer:
to goof around
Explanation:
1. White blood cells attack what??
2. Ability of an organism to feed is called
a nutrition 6 irritability cd growth ad movement
3. The following are types of living things
except
Polista
d) lysosomea
4. Another name for Aues is called a hea
6) birds cd mamals d)
frog
animals are herbivores except
goats giraffes Selephants
d leopardo
5. The following
6. The locomotany organ of earthwor mis a) fors
Dwings as muscles D tube feet.
Sol
7. Spider use for respiration ad lungs b) booklungs
c) gills d) lenticels
The top of the tongue is responsible for a
bitterness c) Saltiness d) sourness.
these is not
organ
b) cose c) Tongue ad liver
9. One of
sense o
a) Eye
Answer:
white blood cell's fight infections from bacteria, viruses, fungi, and other pathogens
Explanation:
Why was the Nationalist Party more popular in China’s cities than in the countryside? Wealthy people who supported the party were concentrated in cities. People in the countryside were less active in politics than people in the city. Poor city dwellers hoped the Nationalist Party would bring economic change. The Nationalist Party threatened to end crop trade with Western nations.
Answer:
Wealthy people who supported the party were concentrated in cities.
Explanation:
Answer:
The answer is A on edgeExplanation:
Which is a difference between a compound light microscope and a scanning electron microscope?
Answer:
the answer is D not what other dude said
Explanation:
How do postprocessual archaeologists approach an artifact? A. They try to discover the time period the artifact came from. B. They seek to derive meaning from the artifact. C. They recreate the artifact in order to study it. D. They try to identify how the artifact has changed over time.
Answer:
c
Explanation:
c
Postprocessual archaeologists approach an artifact by the fact that they recreate the artifact in order to study it. Thus, the correct option for this question is C.
What is meant by Archaeologists?Archaeologists may be defined as a type of person who significantly studies and modifies some sorts of the buildings, graves, tools, and other objects of people who lived in the past. They work basically on human history and prehistory through the uncovering of sites.
Postprocessual archaeologists determine the complete movement of the archaeological theory that basically emphasizes the theory that deals with the subjectivity of the interpretation that is made by other kinds of archaeological branches.
Therefore, postprocessual archaeologists approach an artifact by the fact that they recreate the artifact in order to study it. Thus, the correct option for this question is C.
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why do solids have a fixed shape
Answer: solids have fixed shape because they are rigid and is high dense. The particles are way too close to each other that even force applied to it doesn’t change it shape
what has a greater influence on protien levels
Question is incomplete, The complete question is as follows:
What has a greater influence on protein levels?
A. Protein degradation has a greater influence because they are denatured faster than the cell can produce them
B. mRNA destroyer concentration has a greater influence because it is destroying mRNA before proteins can even be produced
C. mRNA destroyer concentration has a greater influence because mRNA is destroyed right after the proteins are produced
D. Protein degradation has a greater influence because outside factors like antibiotics can cause it, and it is difficult to recover from
Answer:
B. mRNA destroyer concentration has a greater influence because it is destroying mRNA before proteins can even be produced
Explanation:
mRNA destroyer concentration has a greater influence on protein levels because mRNA destroyers abort the mRNA as soon as the enough mRNA are produced before formation of proteins.
mRNA destroyer follow the mRNA around itself and dragged it once mRNA is picked for protein synthesis.
Hence, the correct answer is "B".
How is multi cellularity advantages over increasing the mass of a single cell
Answer:
Multicellular organisms
hoped i helped
Abnormal vascular regulation by endothelial cells in small vessels of the heart contributes to:___________. a. Hypertension b. Dysrhythmias c. Truncus arteriosus d. Ischemic heart disease
Answer: The correct answer to the question is option D
ISCHEMIC HEART DISEASE.
Explanation: To answer the question effectively, let us look at the options given,what they are and how they affect the heart.
Endothelial cells play a crucial role in the regulating vascular tone,They do so by secreting variable amounts of constricting and relaxing factors inorder to control tissue perfusion.
Hypertension on the other hand occurs as a result of factors that varies distinctively and not all related to vascular tone.
Dysrhythmias on it's own will affect the function and conduction of heart chambers but not necessarily vascular tones.
Truncus arteriosus results in only in one large artery exiting/leaving the heart.
which best describes bacterium?
Answer:
Bacteria (singular: bacterium) are classified as prokaryotes, which are single-celled organisms with a simple internal structure that lacks a nucleus, and contains DNA that either floats freely in a twisted, thread-like mass called the nucleoid, or in separate, circular pieces called plasmids. Hope this helps :))
Explanation:
Answer:
Bacteria are classified as prokaryotes, which are single-celled organisms with a simple internal structure that lacks a nucleus, and contains DNA that either floats freely in a twisted, thread-like mass called the nucleoid, or in separate, circular pieces called plasmids.
Explanation:
What is it called when vesicles are used to move substances out of the cell ?
O A. Passive
O B. Endocytosis
O C. Diffusion
D. Exocytosis
Answer:
d
Explanation:
This mammal retains its embryo in its uterus for the full term of the pregnancy. Which mammal is it most likely to be?
Answer:
The mammal that retains its embryo in its uterus for the full term of the pregnancy is the bat. A koala and the kangaroo both carry their babies to term in pouches.
Explanation:
50 POINTS In your own words, describe the connection between the heat from earth’s core and the movement of tectonic plates.
Answer:
ert
Explanation:
Reproductive mother cell
2n
2n
Meiosis
Meiosis
Ovum
n
n
Sperm
Fertilization
2n
Zygote
Answer:
what we should do in this???
can a steam cell taken from a baby, and giving the cell all that needs, can make clone
Answer:
i think so
Explanation:
Clones contain identical sets of genetic material in the nucleus—the compartment that contains the chromosomes—of every cell in their bodies. Thus, cells from two clones have the same DNA and the same genes in their nuclei.
Always use the gross adjustment knob before using the fine adjustment knob when focusing on the microscope 1 2 False True
why the women have big hips?
Answer:
Explanation:
During adoloscence, many changes occur in boys as well as girls.
Growing of the hip region is one of the changes in women.
Hope this helps
plz mark as brainliest!!!!!!!!!
Which of the following is the best definition of alternative energy? A. Energy sources that can be used in place of fossil fuels. B. Energy sources that can be used in place of coal. C. Energy sources that can be used in place of wind energy. D. Energy sources that can be used in place of hydroelectric energy.
Answer:
My answer is D.
Energy sources that can be used i. place of hydroelectric energy.
The best definition of alternative energy is energy that can be used in place of fossil fuels. The correct option is A.
What is alternative energy?Alternative energy is that energies are used in the place of the conventional form of energy. These energies are renewable and eco-friendly.
The burning of coal and fossil fuel produces lots of greenhouse gases, so the best alternative energy is the one that replaces it.
Thus, the correct option is A. Energy sources can be used in place of fossil fuels.
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The hydrogen atom has one _____ and one _____.
Answer:
The hydrogen atom has one proton and one electron.
Answer: the h2 atom has one electron and one proton.
E = p^+
Just keep in mind that electrons ar always equal to the protons. so you don’t have to worry !
what is difference between pressure exerted by liquid than by a solid
Proton pumps embedded in the cell membrane use ATP to move hydrogen ions across the membrane. Which of the following best describes a function of the proton pump? A. It decreases the pH inside the cell to prevent toxicity. B. It generates a voltage across the membrane as a way to store energy. C. It helps maintain homeostasis by absorbing electrical charges. D. It increases the fluidity of the cell membrane as energy is used.
Answer for anyone who may still need it: B. It generates a voltage across the membrane as a way to store energy.
What molecule is required each time the myosin head detaaches from one site and reattaches to another
Answer:
The adenosine triphosphate (ATP) molecule
Explanation:
The actin filaments are often associated with myosin to produce muscle contraction. These myosin filaments are considered to be 'molecular motors' capable of converting the chemical energy contained in the ATP molecule to mechanical energy, thereby producing cell movement. Myosin heads bind to actin filaments in order to generate a power stroke. When the adenosine triphosphate (ATP) molecule binds to myosin, the myosin head detaches to the actin filament. During this process, the ATP molecule is broken down and then the released energy is used by the myosin filament to return to its original position.
Which of the following is an organic molecule?
Answer:
glucose, water is found organisms but mixed with other substances
Match the current applications to the appropriate branch of genetics. Not all applications will be placed.
a. Hereditary genetics
b. Population genetics
c. Molecular genetics
1. Observing phenotypes in offspring to understand gene inheritance.
2. Tracing pedigrees to determine patterns of gene transmission within a family.
3. Calculating allele frequencies to determine changes within gene pools.
4. Expressing exogenous transgenes to understand function.
5. Identifying gene mutations associated with a genetic disease.
Answer:
a. Hereditary genetics = 1 and 2
b. Population genetics = 3
c. Molecular genetics = 4 and 5
Explanation:
Genetics is a discipline that studies the transmission of heritable traits from parents to offspring. Population genetics is a discipline that analyzes genetic and allele frequencies in natural populations, as well as their changes in evolutionary processes. Finally, molecular genetics is a research field that studies the structure of the DNA molecule, its replication and the development of genetic engineering technologies associated with the manipulation of genetic information.
a. Hereditary genetics = 1 and 2
b. Population genetics = 3
c. Molecular genetics = 4 and 5
The following information should be considered;
Genetics refers to a discipline that studies the conversion of heritable traits from parents to offspring. Population gen-etics should be the discipline that analyzes genetic and all-ele frequencies in a natural populations along with it their changes in evolutionary processes. So, molecular gen-etics means the research field that studies the DNA structure molecule, its replication and the development of gen-etic.learn more: https://brainly.com/question/3617478?referrer=searchResults
