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Related Questions
A student wanted to test the effectiveness of a new type of drug that would partially block Ca2 channels on the sarcoplasmic reticulum. She had a population of 15 frogs and divided them into three groups: 5 frogs received 50mg of the drug, 5 frogs received 25mg of the drug and 5 frogs received a placebo. She isolated a muscle from each frog and measured how much force it exerted during a contraction. She also recorded the air temperature in laboratory because temperature could affect muscle proteins. What was her dependent variable
Answers
Answer:
This question is incomplete as it lacks options, the options are:
A. drug dose
B. type of drug
C. force of contraction
D. air temperature
The answer is C. Force of contraction
Explanation:
In an experiment, the DEPENDENT VARIABLE (effect) is the variable that responds to the changes made to the independent variable (cause). It is the variable that is measured as the independent variable is being manipulated in the experiment.
In this case, a student wanted to test the effectiveness of a new type of drug that would partially block Ca2 channels on the sarcoplasmic reticulum. She used a total of 15 frogs, which were divided into three groups and administered different doses of the drug (independent variable). However, the AMOUNT OF FORCE A MUSCLE EXERTED DURING CONTRACTION was measured. Hence, the dependent variable is the force of contraction of the muscle.
what is the difference between the flowing water model and the flowing water on earth?
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Answer:
Stream running down a mountain; the water flows over rocks and trees. ... river—complete the hydrologic cycle by returning precipitation that falls on land to the oceans
Explanation:
Answer:
Because the model flowing water is not real
Explanation:
give meh a crow Arghhhh
homologous chromosomes move toward opposite poles of a dividing cell during ______.
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Answer:
anaphase
Explanation:
What are the similar features of Hinduism and Buddhism?
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Answer:
Buddhism and Hinduism both originated in ancient India. Hinduism and Buddhism both involve belief in an ongoing process of rebirth. Both religions have same idea, that one may be released from ongoing rebirth, but are called different things and achieved through different actions.
Prokaryotic cells reproduce when a single cell splits into two cells. This process is known as which of
the following?
Budding
binary fission
vegetative propagation
fragmentation
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Answer:
i need help tooooooooooooo
Answer:
Preparation for Reproduction.
Explanation:
Preparation for Reproduction. Before prokaryotes are able to reproduce, they have to meet certain guidelines that allow them to successfully complete the operation. For example, a prokaryote first has to reach a certain size in order to split into two different cells. This is important because without the necessary nutrients,...
true or false- ebola virus is spiral in nature
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Answer:
TRUE (￣ω￣)/
Explanation:
Ebola viruses are mainly found in primates in Africa and the Philippines; there are only occasional Ebola outbreaks of infection in humans. Ebola hemorrhagic fever occurs mainly in Africa in the Republic of the Congo, Gabon, Sudan, Ivory Coast, and Uganda, but it may occur in other African countries.
Which is true of plant cells and not animal cells?
O A. They have a round shape.
O B. They have a nucleus. .
O c. They contain chlorophyll.
O D. They organize Into tissue.
O E. They are the smallest unit of living matter.
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Answer:
Plant cells contain chlorophyll.
Explanation:
Plants contain chlorophyll which is what causes plants to appear green.
Plants do not have a round shape they have a square boxish shape.
Plant cells do indeed have nucleuses like animal cells .
Plant cells organize into tissue like animal cells.
Plant cells are not the smallest unit of living matter, microorganisms are.
what could a dog living now and a car living thousands of years ago have in common?
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Answer:
movement
Explanation:
Both of them can move and can be move
Which of the following is a way viruses do not cause human diseases?
Viruses cause their host cell to burst and die.
Viruses remain dormant and attack human cells later on.
Viruses attack and kill harmful bacteria.
Viruses are parasitic and they infect their host.
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It’s 2:00 in the afternoon and you haven’t eaten anything since breakfast
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Answer:
you are starving
Explanation:big hungry
Answer:
Explanation:
Ohhh!!! Hahahhah
The diagram below represents part of a process that occurs in cells
Which process is represented?
A meiosis
B osmosis
C replication
D translation
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A researcher had populations of three different breeds of cats. Each breed was supposed to be hypoallergenic and safe for people with cat allergies. To test this, she recruited people to play with the cats and she recorded how many times per minute people sneezed with while playing with each breed. In this experiment, the independent variable was ______, and she should present the data as a _____. Group of answer choices
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Answer: Cat breed; bar graphs
Explanation:
The experiments consists of a dependent and independent variable. The independent variable can be change and is controlled by the experimenter and the dependent variable is dependent on the independent variable.
Here, in this experiment the independent variable is breed of cat. There are 3 different breeds of cats used in the experiment to test the sneezing frequency caused due to allergy from cats.
The data can be presented in the form of bar graphs with x and y representing the the dependent and independent variable.
Hey yall you don't know me but can someone help ill do anything
Answers
Answer:
D is the answer
Explanation:
cause if you make it illegal for them to be hunted the population will grow (it wouldn't let me send without the sentence being 20 characters sorry)
A zebra embryo is in the early stages of development the cells are beginning to look different from each other which statement is the best description of what is happening to the zebra embryo
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Answer:
I think it is A,the cells are differentiating so that they have specialized functions. Because at one point different parts of embryo differentiate to create new different cells and that cells create new muscle cells like skeletal muscle, etc to create new organs.
Explanation:
True or false a producer eats other organisms?
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have a nice day!<3
Answer:
False
producers make food
Explanation:
Why is the cell membrane often called the plasma membrane?
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Answer:
The plasma membrane, also called the cell membrane, is the membrane found in all cells that separate the interior of the cell from the outside environment.
Explanation:
Question 4 of 25
What kind of molecule forms from polysaccharide chains that are very
strong?
O A. Protein
B. Cellulose
C. Monosaccharide
D. Lipid
SUBMIT
PREVIOUS
Answers
Answer:
B. Cellulose
Explanation:
Polysaccharide are substances that contains many units of monomers called MONOSACCHARIDE. They are carbohydrate molecules consisting of very long chains of monosaccharides like glucose, galactose etc.
An example of molecule that forms from strong chains of polysaccharides is CELLULOSE, which consists of long chains of glucose units linked together by B-1,4-glycosidic bonds. Cellulose is the most abundant polysaccharide on Earth found in plant cell walls.
PLEASE HELP!! WILL MARK BRAINLIST!!!
Biosafety practices protect workers, products and _________?
A. EPA
B. animals
C. the environment
D. NIH
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Answer:
the environment
the environment
why do you praise role of decomposers
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Cells in the nervous system have a potential difference of 70mV across the cell membrane separating the interior of the cell from the extracellular fluid. This potential difference is maintained by the iion pumps that move charged ions across the membrane. Is this an emf
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Answer:
The correct answer is - yes, The ion pumps can actively separate charge; thus, they can create a potential difference.
Explanation:
Ion channels create a potential difference by providing a path for the flow of current across the membrane. Ion pumps such as Na+/K+ pump create a potential difference across the membrane by separating the charge.
In the sodium-potassium pump the movement of ions across the inside and outside of the membrane by active transport. The concentration difference between the inside of the membrane and outside of the membrane causes a potential difference.
why are the models of solar systems that you can purchase in stores not to scale?
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Answer:
If they were to scale, it wouldn't fit on Earth since a lot of planets are much bigger than Earth
As the solar systems are around 287 billion kilometers across, the models of a solar system we can buy in stores are not accurate to size.
What is Solar system?The Sun and the asteroids that orbit it make up the gravitationally bound system is known as the Solar System. A massive interstellar molecular cloud gravitationally collapsed to make it 4.6 billion years ago. The Sun contains the great majority of the remaining mass, with Jupiter holding the lion's share of the remaining mass.
The Sun and the things that orbit it make up the Solar System. The Sun, our star, and everything gravitationally attracted to it, including planets like Earth, asteroids, meteors, comets, and many other objects, make up our solar system.
Thus, as the solar systems are around 287 billion kilometers across, the models of a solar system we can buy in stores are not accurate to size.
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If a reaction in one direction releases energy, the reaction in the opposite direction
a.
also releases energy.
b.
absorbs energy
C. destroys energy
d.
cannot occur.
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If a reaction in one direction releases energy, the reaction in the opposite direction ABSORB ENERGY (Option B)
All chemical reactions involve some type of transfer of energy.There are two types of chemical reactions: exothermic reactions and endothermic reactions.An exothermic reaction is a process that releases heat (i.e., releases energy), while an endothermic reaction requires an input of energy to proceed.In conclusion, if a reaction in releases energy, a reaction in opposite direction ABSORB ENERGY (Option B).
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oxygen is a substance that dissolves in water. fish absorb from the water. When dissolved oxygen levels are low, it can be hard for organisms to survive. Is this a chemical property, or a physical property. please explain
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Answer:
Physical Property
Explanation:
Chemical properties relate to an actual chemical change. In this case only the quantity of oxygen concentration changes, there is no chemistry change.
Chemical property change example: Iron nail falls into the water and oxidizes/rusts.
In summary, transgenic _______________ flies will produce light in a pattern that reflects the _________________________________ activity of the _______________ gene.
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Answer: per-luc; transcriptional; period
Explanation: While the transgenic fly is expected to have normal transcriptional activity per gene, and a normal biological clock, however, the transgenic fly can have red eyes and per transcriptional activity can be reported as light emissions. Transcription of the transgene results in production of the enzyme luciferase, which acts on luciferin substrate. Therefore, in summary, transgenic per-luc flies will produce light in a pattern that reflects the transcriptional activity of the period gene.
Ants and aphids often live near each other the ants Feed on the waste produced by the aphids and the aphids are protected from predators by the presence of the ants what type of relationship is this
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Answer: the answer is mutualism. please give me brainliest
Explanation: Mutualism is a relationship between two different species in which both species have benefits. In this example, ants benefit because they feed on aphids' wastes while aphids benefit because ants provide them protection.Jul 8, 2016
HI
Which statement describes one of Wegener’s ideas that contributed to the theory of continental drift?
O The continents drifted apart due to repeated meteor impacts.
O The continents were once connected as one landmass.
O The continents have moved apart very quickly due to earthquakes.
O The continents are magnetically pulled toward or pushed away from
one another.
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At the beginning of the formation of the planet Earth the continents were once connected as one landmass.
What was Pangea?Pangea was a huge continental landmass bathed by a single ocean that began to break up 230 million years ago and gave rise to the present-day continents. Configuration of the supercontinent Pangea in the Paleozoic era. Their lands were bathed by the Panthalassic ocean.
This happend it's called Pangea. There were similar fossil records in different continents.
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Answer: b. The continents were once connected as one landmass.
1. Why do you have a dedicated circulation pathway for the spleen, stomach, pancreas, gallbladder, and intestines that passes through the liver
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Answer:
Because the liver is a crucial organ that processes the nutrients that the blood carries. Also, we storage blood when the volume of it is above the normal levels.
Explanation:
The blood that circulates through the spleen, stomach, pancreas, gallbladder, and intestines has to pass through the liver. This organ will metabolize proteins, lipids, cholesterol, bilirubin, toxins, and steroid hormones, also store glycogen, fats, Ferrum, and vitamins, and produce bile. The nutrients that the blood carries are processed in the liver to keep the body healthy and to eliminate substances through bile. The bile will also help with the digestion of nutrients in the intestine.
When the blood from these organs (spleen, stomach, pancreas, gallbladder, and intestines) goes to the liver via the hepatic vein, the hepatic cells process it and deals with the functions previously mentioned. Once that blood is filtered, it goes to the hepatic veins, and from there, to the heart.
The liver and Spleen are the two primary organs of the body, through which blood circulates and purifies. The organs like the gall bladder, spleen, liver, and pancreas are involved in the circulation of blood.
The blood circulated between the organs like the spleen, stomach, intestine, and pancreas is sent to the liver.
The liver plays a crucial role in the metabolism of toxins, bilirubin, proteins, lipids, and cholesterol. Also, glycogen, hormones, and vitamins are also stored in the liver.
The nutrient-rich blood is present in the blood, which helps in maintaining the health and proper functioning of the body.
The blood from these organs is delivered by the hepatic vein to the liver, and the hepatocytes metabolize the nutrients. The blood once filtered and purified, is delivered to the heart via hepatic veins.
Thus, the blood circulation between the liver and other organs like the spleen and gall bladder is necessary to metabolize nutrients before sending them to the heart.
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Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?
a) The offspring will have the correct number of chromosomes when sperm and egg are joined.
b)Gametes have single function which requires less DNA to preform the function compared to somatic cells.
c)A reduction in the number of chromosomes reduces the chances for mutations that would affect the offspring.
d)The chromosomes in gametes are already replicated strands of DNA which returns the number of chromosomes to the original amount.
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Answer:
B.
Explanation:
It is important to reduce the number of chromosomes in half when forming gametes for reproduction because offspring will have the correct number of chromosomes when sperm and egg are joined.
WHAT ARE GAMETES:Gametes are cells produced for the purpose of reproduction. Gametes are produced as a result of meiosis, which reduces the chromosome number by half. Gametes include sperm cells and egg cells, which fuse together to form zygote. The zygote develops into a new organism.Therefore, reduction is necessary in order to have the correct number of chromosomes when sperm and egg are joined.
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a real DNA molecule consists of THOUSANDS of these pairs of nucleotides. What is the pairing arrangement of nitrogen bases
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Answer:
The correct answer is - Cytosine pairs with guanine and thymine pairs with adenine.
Explanation:
In a real DNA or B-DNA the interaction or arrangement of the nitrogen bases are defined and almost remain the same. The bond between the nitrogen bases is hydrogen bonds.
The hydrogen bond between the purine and pyrimidines (types of nitrogen bases) are as follows:
Adenine always pairs with Thymine and Guanine always pairs with Cytosine in a real DNA molecule.
If a DNA has sequence 5’ATTAGCGACGTAT3’, its complementary strand of DNA is TAATCGCTGCATA
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Answer:
Nope
Explanation:
Old: ATTAGCGACGTAT
New: TTATCGCTGCATA
So what you said is wrong because its not.....
TAATCGCTGCATA
Its
TTATCGCTGCATA
U made one "t" at the beginning and 2 "a" after, it should be 2"t" at the beginning and 1 "a" after.