Answer:
Why don't we have a complete fossil record of all life that's ever lived? Fossil formation requires a rare mix of physical and biological conditions. Fossils must be exposed at Earth's surface to have a chance of being found. Fossils can be destroyed when rocks erode, melt, or change composition.
Explanation:
For many reasons, the fossil record is not complete. Most organisms decomposed or were eaten by scavengers after death. Many species lacked hard parts, which are much more likely to fossilize. Some rocks and the fossils they contained have eroded and disappeared.
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Answer:
Sediment has to cover the bones in order for fossilization to take place
Explanation:
Fossil formation requires a mix of physical and biological conditions. Fossils have to be exposed in oder to find them too, so there might be some that are just too deep in the earth for us to find them
A wave hits a wall as shown. A brick wall with a green arrow pointing to the wall from below and right at a shallow angle. Another green arrow starts where the first arrow touched the wall and goes up and left at the same shallow angle. As the wave interacts with a wall, which kind of wave interaction is shown?
Answer:
b
Explanation:
Answer:
D. Reflection
Explanation:
Got It Right On EDGE.
If the somatic cells of a dog contain 78 chromosomes, then after mitosis the new somatic cells would contain_____ chromosomes.
GIVING BRAINLIEST! THIS LESSON IS ON CIRCULATORY SYSTEMS
LOOK AT PICTURE! BE QUICK! <3
Answer:
1-Traveling is going from one place to another different place.
Circulating is going around the same place.
2- Abnormalities such as aneurisms or an arterial malformation, an abnormal malformation of the blood vessels or any internal injury.
Explanation:
In a popular movie, a salt water fish jumped into a freshwater drain to be reunited with his father.
Using your knowledge of osmosis and solutions what would have really happened to the cells in the
fish?
А
The cells would have expanded and burst because of water entering the cells.
B
The cells would have shrunk as water left the cells.
с C
The cells would have remained the same as the freshwater is isotonic.
D
The cells would have become freshwater cells until reaching the ocean.
Answer:
A
Explanation:
fresh water is hypotonic to the fish cell,that means water will diffuse into fish cells by osmosis because a hypotonic solution contains low solute concentration.
.The water on Earth came from ancient ..
Answer:
Half of Earth's water may have come from ancient asteroid collisions Asteroid samples returned to Earth in 2010 provide new evidence of an extraterrestrial origin for half the planet's water.
Explanation:
Answer:
from god or an ice age
Explanation:
All human body cells contain 46 chromosomes. However, sperm cells in men and egg cells in women have only 23 chromosomes. This is due to meiosis. How does meiosis accomplish the reduction in chromosomal number?
Answer:
Two cell divisions after DNA replication
Explanation:
After the DNA is replicated, the cell undergoes two rounds of meiosis to produce 4 cells, each wIth 23 chromosomes. This is how the cell goes from a diploid to a haploid state.
Why are certain constellations only visible during certain
times of the year?
Answer:
orion, big and little dipper and cancer.
Explanation:
Those are my thoughts I hope this helped.
Oklahoma saw 2 tornadoes, 57 lightning strikes, 9 inches of rain, and high winds every day this week.
Is this climate or weather????
Answer:
both at this point the temperature is gonna most likely be climate change and weather is going to be the raining the tornadoes and all tht other stuff you mentioned
Explanation:
Which is the role of restriction enzymes?
to isolate the selected gene
to cut DNA into fragments of different lengths
to move and separate the strands of DNA
to join the sticky ends of DNA fragments
Answer:
to cut DNA into fragments of different lengths
Explanation:
A restriction enzyme is a protein that recognizes a specific, short nucleotide sequence and cuts the DNA only at that specific site, which is known as restriction site or target sequence.
More than 400 restriction enzymes have been isolated from the bacteria that manufacture them. In live bacteria, restriction enzymes function to defend the cell against invading viral bacteriophages. Restrictions sites in the viral genome (a "happy accident" of nature, as far as the bacteria are concerned, since they don't appear to have any specific function in the virus) are cleaved by the bacterium's restriction enzymes, fragmenting and destroying the DNA of invading bacteriophages before it can incorporate into the host's genome and take over the cell.
A bacterium is immune to its own restriction enzymes, even if it has the target sequences ordinarily targeted by them. This is because the bacterial restriction sites are highly methylated, making them unrecognizable to the restriction enzyme.
Isn't evolution fantastic?
The correct answer is option C i.e. to cut DNA into fragments of different lengths.
what is restriction enzyme?A restriction enzyme is a bacterial protein that cleaves DNA sequences at sequence-specific places, resulting in DNA fragments with known sequences on both ends.
Certain laboratory processes, such as recombinant DNA technology and genetic engineering, require the use of restriction enzymes.
There are four different types of restriction enzymes: type I, II, III, and IV, which differ principally in structure, cleavage site, specificity, and cofactors.
Both restriction and methylase functions are carried out by a single big enzyme complex in Types I and III enzymes.
The restriction enzyme is independent of its methylase in the Type II system.
Several thousand type II restriction enzymes have been identified from a variety of bacterial species.
These enzymes recognize a few hundred distinct sequences, generally four to eight bases in length.
Type III restriction enzymes are a group of endonucleases that recognize a non-pallindromic sequence, comprising two inversely oriented sites.
Type IV restriction enzymes cleave only methylated DNA and show weak sequence specificity.
hence, the correct answer is option B.
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The picture shows a model of a cell.
What is the main function of the parts labeled Xin the model?
O A. To store enzymes that break down food
B. To provide cells with energy for their activities
C. To use energy from sunlight to make sugars
D. To hold and protect the cell's DNA
Answer:
it is b: to provide energy for their activities.
Explanation:
the organelle that's labeled x is a mitochondria.
Answer: the answer is b I just got iy
Explanation:
After the 2004 tsunami disaster in Asia, there were reports that trained elephants had moved away
from the coastline before the tsunami struck. Scientists wondered if elephants had sensed the oncoming wave and the earthquake that created it. Elephant trunks have two kinds of nerve endings that are sensitive to pressure differences, but little is known about nerve ending distribution in the elephant's skin or feet. An elephant has recently died at a nearby zoo and scientists have decided
to dissect one of its feet to search for any special nerve endings. Results show a high density of pressure-sensitive nerve endings in the front of the foot and along the edges, which supports the
idea that elephants are sensing seismic signals produced by such disasters as earthquakes.
1. Independent variable
2. Dependent variable
4. Constant
5.controls
6.hypothesis
7. Sample size
8. Presence of repeated measures
Answer:
In the given dissection for the finding of the idea that elephant can sense the seismic signals generated by natural disasters are as follows:
Independent variable: it is the variable which influences the dependent variable or the dependent variable depends on. Here the area of the feet that is chosen to be dissected is the independent variable.
Dependent variable: It is the variable that is manipulated or influenced by the independent variable, in this dissection the sensitive to the pressure, nerve ending in the selected area of the feet.
Constants: It is a variable that remains constant or fixed in the complete experiment. The number of the selection area is constant hat is in one foot here.
Controls: There is no such control present in this experiment However, the density of pressure-sensitive nerve endings can be considered as control.
Hypothesis: the pressure-sensitive ending is significantly enriched in the feet of the elephant.
Sample size: subject in this study is only one elephant and one foot so the sample size is 1.
Presence of repeated measures: Repeated measures are not performed during this study is only one experiment of dissection is performed on a single subject.
Which is an example of a pioneer species? O lichens O ferns O spiders O squirrels
Answer:
lichens
hope that helps you
Answer:
Number A aahhahhha
Explanation:
in an atomic model that includes a nucleus, positive charge is
Answer: The options are not given, here are the options.
a. located in the space outside the nucleus.
b. spread evenly throughout an atom. c. concentrated at multiple sites in an atom.
d. concentrated in the center of an atom.
The correct option is D.
concentrated in the center of an atom.
Explanation:
In an atomic model, the atomic particles has the nucleus which is located at the center of the particle. This nucleus contain positive charge which is called proton at the center and the neutrons(no charge). The electrons is located out side the particle she'll or nucleus and atomic particles become neutral because the number of protons is equal to the number of electrons which is negatively charge orbiting outside the nucleus.
help pls lot of points
Answer:
I had to attach my response, as Brainly wrongly marked it as profane. I hope this helps!
I_11) WHICH THREE ELEMENTS ARE FOUND IN ORGANIC COMPOUNDS
A) C,H,O
B) C, H, Ne
C) N, H,
ĐÀ N, C#, Ph
Answer:
a) CHO
Explanation:
Usually its four elements: hydrogen, carbon, oxygen and nitrogen, are the major components of most organic compounds
what type of rock is this?
It's Sedimentary and the name of the rock is Conglomerate
3. How does oxygen cross into the cell?
Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
The oxygen cross into the cell as water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion has been one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
What is osmosis?
Osmosis has been the process in which molecules of the solvent pass via a semipermeable membrane from a lower concentrations to higher concentration or from less concentrated solution to high concentrated solution. In the process of the osmosis movement of the water takes place.
There are mainly three types of the osmosis and these are hypertonic, hypotonic, and isotonic. The process of osmosis has been passive transport as water moves from low solute concentration to high solute concentration.
Osmosis has been also known as diffusion of water or solvent via a membrane which allows only selective substance to go across the channel. The process of osmosis does not require ATP because it is a passive process.
Therefore, The oxygen cross into the cell as water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion has been one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
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A radioactive substance has a half-life of 1.25 million years. What is the age of a rock in which 6.25% of the original radioactive atoms remain? 5 million years old 6.25 million years old 3.75 million years old6 2.5 million years old 1.25 million years old 625 thousand years old
Answer:
The age of the rock is 5 million years
Explanation:
Fraction of radioactive substance remaining = 6.25% = 625/10000 = 1/16
Number of half-lives undergone by the substance to leave behind 1/16 of the original sample
1/16 = (1/2) * (1/2) * (1/2) *(1/2)
Therefore, the substance have decayed 4 times
One half=life = 1.25 million years
Four half-lives = 4 * 1.25 million years = 5 million years
Therefore, the age of the rock is 5 million years
Look at Diagram 1.The boxed structure is called a/an-
A. DNA molecule
B.nitrogenous base
C.nucleotide
D.base pair
Why is organic food better and healthy?
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what do you think is a way for geologist to locate ore bodies? justify your answer
Answer:
Explanation:
what do you think is a way for geologist to locate ore bodies? justify your answer
From my research, there is lots of information on how to extract ore, but I can't find any information on how these ore deposits are found in the first place, apart from 'looking for surface formations'. So, what kind of formations would exist for different types of ore? Are there any other ways of finding ore?
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how can a small change in energy use make a significant difference in CO2 emissions
Answer:
⬇️
Explanation:
small changes in energy use like switching to water & wind based systems can reduce carbon pollution and create a better energy creating source.
Which of these best describes air pressure?
a
b
amount of pressure exerted in the atmosphere due to the movement of earth
amount of pressure exerted by dust particles in the atmosphere
amount of pressure caused by volcanoes and wildfires in the atmosphere
amount of pressure in the air caused by gravity and matter moving on all objects
h
Od
Question 2 (1 point)
Answer:
it would be (d) amount of pressure in the air caused by gravity and matter moving on all objects
Explanation:
d. amount of pressure in the air caused by gravity and matter moving on all objects.
Air pressure:The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. As the pressure decreases, the amount of oxygen available to breathe also decreases. Atmospheric pressure is an indicator of weather.Thus, the correct statement that describes air pressure is the amount of pressure in the air caused by gravity and matter moving on all objects i.e. option d.
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Which mineral is present is banana?
Answer:
Potassium
Explanation:
They are packed with potassium, a mineral electrolyte that keeps electricity flowing throughout your body, which is required to keep your heart beating. Bananas' high potassium and low sodium content may also help protect your cardiovascular system against high blood pressure,
HOPE THIS HELPS
PLZ MARK BRAINLIEST
correctly describe pH of a solution?
what animals can be used to replace human parts?
cattle
sheep
goat
pig
Answer:
Pig
Explanation:
Pig valves are already used successfully in heart transplants. Human-to-human organ transplantation has only been around since the 1950s, and scientists have been working on animal-to-human transplants for almost that long. In the '60s, Keith Reemtsma experimented with transplanting chimpanzee kidneys into humans.
Answer:
Pig
Explanation:
This process is called Xenotransplantation. The animal organ, probably from a pig or baboon could be genetically altered with human genes to trick a patient's immune system into accepting it as a part of its own body. (Wikipedia)
Which protects nerve endings at the ends of fingers and toes?
joints
hair
nails
muscle
Answer:
nails ez pe ze
Explanation:
edg 2020 and i smart
Answer: C
Explanation:
match each biome with the correct description.
1. driest biome
2. largest biome
3. most species
4. least species
5. four seasons
6. used to grow crops
- rainforest
- tundra
- desert
- coniferous forest
- temperature deciduous forest
- grasslands
Answer:
Rain forest: Most species
Tundra: Least species
Dessert: Driest Biome
Coniferous Forest: largest biome
Temperate Decidious Forest:
Grasslands: Used to grow crops
Explanation:
Match each biome with the correct description.
Desert - The driest biome.Taiga or boreal forest - The largest biome.Rainforest - The biome with the most species.Tundra - The biome with the least species.Temperate deciduous forest - The biome with four seasons.Grasslands - The biome used to grow crops.What is Biome?A biome is a large, recognizable geographic area that is home to a variety of ecosystems and communities of plants and animals that have evolved in a particular environment, including climate, soil, and topography. Temperature, rainfall, altitude, latitude, and the types of plants that grow there are used to identify biomes.
Aquatic biomes such as tundra, taiga or boreal forests, temperate deciduous forests, tropical rainforests, grasslands, savannas, deserts, and marine and freshwater habitats are just a few of the primary categories of biomes. Each biome has a different set of traits and characteristics that influence the types of plants and animals found there.
Therefore, match each biome with the correct description.
Desert - The driest biome.Taiga or boreal forest - The largest biome.Rainforest - The biome with the most species.Tundra - The biome with the least species.Temperate deciduous forest - The biome with four seasons.Grasslands - The biome used to grow crops.Learn more about Biome here:
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what does a cat eat
Answer:
meow mix
Explanation:
meow mix is a natural cat food mix for all breeds.
