Answer:
When fluids (liquids and gases) are heated, they expand and therefore become less dense. Any object or substance that is less dense than a fluid will float in that fluid, so hot water rises (floats) in colder water.
Explanation:
When you heat up water, the water molecules start moving around faster and faster. ... So hot water is less dense than cold water. When you put the two together with the hot water on the bottom, the hot water rises to the top.
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2. Discuss four types of evidence that support the theory of evolution.
HELP PLZ!!!
Evidences that support the theory of evolution;
1. COMPARATIVE ANATOMY;
This is done to compare the anatomy structures of organisms to check the adaptive changes they have undergone through time. The similarities and differences of different body structures of different organisms are checked.
Through, homologous structures where structures are similar in organisms that share the same ancestor. Example, wings of bat and wings of bird.
Through, analogous structures where structures are similar in function in different organisms. Example, fore limbs of man and monkey which are used for grabbing.
2. COMPARATIVE EMBRYOLOGY;
This is done to check embryo development in different organisms throughout time and check the similarities and differences in their development. Example, embryo of man and fish both have gills at embryo stage and in fish they develop but in man they disappear before birth.
3. FOSSILS RECORDS;
The study of fossils shows the evidence of evolution as scientists study the fossils and the development of organisms present, it displays the changes that have occured throughout the years and how other organisms share ancestors and have evolved.
4. MOLECULAR BIOLOGY;
The study of the genes of organisms to check the relationship between organisms and the changes they have undergone through time. Molecular similarities show shared ancestry of organisms. Example, human and chimpanzee share a common ancestor because they both have a gene that encodes insulin hormone.
What are centrioles and centrosomes?
Answer:
What are centrioles and centrosome?
Within the cell, a centrosome is a structure that organizes microtubules during cell division. Each centrosome contains “paired barrel-shaped organelles” called centrioles and a “cloud” of proteins referred to as the pericentriolar material, or PCM. They also enable movement of other organelles within the cytoplasm
Explanation:
Answer:
a centrosome is a structure that organizes microtubules during cell division. Each centrosome contains “paired barrel-shaped organelles” called centrioles and a “cloud” of proteins referred to as the pericentriolar material, or PCM.
Centrioles are made up of short lengths of microtubules “arranged around a central cavity.” Each centriole is around 500 nm long and 200 nm in diameter. The function of centrioles in animal cells is to organize the PCM to aid in microtubule formation.
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why are they assuming the large molecules will stay on their own side of the membrane?
Answer:
What is osmosis? Why are they assuming the large molecules will stay on their own side of the membrane? The membrane is semipermeable, so the membrane only allows some molecules through and not others. In this case, it doesn't allow the large molecules through.
Explanation:
Hope It Helps
It is assumed that the large molecules will stay on their own side of the cell membrane because the membrane is semipermeable which only allows the passage of some molecules in and out of the membrane.
What is a Cell membrane?A cell membrane may be defined as a type of biological membrane that significantly separates and protects the inner environment of all cells from the outside environment. It is semi-permeable in nature.
The cell membrane consists of a lipid bilayer that is semi-permeable. The cell membrane regulates the transport of materials entering and exiting the cell.
The ability of a molecule to travel across a membrane depends on its concentration, charge, and size. In general, molecules diffuse across membranes from areas of high concentration to low concentration. Cell membranes prevent charged molecules from entering the cell unless the cell maintains an electrical potential.
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How do the ocean waters most often provide fresh water for the Earth?
Answer:
alter precipitation and storm patterns
Explanation:
what is the first link in the pediatric cardiac chain of survival
Answer: The first link in the Pediatric Chain of Survival is the prevention of injuries, accidents, and trauma that could lead to cardiac arrest.
Explanation: found online.
the connective tissue covering an individual muscle fiber is the
Answer: Within the fasciculus, each individual muscle cell, called a muscle fiber, is surrounded by connective tissue called the endomysium.
Explain how kinetic energy affects each object as it changes its state of matter:
A) Water boiling:
B) Popsicle freezing:
C) Water condensing on the side of a water bottle:
Answer:
Explain how kinetic energy affects each object as it changes its state of matter:
A) Water boiling:
B) Popsicle freezing:
C) Water condensing on the side of a water bottle:
Explanation:
A) A water boiling will result in evaporation, therefore the particles will move extensively faster than liquid due to it being vapor.
B) A popsicle freezing is originally a solid so it'll have the least amount of kinetic energy as the particles remain fairly slow.
C) Due to the fact that water is condensing, while turning into a liquid. The water condensing on the side of the water bottle would produce a lower kinetic energy level due to the fact that it's becoming a liquid. Though liquids have higher kinetic energy than solids, as gases have a higher kinetic energy compared to liquids.
Evaporation from boiling water causes the particles to move much more quickly than they would in a liquid state.
What is Kinetic energy?A popsicle is initially a solid, it will have the least kinetic energy because the particles are still moving slowly. Because water is condensing as it transforms into a liquid.
Because it is turning into a liquid, the water that is condensing on the water bottle's side would have less kinetic energy.
Gases have a higher kinetic energy than liquids, despite the fact that liquids have a higher kinetic energy than solids.
Therefore, Evaporation from boiling water causes the particles to move much more quickly than they would in a liquid state.
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the effects of epinephrine are typically observed within
Answer:
70mins
Explanation:
i don't have one I just know
If something exhibits all of the characteristics of life, it is considered to be _____.
dead
inanimate
non-living
alive
does a woodpecker wrap its tongue around its brain
Answer:
shockingly, yes, it does
Explanation:
Having its tongue wrapped around the back of its brain doesn't just give a woodpecker somewhere to store a long appendage; it also helps protect the bird's brain from injury during high-speed pecking.
an element can be identified by its unique number of –
Answer:
Protons
Explanation:
Every element has a unique number of protons and thats what the atomic number is on an element and how they're labeled in a periodic table
How do enzymes use strain to catalyze reactions?
Answer:
Bond strain: enzymes can destabilize bonds within the substrate. Proximity and orientation: conformational changes in the enzyme upon substrate binding can bring reactive groups closer together or orient them so they can react.
Explanation:
Help fast pls
Which statement describes the process of osmosis in an animal cell?
A)
Sugar molecules move across the plasma membrane until the cell has
enough energy to
grow in size and dividel
B)
Water molecules move across the plasma membrane until solute
concentrations are equal
on both sides of the membrane.
C)
Tons move across the plasma membrane until the inside of the cell has a
higher
concentration of positive charges.
D
Enzymes move across the plasma membrane until the cell has completed
metabolism
Answer:
hi b is the correct one<3 have a good day
Explanation:
Water molecules moving across the plasma membrane until solute concentrations are equal on both sides of the membrane best describes the process of osmosis in an animal cell .
Osmosis is the process in which molecules move from a region of higher concentration to that of a lower concentration across a semi-permeable membrane.
Osmosis provides a balance between the elements in which organisms are exposed to. A very high concentration may cause cells to shrink and die hence the reason to maintain a balance for optimal functions and survival.
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whats the answer ugh
Answer:
Phalanges: long bones
Sternum: flat bone
Vertebrae: Irregular bone
100 POINTS & BRAINLIEST!!
Answer:
Biodiversity
Explanation:
The correlation between surroundings and the animals or creatures living inside an ecosystem anywhere is called biodiversityThe ship is working as a shelter for fishes.So they have started living inside and also reproducing themselves.It also shows that for food they have to come outside which is not present inwardsWhich of the following describe genes?
А.
a set of instructions encoded in mRNA
B
a set of instructions encoded in DNA
ООО
с
a set of instructions encoded in tRNA
D
a set of instructions encoded in a protein
Explanation:
A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins.
are substances made of one kind of atom.
Answer:
Substances made up of multiple types of atoms are called compounds.
The atoms themselves would be referred to as carbon atoms, oxygen atoms, if singular
What skeletal issue causes the outward curving of the spine, or a hunchback posture?
Answer:
b. Kyphosis
Explanation:
Answer:
Kyphosis
Explanation:
Which of the following would be the most likely reason some minorities may tend to underutilize therapeutic treatment? lack of transportation language barriers irregular work schedules lack of facilities in a rural location
the answer is language barriers took the test on edge 21
Answer:
B
Explanation:
Answer:
This is correct. It is B. language barriers
Explanation:
It's hard to get therapy if you don't speak the same language.
elabora un algoritmo en el cual muestres cómo se originaron las células eucariotas modernas.
Answer:
Can you translate that to english? or french
Explanation:
Who loves birds? more like wild north american birds
I do.
Though, my favorite bird would have to be a Sandhill Crane. They're elegant and fly extremely high, higher than most birds, though because some buildings are so high they get killed often(anything that flies in the jetstreams, really)
Which organ systems work together to transport substances around a plant?
A.) Roots, leaves, flowers
B.) Stems, roots, flowers
C.) Stems, leaves, flowers
D.) Stem, roots, leaves
Answer:
B.) Stems, roots, flowers
Explanation:
HELPP !!!
If a recessive trait is beneficial to an animal, what happens to the trait's proportion in the population?
It becomes more common
It becomes less common
It doesn't change much
Answer:
It becomes more common
Explanation:
Even if the trait is recessive if it is beneficial to a population then it will become more common because those with the trait are more likely to survive. For example, if a population of beetles lives on green grass and the dominant trait is for the beetles to be black and the recessive trait is green then the green ones will survive because the black beetles will be eaten first.
A day on Earth is approximately 24 hours, which is the amount of time it takes for Earth to complete one
rotation around its axis. How do the two tidal bulges created by the Moon align with the number and
frequency of tides for each coastal city??
Answer:
Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur 12 hours and 25 minutes apart. ... This occurs because the moon revolves around the Earth in the same direction that the Earth is rotating on its axis.
The two bulges created by the Moon align with the number and frequency of tides for each coastal city by the fact that the coastal cities experienced two consecutive high and low tides within the time interval of 24 hours and 50 minutes.
What do you mean by Tidal bulges?Tidal bulges may be defined as a type of natural phenomenon that significantly involves the gravitational attraction between the moon and the Earth provoking the water in the oceans which is present in a fluid state and mobile in nature.
These attributes force the water to be pulled toward the moon and stimulate the production of bulges. And due to the revolution of the earth on its axis changes the location of the water.
The process of tidal bulges accomplished the consistent revolution of the moon around the earth with respect to the rotation of the earth on its axis in the same direction.
Therefore, the coastal cities experienced two consecutive high and low tides within the time interval of 24 hours and 50 minutes.
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Which of the following do scientists think might make up dark matter? Select the three correct answers.
A. weakly interacting massive particles
B. black holes
C. gamma rays
D. massive compact halo objects
E. spiral galaxies
F. galaxy clusters
Answer:
A. Weakly.. B. Black.. D. Massive..
Explanation:
Well, I already took the quick check and got them wrong, and then got the answers for y'all
The options that scientists might think of to make up dark matter are as follows:
Weakly interacting massive particles.Black holes.Massive compact halo objects.Thus, the correct options for this question are A, B, and D.
What is meant by Dark matter?Dark matter may be defined as the type of particles that do not absorb, reflect, or emit light significantly. Due to this, they cannot be exposed by visualizing electromagnetic radiation. The materials of dark matter can not be examined directly.
According to the context of this question, dark particles considerably include weakly interacting massive particles along with the part of black holes and massive compact halo objects. Hypothetically, it is believed that approximately 85% of the matter in the universe accounts for dark matter.
Therefore, the correct options for this question are A, B, and D.
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A woman standing and watching the stars on a cool, calm night will lose most of her body heat by _____.
Answer: Not moving in the cool weather
Both amino acids and nucleotides contain
from the periodic table.
Nitrogen
O Phosphorus
Sulfur
O Boron
Will you be able to see changes in the sea floor during your lifetime?explain
Answer:
yes
Explanation:
Due to polition I will see changes for example : Coral reefs dispearing and tectonic plates revealing what they hide.
why are the offspring of asexually reproducing organisms genetically identical to their parent?
Answer: Because thear is only one parent.
Ellie loves to canoe out at Sebago Lake. One summer day she went out on the water and gave her dad a call
on her cell phone to let him know she was okay. Although she was comfortable out on the water, her dad,
back on land, was suffering tremendously from the heat. Explain why Janet felt cooler than her dad, even
though they were within a mile of each other.