In examining a picture of a cell taken with an electron microscope, a student observes that the cell has a nucleus and a cell membrane, but not a cell wall. The student can correctly conclude that the cell probably comes from:
A. an animal
B. a fungus
C. a seaweed
D. a plant
Answer:
D. an animal
Explanation:
fungus has a form of cell wall
seaweed is a plant so it contains a cell wall
and all plants have a cell wall
animal cell only have a membrane
What is an atomic theory
Answer:
the theory that all matter is made up of tiny indivisible particles (atoms). According to the modern version, the atoms of each element are effectively identical, but differ from those of other elements, and unite to form compounds in fixed proportions.
Explanation:
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How do tree barks grow darker
Inez has two beakers that contain ethanol. One beaker contains 150 mL of liquid. The other beaker contains 300 mL of liquid. What can Inez expect to observe when she compares the properties of the liquid in the beakers.
The correct answer is B. The melting point of the liquid in each beaker is the same.
Since both beakers contain ethanol, Inez can expect the liquids in the beakers to have the same chemical properties, such as the molecular structure, boiling point, and density that are present in option A.
What is ethanol?If Inez adds a small object (like a grape or a paper clip) to each beaker, she may observe that the object sinks faster in the beaker with the smaller volume of liquid as there is less liquid to displace, and many factors like density and surface area play an important role in this, as the liquid in the larger beaker will be more massive and may feel heavier than the liquid in the smaller beaker, and if Inez were to leave both beakers out in the open air, the ethanol in both beakers would eventually evaporate, but at different rates.
Hence, Inez can expect the liquids in the beakers to have the same chemical properties, such as the molecular structure, boiling point, and density, that are present in option A.
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question is incomplete, complete question is below
Inez has two beakers that contain ethanol. One beaker contains 150 mL of liquid. The other beaker contains 300 mL of liquid. What can Inez expect to observe when she compares the properties of the liquid in the beakers.
A)to have the same chemical properties, such as the molecular structure, boiling point, and density
B)to have the different chemical properties, such as the molecular structure, boiling point, and density
Why Are Plants Having Tendrils?
Answer:
The reason behind why some plants have tendrils is: A plant's ringlets or tendrils can frame from its branches, shoots, or leaves. This life structures helps bolster the plant development and forestalls the hanging of the plant so it abstains from breaking its stem.
THIS ORGANELLE IS A VERY IMPORTANT FACTOR FOR MITOSIS AND MEIOSIS
Answer:
One of the characteristics of living things is the ability to replicate and pass on genetic information to the next generation. Cell division in individual bacteria and archaea
usually occurs by binary fission. Mitochondria and chloroplasts also replicate by binary fission, which is evidence of the evolutionary relationship between these organelles and prokaryotes.
Cell division in eukaryotes is more complex. It requires the cell to manage a complicated process of duplicating the nucleus, other organelles, and multiple
chromosomes. This process, called the cell cycle, is divided into three parts: interphase, mitosis, and cytokinesis. Interphase is separated into three functionally
distinct stages. In the first growth phase, the cells grows and prepares to duplicate its DNA. In synthesis, the chromosomes are replicated. The cell prepares to divide. In mitosis, the duplicated chromosomes are separated into two nuclei. In most cases, mitosis is followed by cytokinesis, when the cytoplasm divides and organelles separate into daughter cells. This type of cell division is asexual and important for growth, renewal, and repair of
multicellular organisms.
Cell division is tightly controlled by complexes made of several specific proteins. These complexes contain enzymes called cyclin-dependent kinases (CDKs), which turn on
or off the various processes that take place in cell division. CDK partners with a family of proteins called cyclins. One such complex is mitosis-promoting factor (MPF),
sometimes called maturation-promoting factor, which contains cyclin A or B and cyclin-dependent kinase (CDK). CDK is activated when it is bound to
cyclin, interacting with various other proteins that, in this case, allow the cell to proceed from G2 into mitosis. The levels of cyclin change during the cell cycle. In
most cases, cytokinesis follows mitosis.
Explanation:
The Frontline Child Care Portal has information pages for which groups?
Employers, schools, doctors, and state agencies
Parents, employers, schools, and child care providers
Schools, child care providers, doctors, and state agencies
Parents. doctors, employers, and schools
State agencies only
Answer: Parents, employers, schools, and child care providers
Explanation:
The Frontline Child Care Portal was created to help alleviate the burden of childcare from frontline employees such as doctors, nurses and grocery store owners as they work during this very trying pandemic season.
The portal connects parents who are essential workers, Employers with employees in need of child care services and schools and child care providers who are licensed and can offer their services to the parents in need.
What is the factor that you measure at the end of an experiment to see the effect of the change in something else?
according to cell theory, which are made of cells? check all that apply
Answer:
kitten
Bacteria
Mushrooms
cactus
Answer:
kitten
Bacteria
Mushrooms
cactus
Explanation:
Who is air warmer near earths surface
Earth is a closed system. true or false
that is true.!
the earth is a closed system
Earth is a closed system, therefore, it's true.
A closed system simply means a system where only energy is transferred in the surroundings. On the other hand, an open system is one where matter and energy can be transferred.
It should be noted that Earth is a closed system due to the fact that only energy can be naturally transfered in the atmosphere. In this case, it's neither gaining matter nor losing it.
Therefore, the statement is true.
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storing raw fish in ice that is continuously draining helps prevent which type of contamination
Answer:
Explanation:
It prevents biological contamination
Storing raw fish in ice that is continuously draining helps prevent which type of contamination: Biological Contamination
Biological contamination occur when pathogens or micro organisms such as Bacterias, viruses, fungi etc pollute our food which inturn can be harmful to the body when consume as they can lead to food borne illness.
This pathogens are very tiny in nature and they tend to increase and spread fastly.
Storing fish that are raw in ice that drain continuously helps to prevent pathogens from growing and spreading on the fish.
Biological contaminated food are unsafe to eat and they can be very harmful to our body when consume.
The following should be put in place so as to reduce the risk of biological contamination
•Ensures that all food are properly cook and properly serve
•Thoroughly clean and sanitize all food tools
•Ensures regular personal hygiene such as regular hand washing etc
Inconclusion Storing raw fish in ice that is continuously draining helps prevent which type of contamination: Biological Contamination
.
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Luca claims that the patterns of stars in the sky only appear to move, but that the patterns do not change. Which piece(s) of evidence would best support this claim?
1. Observations that some stars can be seen in every season
2. Observations that the patterns of stars in the sky stay the same although they appear to shift across the sky nightly
3. Observations that different stars appear in different seasons, but the patterns of the stars remain the same
Answer:
2
Explanation:
Sorry about the other guy, its 2
Theory, hypothesis, law, or fact
2.
Water freezes at 32° F
ill
3
The solar system formed from a disk of spinning disk of gas and dust
4
F = ma
5
The Universe is expanding
6
Newton's Laws of Motion explain why orbits are ellipses
7
The Universe was created at an event known as the Big Bang
8
More babies are born at the full moon
9
Matter is composed (made up of) atoms
10
Sections of the earth's crust move around over the mantle as a result of convection
11.
Darvwin explained how life on Earth evolved over time by examining the fossil record
Answer:
Explanation:
This question seeks to classify the statements made into Theory, Hypothesis, law or fact.
An hypothesis is a scientific guess which when experimented is conducted, a theory is carefully proposed to explain this experiment and the conclusions thereof. And a law is a certain description (usually proposed by an individual or group of individuals) of a particular phenomenon that must undergone a certain level of scientific inquiry. A fact is however a truthful statement of assertion that could be easily verifiable.
(2) Water freezes at 32° F
Fact (because water freezes at 0°C which is same as 32° F and be easily verified)
(3) The solar system formed from a disk of spinning disk of gas and dust
Theory (This is one of the theories that suggests the formation of the solar system)
(4) F = ma meaning Force = mass × acceleration
Law (This is a mathematical representation of the Newton's second law of motion)
(5) The Universe is expanding
Theory (This is the cosmological theory proposed by Edwin Hubble using the relationship between the speeds of distant galaxies and their respective distances from Earth)
(6) Newton's Laws of Motion explain why orbits are ellipses
Fact (because the Newton's laws of motion indeed provided explanation about the earth's movement around the sun which shows/describes how earth is being pulled into an elliptical orbit)
(7) The Universe was created at an event known as the Big Bang
Theory (This is popularly known as the Big Bang Theory)
(8) More babies are born at the full moon
Hypothesis (This is just a guess and still requires a scientific experiment to back it up)
(9) Matter is composed (made up of) atoms
Theory (This is one of the postulates of the Dalton's atomic theory)
(10) Sections of the earth's crust move around over the mantle as a result of convection
Fact (This is known as mantle convection)
(11) Darwin explained how life on Earth evolved over time by examining the fossil record
Theory (This statement describes what is known as the Darwin's theory of evolution)
Explain why the amount of water a person needs to survive can be highly variable.
Answer:
Not only is water necessary for the physical survival of humans, but many, if not most, human activities also make use of it. Agriculture is critically dependent upon continual supplies of freshwater. Human households also use freshwater daily for cleaning and laundry as well as for transporting sewage to waste treatment plants.
Answer:
Not only is water necessary for human physical survival, but it is used by many, if not most, human activities. Agriculture relies heavily on the continuous supply of freshwater. Even human households use fresh water every day for cleaning, cleaning, and transporting wastewater to sewage treatment facilities.
Explanation:
the main muscle of the upper back is
Answer:
trapezius
Explanation:
Why we should care for producers? Write any four reasons .
Answer:
Explanation:
1) provide energy
2) provide oxygen
3) food chain
4)maintain carbon dioxide - oxygen balance in air.
Which sentence describes an example of sublimation? A. Dew forms on leaves on a cold morning
Answer:
Dry ice changes to carbon dioxide when kept in an open container.
Signal transduction pathways lead to a cellular response. Which of the potential cellular responses is most likely to occur in response to cortisol?
add: 6 2/8 + 1 1/3
please help me
UAC)
JUGC Cys
CGC
A strand of mRNA has the bases guanine-cytosine-uracil. Which amino acid
corresponds to these bases?
- Messenger
Second base in codon
RNA Codons U
С
A
UUU
UCU
UAU UGU
UUC
Phel
UCC
TYT
Ser
UUAU
Leu
UCA UAA Stop UGA Stop
UUG UCG UAG Stop UGG Trp
CUU CCU CAU: CGU
CCC
CUC
CAC
His
Leu
Pro
Arg
CUA
Gin
CGA
CUG CCG CAG
AUU
ACU
AAU AGU
Asn
Ser
AUC
te ACC AAC AGC
А
Thr
C
AUA ACA
Lys
AGA
Arg
AUGS ACG AAG) AGG
GUU GCU GAU
GGU U
GUC
GAC)
Asp
GGC
G
Val
Ala
Gly
GUA GCA GAAT GGA А
Glu
GUG GCG GAG) GGG! G
GCA
CCA
CAA
First base in codon
CGG
واه و ادامه و داماوان دهاوان د
Third base in codon
ААА
GCC
Answer:
They correspond to Alanine
Give an example of a word that contains two morphemes, one free and one bound.
100 POINTS!!! ANSWER ASAP!! Research a scientific belief that was accepted centuries ago, but has since been
disproved. How does it support the use of the term "scientific theory" instead of
"scientific fact?"
Answer:
A scientific theory is an explanation of an aspect of the natural world that can be repeatedly tested and verified in accordance with the scientific method, using accepted protocols of observation, measurement, and evaluation of results. Where possible, theories are tested under controlled conditions in an experiment.[1][2] In circumstances not amenable to experimental testing, theories are evaluated through principles of abductive reasoning. Established scientific theories have withstood rigorous scrutiny and embody scientific knowledge.[3]
The meaning of the term scientific theory (often contracted to theory for brevity) as used in the disciplines of science is significantly different from the common vernacular usage of theory.[4][note 1] In everyday speech, theory can imply an explanation that represents an unsubstantiated and speculative guess,[4] whereas in science it describes an explanation that has been tested and widely accepted as valid. These different usages are comparable to the opposing usages of prediction in science versus common speech, where it denotes a mere hope.
The strength of a scientific theory is related to the diversity of phenomena it can explain and its simplicity. As additional scientific evidence is gathered, a scientific theory may be modified and ultimately rejected if it cannot be made to fit the new findings; in such circumstances, a more accurate theory is then required. That does not mean that all theories can be fundamentally changed (for example, well established foundational scientific theories such as evolution, heliocentric theory, cell theory, theory of plate tectonics, germ theory of disease, etc.). In certain cases, the less-accurate unmodified scientific theory can still be treated as a theory if it is useful (due to its sheer simplicity) as an approximation under specific conditions. A case in point is Newton's laws of motion, which can serve as an approximation to special relativity at velocities that are small relative to the speed of light.
Scientific theories are testable and make falsifiable predictions.[5] They describe the causes of a particular natural phenomenon and are used to explain and predict aspects of the physical universe or specific areas of inquiry (for example, electricity, chemistry, and astronomy). Scientists use theories to further scientific knowledge, as well as to facilitate advances in technology or medicine.
As with other forms of scientific knowledge, scientific theories are both deductive and inductive,[6] aiming for predictive and explanatory power.
The paleontologist Stephen Jay Gould wrote that "...facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts."[7]
Explanation:
Answer: Answer: In the past was believed that species were fixed entities Explanation: Before Darwin's evolutionary theory (in which all living things arise through descendant…
Explanation:
Shelly wants to find the speed that her dog can run. What should Shelly do?
measure the distance the dog runs
measure the time the dog runs
measure the size of the dog and the distance it runs
measure the time it takes for the dog to run a certain distance
Answer:
measure the time it takes for a dog to run a certain distance
which waste product would most likely build up in the body if the lungs do not function properly?
Answer:
Carbon dioxide
Explanation:
took the quiz
Juan and his science class are constructing models of sugar crystals. He wants his model to show how the sugar molecules move in the crystal. He is using plastic foam balls to represent the sugar molecules. How should he put the plastic foam balls together to make his model? O A. Connect them with stiff springs B. Fill a clear cube with them O C. Glue them together D. Place a few of them in a plastic bag
Answer:
The correct answer is option B. "Fill a clear cube with them".
Explanation:
Sugar crystals, colloquially known as "rock candy", are conglomerates of sugar molecules that are formed when sugar-saturated water are cooled. Sugar crystals are arranged in a three dimensional repeating pattern, forming a cube like structure. Therefore, Juan could fill a clear cube with its plastic foam balls to represent sugar crystals. I attached an image of sugar crystals dissolving in water as reference.
Answer:
The correct answer B: Fill a clear cube with them.
Explanation:
Can someone get me Pokémon go hacked for IOS without human verification?
Ions are
Atoms with more neutrons than protons
Atoms with a positive or negative charge
Atoms with no charge
Atoms with more protons than neutrons
Atoms that are joined together in fixed proportions
Answer:
Ions are atoms with a positive or negative charge.
Explanation:
Ions are atoms or molecules that, when subjected to the phenomenon of ionization, gain or lose electrons, ceasing to be neutral and acquiring an electric charge.
The charge that atoms or molecules possess can be positive —if it has lost electrons— or negative when it acquires electrons. The negatively charged particle is called anion, and when it is positively charged cation.
The other options are not correct because of:
There are usually as many or more neutrons than protons. Uncharged atoms are neutral. The number of protons or neutrons does not affect the electric charge of the atom.Atoms that joined in fixed proportions can form molecules.Familial Down syndrome is similar to primary Down syndrome in that it is caused by trisomy 21. However, in familial Down syndrome, all or part of the third copy of chromosome 21 has translocated onto another autosome, typically chromosome 14. In cases of familial Down syndrome, one of the parents of the affected child is often a carrier of a translocated chromosome. The translocation carrier parent does not have Down syndrome because he or she has a total of two copies of chromosome 21.Suppose that a woman is a translocation carrier of chromosome 21 on chromosome 14. She conceives six zygotes with a normal man who carries no aneuploidies. Match the description of the chromosomes inherited by each zygote with the viability of the zygote.
Viable Normal or Translocation carrier,there are;
- Two normal copies of 14 and two normal copies of 21.
- One normal copy of 14 and one normal copy of 21, then one 14 to 21 translocation.
Then viable with down syndrome will include:
- One 21 to 14 Translocation, two normal copies of 21 and one normal copy of 14.
Then the VIABLE with down syndrome will be:
- One normal copy of 14 with two normal copies of 21
- Two normal copies of 14 with one normal copy of 21
- One 21 to 14 Translocation,a normal copy of 21,then two normal copies of 14.
Why did the color of the bromthymol blue change in the carbon transfer through snails and elodea experiment