Answer:
Organelles in a cell are essentially the same as organs in an organism. The mitochondria is the powerhouse of the cell, as we all know. It creates ATP, which is what gives the cell energy. This is similar to how we consume food and create energy from it. Cell membranes are similar to skin, as they keep needed things in, and unwanted things out. Our cells need water too, as it helps create the cytoplasm. We need water to keep us alive and well, as it helps to create many of our needed bodily fluids, and rid us of toxins.
where in a stem cell of an embryo is the instructions for how to build organs?  a. ribosomes  b. endoplasmic reticulum  c. Golgi apparatus  d. nucleus
Answer:
. In the nucleus.
Explanation:
The information for all bodily functions resides in DNA in every cell.
Explain at least three ways in which a mutation in an individual's DNA could occur, and describe at least 2 effects a mutation could have on an individual's traits
Answer:
Mutations can occur from the following ways:
1. Errors that occur in DNA replication during cell division
2. Exposure to high-energy electromagnetic radiation
3. Exposure to chemicals mutagens
Effects of mutation include:
1. Genetic disorders
2. Cancers
Explanation:
A mutation is a change or alteration that occurs in the DNA sequence of a cell of an organism. These mutations can be passed on to offsprings of that organism. Mutations can occur from the following ways:
1. Errors that occur in DNA replication during cell division: during the process of cell division, the DNA in cell are copied many times. Some errors result when copying DNA, most of which are corrected during proofreading. However, some changes in the DNA sequence may not be corrected, thus resulting in a mutation.
2. Exposure to high-energy electromagnetic radiation: some types of electromagnetic radiation are ionizing, such as UV rays and X-rays. Prolonged exposure to these ionizing radiation may result in permanent damage to parts of the DNA, thereby resulting in a mutation.
3. Exposure to chemicals mutagens: mutagens are substances which are able to cause mutations. Some common chemical mutagens are alkylating agents such as ethylmethane sulfonate and N-methyl-N-nitrosourea.
Effects of mutation include:
1. Genetic disorders: in genetic disorders, certain normal functioning of the body processes are impaired. For example, hemophilia whereby blood lacks the ability to clot normally resulting in excessive bleeding.
2. Cancers: cancers occur when the cell of the body differentiate and grow abnormally. Various types of cancers include breast cancer, prostrate cancer, blood cancer etc.
Please help with this question worth 20 points
Answer:
To double its attacking power.
Explanation:
"Interaction with armed helper T cells activates the B cell to establish a primary focus of clonal expansion. Here, at the border between T-cell and B-cell zones, both types of lymphocyte will multiply for several days to constitute the first phase of the primary humoral immune response."
In raindeer black noses B are dominant over red noses b and walking domabst W over fly w. Cross 2 heterozygous reindeer ? What are the possible phenotypes and ratios?
I got BW, Bw, bW, and bw
you should be able to get all the possible traits because both of them are heterozygous.
what is the connection between mitosis and cancer
Answer:
Checkpoints
Explanation:
Cancer is essentially a disease of mitosis - the normal 'checkpoints' regulating mitosis are ignored or overridden by the cancer cell. Cancer begins when a single cell is transformed, or converted from a normal cell to a cancer cell.
Answer:
Cancer: mitosis out of control
Mitosis is closely controlled by the genes inside every cell. Sometimes this control can go wrong. If that happens in just a single cell, it can replicate itself to make new cells that are also out of control. These are cancer cells
Which event takes place first during
DNA replication
Answer:
The first step in DNA replication is to 'unzip' the double helix structure of the DNA? molecule. This is carried out by an enzyme? called helicase which breaks the hydrogen bonds? holding the complementary? bases? of DNA together (A with T, C with G)
Explanation:
Before deciding on a medium to use, what should the presenter do?(1 point)
compare the strengths and limitations of each medium
decide on the number of still or moving images they need
know the age and size of their audience
chose the form they feel most comfortable with
Answer:
♡ madeline here! ♡
- -it's c ʕ •ᴥ•ʔ
hope I could help! have a great day
✧･ﾟ: *✧･ﾟ:･ﾟ✧*:･ﾟ✧･ﾟ: *✧･ﾟ:･ﾟ✧*:･ﾟ✧
.
Explanation:
Answer:
A) Comparing the strengths and limitations of each medium
Explanation:
That's what is said on the lesson and this is 100% right!
What is natural breeding?
Answer:
Natural breeding refers to the random mating that occurs between two individuals of the same species. Conversely, selective breeding has been performed for centuries by humans hoping to produce offspring with desirable traits.
Why are fossil fuels cheaper in some places and more expensive than others?
Answer:
there could be a higher density of fossil fuels in one place, making its collection easy, where in another place, there might be a very low density of fossil fuels, making it hard to get, and therefore making it more expensive.
Explanation:
fossils aren't a blanket under the earth's crust. its spread out.
what is the diagram of 2NH3
PLEASE HELP QUICKLY! ANSWER AS MANY AS POSSIBLE. DO NOT ONLY SAY "I don't know"
1. How do we know the continents were ever connected (what evidence do we have)?
2. What does the map show about the Earth 225 million years ago ?
3. In what era was the Mesosaurus alive?
4. What animal do you think the Lystrosaurus is related to today and WHY?
Answer:
1. Wegener then assembled an impressive amount of evidence to show that Earth's continents were once connected in a single supercontinent. Wegener knew that fossil plants and animals such as mesosaurs, a freshwater reptile found only South America and Africa during the Permian period, could be found on many continents.
2. It shows that all continents started from a one large land mass. It might be named Pangea. Because people are close to each other, it's so easy to talk and talk about things not just about them but also about other people.
3.Mesosaurus, (genus Mesosaurus), early aquatic relative of reptiles, found as fossils from the Early Permian Period (299 million to 271 million years ago) in South Africa and South America.
4.The Lystrosaurus is a mammal-like animal from the early Triassic period that roamed modern day regions such as India, South Africa and Antarctica over 250 million years ago. It has tusks like an elephant and a beak similar to a turtle, and it was roughly the size of a pig.
Explanation:
hope that helps
The geologic species scale has units based on changes in rocks and fossils.
True
False
The geological time scale/species scale is divided into different units of time depending on changes in the rocks and fossils. So the statement is true.
What is the geological time scale?
The lengthy period of time that the Earth's geologic history has taken up is known as geologic time. Starting at the beginning of the Archean Eon (4.0 to 2.5 billion years ago), formal geologic time runs to the present.
The Hadean Eon, an informal time period that runs from around 4.6 billion years ago (corresponding to Earth's first creation) to 4.0 billion years ago, is also frequently included in modern geologic time scales. The period of Earth's history that is reflected by and preserved in the planet's rock layers is known as geologic time.
Events throughout Earth's history are "calendared" according to the geologic time scale. It divides all of the time into named units of abstract time known as eons, eras, periods, epochs, and ages, in declining order of duration. Those geologic time units are counted according to stratigraphy, the correlation, and the categorization of rock layers.
Therefore, the geological time scale is used for dividing different units of time according to changes in rocks and fossils. Hence the statement is true.
Read more about geological scale, here
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The measurement of how far the particles are pushed from their _______________is called amplification.
(Can somebody please help me out. I'm giving 20 points and Brainliest for the first correct answer.
limit
compression
wavelength
starting point
Answer:
i think its compression
Explanation:
...
Answer:
The anwser is the starting point hope this helps :)
Explanation:
i took the test and got it right :)
Which mutation results in the mutated DNA sequence having more or less,
nucleotides than the original?
Silent
Nonsense
Missense
Frameshift
Answer:
Frameshift
Explanation:
Mutations are randomly-occuring changes that occur within the genetic code, DNA due to errors within replication. DNA molecules are long-chain, helical macromolecules that store genetic information They are made up of varying sequences of monomers called nucleotides. which form base pairs and sequences of codons in a reading frame, which gives instructions for protein formation.
Single nucleotide polymorphisms are common, and often result in no changes in amino acids, as silent mutations. Some errors add a random nucleotide (SNP) that results in a premature stop codon, called nonsense mutation. Missense mutations are SNPs that change the sequence of codons resulting in a different amino acid.
Frameshift mutations result from insertions or deletions of nucleotides not divisible by 3. This results in more or less nucleotides needed for a codon and disrupts the reading frame- this results in a different translation of proteins
Traits is expressed even when two different alleles for the same traits are present.
What important gas do we take in when we breathe
Answer:
oxygen
Explanation:
we breath in oxygen and release carbon dioxide
hope this helps :)
WHY IS A CENTER OF A DAISY YELLOW AND ITS PETALS ARE WHITE
HELP AND ILL PUT YOU ON BRAINLIEST - THANKYOU
Answer: B
Explanation:
Answer:B
Yellow light is reflected from the center so that means it is scattered. White light (all colors) is reflected off the petals.
3) What classification of unconformity occurs when sedimentary rock overlies igneous rock?
A) disconformity
B) nonconformity
C) angular unconformity
D) conformity
Answer:
B nonconformity
Explanation:
please help ive been stuck on this problem for hours
A cell has 10% glucose outside and 2% salt inside. Describe the direction of osmosis.
1.Water will move out of the cell.
2.There will be an equal amount of water movement into and out of the cell.
3.Water will move into the cell
Answer:
1. Water will move out of the cell
- There is a higher concentration outside of the cell
Which of the following molecules are products of glycolysis? Select all that apply.
2 ADP molecules
2 NADH molecules
1 pyruvate molecule
4 ATP molecules
4 ADP molecules
Glycolysis produces 2 NADH, 2 ATP, and 2 Pyruvate molecules.
Glycolysis is the process that is described as an oxidative pathway that typically breaks down the monosaccharides including galactose and glucose molecules and is further involved in the transformation of the energy released into chemical energy which can be used by cells. The products obtained from the glycolysis are:
2 ATP which is generated via substrate-level phosphorylation2 NADH as a result of reaction named redox reactions2 pyruvate moleculesGlycolysis produces 2 ATP, 2 NADH, and 2 pyruvate molecules: Glycolysis, or the aerobic catabolic breakdown of glucose, produces energy in the form of ATP, NADH, and pyruvate, which itself enters the citric acid cycle to produce more energy.
Learn more about products of glycolysis
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How does DNA in cells determine an organisms complex traits
Answer:
DNA contains codes for proteins, which are necessary for the growth and functioning of an organism. DNA separates into long single strands that make up each part of an organism. DNA produces the energy an organism needs in order to grow.
Explanation:
15. What is meant by combustion?
Answer: D.
Explanation: Please give me Brainlest Please
The different between two molecules included the type of sugar that forms a section of the molecules and the identify of one of the four nigtrogenous bases that make up another section of the molecules. These two molecules are
Answer:
DNA and RNA
Explanation:
The difference between two molecules include the type of sugar that forms a section of the molecules and the identity of one of the four nigtrogenous bases that make up another section of the molecules. These two molecules are Ribonucleic acid and Deoxyribonucleic acid.
Ribonucleic acid contains Ribose sugar while Deoxyribonucleic acid contains Deoxyribose sugar which is the major difference between the two molecules.
I WILL GIVE BRAINLY PLEASE HURRY!!
Some towns have decided to bury their garbage to get rid of it. What is one harmful effect of this practice?
Answer:
It can put harmful substances into the atmosphere and boost climate change.
Explanation:
brainliest pls
Answer:
plants and animals habitats will be ruined and or killed off by this harmful practice
Which example has the most kinetic energy a football resting on a kicking tee a hurt football player sitting on the bench a football flying through a goal post a penalty flag on the ground
Answer:
The football flying through the goal
Explanation:
Kinetic energy is basiaclly moving energy. Since only the football going through the goal is moving, that's the one with the most kinetic energy.
The stomach is a relatively small muscular organ compared to the small intestine that can be a long as six meters
what is the average for a human piens A 2.inc B 4inc C 10 inc D 1 feet
Answer:
I'm gonna have to go with B 4 inches
Explanation:
it is B cause I'm below average and no one is longer than 10 inches
Identify the type of mutation that occurred and explain in what way it affected the protien
Answer:
The type of mutation that occurs when in the DNA strand there is a change from guanine to cytosine is a nonsense mutation, since the triplet that should encode the amino acid encodes a stop codon and the protein cannot be completely synthesized.
Explanation:
The nonsense mutation consists of a change in one of the bases of the stranded DNA, which is transcribed into an altered mRNA, producing a stop codon, instead of an amino acid.
In the table it is observed that the CCA codon is a stop codon that cuts off the protein synthesis prematurely, leaving it incomplete and probably non-functional.
Sometimes this type of mutation can alter the sequence of amino acids but the protein may be complete enough to partially fulfill its function.
What happens to red blood cells when placed in a hypotonic solution?