what is mass extinction?
Answer:
Mass extinction is when a lot of an animal is killed in a short period of time and is almost extinct.
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Which characteristics belong to a eukaryote?
-is usually multicellular
-contains a nucleus
-contains one cell type
-contains membrane-bound organelles
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Describe the process of digestion in written form.
Mouth. To more easily absorb different foods, your saliva helps break down what you're eating and turn it into chemicals called enzymes.
Esophagus
Stomach
Small Intestine
Large Intestine, Colon, Rectum and Anus.
The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion like the tongue, salivary glands, pancreas, liver, and gallbladder.the Digestion involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body.
Our body needs food to provide it with energy, vitamins, and minerals. However, in order use food, we must first break it down into substances that the various organs and cells in our body can use. This is the job of our digestive system. The digestive system acts in stages to digest our food. Each stage is important and prepares the food for the next stage. The entire length of our digestive system is around 20 to 30 feet! Here are the major stages of the digestive system:
1. Chewing - Chewing is the first stage of the digestive system. When you chew your food it breaks up big pieces into little pieces that are easier to digest and swallow. Also, your saliva is more than just water. It has special enzymes in it that start to break down starchy food (potatoes, bread) while you chew.
2. Swallowing - Swallowing may seem like a simple process to us. It just sort of happens. But food doesn't just fall down our throats into our stomach. First, our tongue helps to push food into the back of our throat. Then there are special throat muscles that force the food down into a long tube that leads to our stomach, called the esophagus. The food doesn't just fall down the pipe, muscles push the food along until it gets to our stomach. At the same time all this is going on, a flap blocks off our windpipe making sure food doesn't go the wrong way. We call this "going down the wrong pipe" and it can make us choke. This flap is called the epiglottis and, fortunately for us, it works automatically.
3. Stomach - The next stage is the stomach. Food hangs out in the stomach for around four hours. While the food sits there, more enzymes go to work on it, breaking down things like proteins that our bodies can use. The stomach kills a lot of bad bacteria as well, so we don't get sick. 4. Small Intestine - The first part of the small intestine works with juices from the liver and pancreas to continue to break down our food. The second part is where the food gets absorbed from the intestine and into our body through the blood.
5. Large Intestine - The last stage is the large intestine. Any food that the body doesn't need or can't use is sent to the large intestine and later leaves the body as waste.
6.The Liver and Pancreas The liver and pancreas do a lot to help the digestive system along. Both work with the small intestine. The liver provides bile (stored in the gall bladder) that helps break up fat into smaller bits. The pancreas provides additional enzymes to help digest all sorts of food. The liver also processes the digested food from your blood before it gets sent to various places in your body to be used.
What is the carbon-based product of glycolysis?
Answer:
The carbon-based product of glycolysis is pyruvate. :)
Offsprings take on traits of their parents from?
Answer:
Explanation:
Heredity, also called inheritance or biological inheritance, is the passing on of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents. ... The study of heredity in biology is genetics.
What is A layer that covers a cell's surface and surrounds the cell. It acts as a barrier between inside of
cell and cell's environment.
Answer:
membrane
Explanation:
what is science why is it so important
Answer:
Science is valued by society because the application of scientific knowledge helps to satisfy many basic human needs and improve living standards. Finding a cure for cancer and a clean form of energy are just two topical examples. ... Education could become the most important application of science in the next decades.
Explanation:
Where do plants get the nitrogen they need to create amino acids and DNA?
A. Plants get their nitrogen from nitrogen gas (N2), which moves into leaves through holes called stomata.
B. Plants take up nitrates (NO3-) from the soil and convert them into ammonia (NH3).
C. Nitrogen-fixing bacteria convert nitrogen gas (N2) into ammonia (NH3), and plants take up some of the ammonia (NH3) through their roots.
D. Both B and C are correct.
E. A, B, and C are all correct.
Answer: It is D because they get it from soil and the gas
Plants get the nitrogen they need to create amino acids and DNA - option D. Option B and option C are correct.
Plants get nitrogen which is essential to form amino acid and nucleic acid that is DNA. Plants can not get the nitrogen gas directly from the air therefore, the process called nitrogen fixation takes place.
In nitrogen fixation, atmospheric nitrogen is converted to nitrates and ammonia with the help of nitrogen-fixing bacteria.Lightning and rainstorm also assist in the fixation process.plants take up nitrate from the soil and convert them into ammoniaNitrogen gas is converted into ammonia (NH3) by bacteria, and plants take up some of the ammonia (NH3) through their roots to the shoot via the xylem.Thus, the correct answer is - option D. both B and C are correct.
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What is a centromere
. What dam that is still under construction will replace the current tallest dam?
Answer:
Oroville dam
Explanation:
A cell that has two of every kind of chromosome is ____.
a.
haploid
c.
an egg
b.
diploid
d.
a sperm
Describe the impact that DNA fingerprinting has on an individual and society
Answer:
DNA fingerprinting has had many practical uses and is extremely beneficial to our society. It can be used for learning and preventing diseases, it plays a big role in genetics, it helps for knowing a person's identity, and it can be used as evidence in criminal cases.
Explanation:
Where does stage two of cellular respiration take place?
Mitochondria
Cytoplasm
Chloroplast
Nucleus
Answer:
A, Mitochondria
Explanation:
This kind of consumer can eat a number of different things (its diet is flexible).
Answer:
Omnivore
Explanation:
An omnivore can eat plants, animals, and all sorts of things.
Hope this is the correct answer to your question.
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The table below shows the half-life of an element:
Half-Life DataElement Half-Life
Uranium-235 700 million years
Scientists have found that the Uranium-235 content of an unknown prehistoric sample was reduced to one-fourth. What best describes the identity of the sample?
A stone artifact that formed 700 million years ago
A mammoth that died 1,400 million years ago
A cliff that formed 1,400 million years ago
A plant that died 700 million years ago
Answer:
Half-Life is the time for a substance (U-235 in this case) to decay to 1/2 its original mass.
Since the problem is asking for the time for U-235 to decay to 1/2 its original mass (100 grams to 50 grams) then the decay time is 1 half-life, or 700 million years.
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Answer:
A stone artifact that formed 700 million years ago
Explanation:
By the details it is said that Uranium-235 was 700 million years old, so it would make sense for it to be stone since it is stone like.
Which of these components are found in the cells of all living organisms?
Pls help
The components that are found in the cells of all living organisms from the available options are Cytosine and Guanine.
All living cells contain important biomolecules such as lipids, proteins, nucleic acids, etc.
Nucleic acids are made of 3 major components:
pentose sugarsphosphate groupsnitrogenous basesThe nitrogenous bases could be:
purines: such as Adenine and Guaninepyrimidines: such as Cytosine and Thymine or UracilThus, by all means, no living organisms can do without possessing Cytosine and Guanine because all living organisms have nucleic acids.
More on nucleic acids can be found here: https://brainly.com/question/11737667
Answer:
C
Explanation:
what are the limiting factors of the burning bush?
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If Jethro returns to the dark movie theater to retrieve his purple jacket he would be using which property of perception?
a) Color constancy
b) Brightness constancy
c) Depth perception
d) Gestalt theory
Which category includes the terms carbon dioxide, methane, nitrous oxide, and CFCs?
solar radiation
systems
textures
greenhouse gases
Answer: greenhouse gases
Explanation:
edge 2020
Answer:
greenhouse gases
Explanation:
i got it right in the quiz Ed 2021
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What are some of the negative effects of asexual reproduction? Topic sentence 1 point Body (two or three reasons) 2 points Conclusion Sentence 1 point
Answer:
In asexual reproduction there is only one parent. The offspring are clones of the parent and each other.
The disadvantages of asexual reproduction include:
it does not lead to genetic variation in a population. the species may only be suited to one habitat. disease may affect all the individuals in a population.Explanation:
Answer:
One disadvantage of Asexual Reproduction is that organs do not receive a mix of trait from both parents. An organism that is born through Asexual Reproduction only has their DNA from the one, and only, parent. The offspring is genetically an exact replica of their parent. The child born through Asexual Reproduction could possibly look exactly like his or her parent! Cool right?
Explanation:
Hope this helps!
Which is NOT a safety guidline for traveling in a car with children.
Answer: It's the last one.
Explanation:
What are some random things that you’re too anxious to ask??
Answer: Um for me I don't really have any questions that i am too anxious to ask but some people are too anxious to ask about "why do I bite my nails," or " when people have anger problems they might ask why are so mad...
Sorry if this doesn't help... Stay safe and have a great weekend!!! :D
Answer:
Some things im to anxious to ask some people is some really weird stuff. Why? Because me and the guys do dares and really dumb stuff. Sometimes it gives me the chills and sometimes, I might not even do it. But if I don't do it, I would get punished and do really weird things. Like ding dong ditch, jumping into horse poop, etc.
Explanation:
If macro molecules are known as polymers why is each subunit known as a monomer?
why would a bacterium undergo binary fission
Answer:
To reproduce quickly in order to increase chances of survival in a habitat.
Explanation:
Thats like bacteria and mushrooms right? If yes, then think about it this way. If a tree fell and mushrooms needed to grow about on top of them.
Why is gene expression regulated?
Answer:
Often, one gene regulator controls another, and so on, in a gene regulatory network. Gene regulation is essential for viruses, prokaryotes and eukaryotes as it increases the versatility and adaptability of an organism by allowing the cell to express protein when needed.
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is a giant panda a primate
Answer:
No... it's a mammal
Explanation:
primates are monkeys
What is an accurate description of aerobic respiration?
a process that uses oxygen to break down molecules to absorb energy
a process that uses oxygen to break down molecules to release energy
a process that breaks down molecules without the use of oxygen to absorb energy
a process that breaks down molecules without the use of oxygen to release energy
Answer:
B. a process that uses oxygen to break down molecules to release energy
Explanation:
Answer:
B. a process that uses oxygen to break down molecules to release energy
What is the difference between sample count
and total count?
Answer:
A sample count is the data from a sample, or a small group. A total count would be the data from the entirety of whats being studied, not just a sample.
A lot of researchers often perform a total count or a sample count in research. The difference between sample count and total count is that a total count is done when the whole study area is surveyed but a sample count is done only when parts of the study area are surveyed.
The results obtained from those parts are used for the whole study area to approximately know the total population size.
Wildlife sampling methods often uses different methods of estimating animal numbers or densities. they are direct counts of population units, and indirect counts and indices.
Wild animals are very difficult to count as all animals are never distributed evenly within the sample area and there may be fluctuations.
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Hydrogen and oxygen gain and lose electrons when forming the molecule water
true
false
d electroniCred ca da este hidrogenul si oxigenul isi pier
Question 2
Which type of mutation can be silent, meaning the mutation doesn't lead to a different protein being synthesized.
Answer:
A point mutation
Explanation:
If a point mutation does not change the amino acid, it's called a SILENT mutation. If a point mutation changes the amino acid to a “stop,” it's called a NONSENSE mutation. Deletion and insertion may cause what's called a FRAMESHIFT, meaning the reading frame changes. I know the answer on my own, but this explaination i found on the web is better than my own