Ethical Guidelines for the Use of Animals in Research
Respect for animals' dignity.
Responsibility for considering options (Replace)
The principle of proportionality: responsibility for considering and balancing suffering and benefit.
Responsibility for considering reducing the number of animals (Reduce)
In the moth species, some moths have larger spots than others. This is an example of
O mutations
O genetic variation
O commensalism
O uniformitarianism
Ribosomes, Nucleus, Chloroplast and cell membrane are all examples of_____
O Organ systems
O Organelles
O Tissues
O Unicellular organisms
Which is not an echinoderm?
A.)starfish
B.)sea urchin
C.)squid
D.)sand dollar
[tex] \large \color{red}Answer:[/tex]
Which is not an echinoderm?
A.)starfish
B.)sea urchin
C.)squidD.)sand dollar
[tex] \large \color{Blue}Explaination:[/tex]
Starfish, sea urchin and sand dollars are echinoderm.HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
Which fossil fuel is extracted from the lithosphere by mining?
A. Petroleum
B. Oil
C. Coal
D. Natural Gas
Answer:
Explanation:
Carvão espero ter ajudado
During metaphase II, do homologous chromosomes pair up as in metaphase I?
Answer:
No
Explanation:
They pair up in metaphase 1 not 2
Which function of the integumentary system is illustrated in the release of sweat? A. Absorption B. Protection C. Sensory Reception D. Regulation E. Secretion F. Both regulation and secretion
Answer:
F. Both regulation and secretion
Explanation:
Through sweat glands and superficial blood vessels, the skin is able to cool the body and regulate its internal temperature.
The eccrine sweat gland, which is controlled by the sympathetic nervous system, regulates body temperature. When internal temperature rises, the eccrine glands secrete water to the skin surface, where heat is removed by evaporation.
What is the difference between an objects structure and its function
HELP
Answer: The objects structure is like the base,the function is what its used for : >
List 3 characteristics that ALL Cells have in common
Answer:
1. cell membrane
2. contain DNA
3. ribosomes
4. cytoplasm
Explanation:
ANSWER QUICKLY!!! What phase of mitosis is shown in the picture above?
A. Metaphase
B. Anaphase
C. Telephase
D. Prophase
Answer:
B. Anaphase
Explanation:
The stage of meiotic or mitotic cell division in which the chromosomes move away from one another to opposite poles of the spindle.
The phase of mitosis which is shown below in the picture is Anaphase. During this phase, chromosomes break at centromeres.
What do you mean by Mitosis?Mitosis may be defined as a process where a single cell divides into two identical daughter cells.
Anaphase is the phase of mitotic cell division where chromosomes break into chromatids that are separate from each other and are pulled towards the opposite pole with the help of spindle fiber.
Therefore, the phase of mitosis which is shown below in the picture is Anaphase.
To learn more about Anaphase, refer to the link:
https://brainly.com/question/26912274
Every organism has a ______ number of chromosomes.
Answer:
46
Explanation:
is the answer of this quastion
HELP QUICK-Which of the following is true regarding the atoms involved in a chemical reaction?
The same number of each type of atom will always be present before and after a chemical reaction takes place.
Some of the atoms present before the reaction will always be lost during a chemical reaction.
Some of the atoms will always be changed into a different type of atom by a chemical reaction.
During a chemical reaction, atoms will always be combined into much larger molecules.
Answer:
The same number of each type of atom will always be present before and after a chemical reaction takes place.
Explanation:
A scientist is trying to classify a new organism. She observes that the organism is a microorganism. It is prokaryotic, and reproduces through binary fission. It was found living in a hydrothermal vent. What is the best classification for the organism?(1 point)
Archaea
Bacteria
Eukarya
Virus
Answer:
The correct answer is:
Archaea
Explanation:
took the test :)
Archaea is the organism that is classified by the scientist.
The correct option is A.
What is an Archaea?They are single-celled prokaryotic organisms of the domain Archaea.
They are separated from bacteria due to the difference in the composition of the cell walls.
These organisms reproduce by binary fission.
Three main groups of Archaea:
ThermophileMethanogensHalophile.Thus, the organism is A, Archaea.
Learn more about archaea, here:
https://brainly.com/question/1475001
1 point
2. A researcher adds an enzyme to a sample of human DNA to see if the
DNA changes. Which result would best support the conclusion that the
enzyme had no effect on the DNA?
The DNA has uracil bases.
The DNA has unpaired nitrogenous bases.
The DNA has a single strand with nucleotides and a sugar-phosphate backbone.
The DNA has a double helix shape with nucleotide pairs and sugar-phosphate
backbones.
Answer:
has a single strand with nucleotide and a sugar phosphate backbone
Answer:
hi
i'm not really sure but i think its the second option
Explanation:
enzymes when they are active usually hydrolyzes things
so in the second one we read that we can see unpaired nitrogenous bases
these bases are:
adenin timin citosin goanin
those are for DNA . in RNA timin is changed with uracil
so these means the hydrogen bond between them are hydrolyzed by enzyme
so we see the effect of enzyme on DNA
Ou just read an article on the Endosymbiotic Theory. Based on what you read, what is the importance of the Endosymbiotic Theory?
Answer: The endosymbiotic theory suggests that eukaryotic organisms evolve from primitive prokaryotic organisms.
Explanation:
According to the endosymbiotic theory the organelles like mitochondria and chloroplast in the eukaryotic cells have arisen from aerobic bacteria. The aerobic bacteria being prokaryotic cell was consumed by the anaerobic bacteria or prokaryotic cell.
The following are the evidences of the origin of eukaryotic organisms from prokaryotic organisms:
1. The chloroplast and mitochondria have circular DNA like bacteria.
2. The mitochondria and chloroplast reproduce through binary fission which also occurs in bacteria.
Answer:
The Endosymbiotic Theory states that the mitochondrion and chloroplasts were consumed by a cell and now depend on one another to survive. Endosymbiotic Theory helps us by giving us the technology to use forensic sciences to solve cold cases.
Explanation:
Examine the model presented here. Evaluate the size and structures associated with this cell. Which statements are accurate in their
description based on the cell type shown here? Select ALL that apply.
A)The cell lacks a nuclear membrane.
B)The cell lacks ribosomes and is likely eukaryotic.
C)The cell contains flagella and is likely eukaryotic.
D)The cell lacks mitochondria and is likely prokaryotic.
E)This is a prokaryotic cell because there are few internal cell structures.
Cells Functions and Structures
Answer:
The correct answer is - A, D, and E.
Explanation:
The following model is a model of a prokaryotic cell. It can be identified with the characteristic features of the cell and the cellular components present in this particular cell.
In this model, no nuclear envelope or membrane is present and it is present in the eukaryotes not in the prokaryotes, similarly, the other double membrane-bound organelles such as mitochondria not present in the prokaryotes.
When does mRNA editing take place?
Answer:
After transcription, some RNA molecules are altered to contain bases not encoded in the genome. Most often this involves the editing or modification of one base to another, but in some organisms can involve the insertion or deletion of a base. Such editing events alter the coding properties of mRNA.
Explanation:
hope it helps you
mark me as brainliest!!
Red-green colorblindness is an X-
linked recessive trait that
prevents the eye from
differentiating red and green
colors. Look at the pictures. What
problems could a person
experience as a result of
perceiving the colors so similarly?
Answer:
look,Examples of X-linked recessive conditions include red-green color blindness and hemophilia A: Red-green color blindness. Red-green color blindness means that a person cannot distinguish shades of red and green (usually blue-green), but their ability to see is normal.
Red-green colorblindness is an X-linked recessive disorder in humans.
What do you mean by disorder?An illness that disturbs the normal physical or mental functions of any individual.
The allele of colorblindness resides on X-chromosome, which means the male is affected with one mutant allele. while both the alleles are required to be mutant to cause the disorder in females. Another example of X-linked disorder includes Hemophilia. Red-green colorblindness reveals that an individual cannot able to differentiate the shades of red and green but occupy the normal vision.
Therefore, Red-green color blindness is an X-linked recessive disorder in humans.
To learn more about X-linked disorders, refer to the link:
https://brainly.com/question/8799684
what's the word equation for photosynthesis
Answer:
the photosynthesis equation is as follows:6CO2+6H20+(energy)-C6H1206+602
Carbon dioxide + water + energy from light produces glucose and oxygen
HI PLEASE I WOULD BE HIGHLY APPRECATED IF YOU HELP ME ON THIS QUESTION
Answer:
I would say that the sea dried up because there are fish fossils.
Explanation:
Being active at night and sleeping in burrows during the day is an adaptation of many animals living in the _____________
Felicity lists the factors that affect the shape of Florida.
Answer:
The felicity list the factors that the Humidity, Temperature, Rainfall. Explanation: In general, the "electron pairs in a molecule" which will have a shape to "maximize their distance" far apart, even the charges repel each other and also unlike charges attract.
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
HELP I NEED HELP ASAP
Answer:
Hello
ur answer is
both remove vegetation in the area, destroying habitats and increasing erosion
Explanation:
thanks
Which characteristic is most useful in correlating Devonian-age sedimentary bedrock in New York State with Devonian-age sedimentary bedrock in other parts of the world?
Complete question:
Which characteristic is most useful in correlating Devonian-age sedimentary bedrock in New York State with Devonian-age sedimentary bedrock in other parts of the world?
a. Color
b. Index fossils
c. Rock types
d. Particle size
Answer:
b. Index fossils
Explanation:
Fossils are animal and vegetable rests found in different strata of sedimentary rocks. Sedimentary layers deposit chronologically, so they are used to reflect history. They keep in each layer some of the forms of life that inhabited that area in the past. These fossils turn to be very useful while dating ages. The term Index fossils refer to those fossils that only existed in a given era or geological period during evolution.
Index fossils must:
Be easily recognizable and distinguishable from all the other fossilsHave lived in a relatively short geological periodPresent a wide geographic distributionHave lived in different sedimentary basinsAppear in different types of rocksBe abundantIn the exposed example, we are looking for a correlation between the Devonian-age sedimentary rock layers from New York with the Devonian layers of other parts of the world. This comparison is the same period (Devonian) and in places that might be far away from each other, meaning there was a wide geographical distribution of the species.
A quick evolution and extinction contribute to narrow the geological period of their existence, increasing the chronological precision. Widely distributed fossils allow geologists to establish relationships between rocks that are far away from each other.
A change in the sequence of nitrogen
bases in a gene is called a(n)
Answer:
mutation
Explanation:
A mutation is a change that occurs in copying a DNA sequence where the order of the proteins could be altered.
Calculate the population of 217 bison at the end of 2 years if it decreases at a rate of 7.5% per year. _____ bison
7.5% of 217 = 16.275
At end of 1 year bisons = 217 - 16.275 = 200.725
7.5% of 200.725 = 15.054375
At end of 2 years bisons = 200.725 - 15.054375 = 185.670625 (Rounding that to the tens)
=186
i need help. thank you
Answer:
Probably the which drink tastes better
Explanation:
I hope that helps.
Answer: The answer is C
Explanation: It does not require any sort of scientific thinking or method to solve.
what can exponential growth happen
In exponential growth, a population's per capita (per individual) growth rate stays the same regardless of population size, making the population grow faster and faster as it gets larger. In nature, populations may grow exponentially for some period, but they will ultimately be limited by resource availability.
the green house effect increases the----------of the earth
Answer:
temperature
Explanation:
it's the warmth of the earth surface but I think temperature will be ok
Hi,
The green house effect increases the temperature of the earth.
Hope it helps you...
DNA and RNA are made of what monomers? ___________________________
42. What are the 3 components of a nucleotide? ________________________________________
43. What are the elements found in nucleic acids?___________________________________
44. What are the 3 polymers for nucleic acids.________________________________________
45. What are the 2 main functions for nucleic acids.________________________________________________________________________
Answer:
42. Nucleotides are composed of three subunit molecules: a nucleobase, a five-carbon sugar (ribose or deoxyribose), and a phosphate group consisting of one to three phosphates. The four nucleobases in DNA are guanine, adenine, cytosine and thymine; in RNA, uracil is used in place of thymine
Explanation:
43.Nucleic acids contain the same elements as proteins: carbon, hydrogen, oxygen, nitrogen; plus phosphorous (C, H, O, N, and P). Nucleic acids are very large macromolecules composed of repetitive units of the same building blocks, nucleotides, similar to a pearl necklace made of many pearls.
44.polymer of nucleic acid
33 terms. The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Threose nucleic acid (TNA) is an artificial genetic polymer in which the natural five-carbon ribose sugar found in RNA has been replaced by an unnatural four-carbon threose sugar.
Consider a habitat with prairie dogs, bison, and red-tailed hawks. Another
species of hawk that eats prairie dogs, the ferruginous hawk, migrates into
the area. What effect will this change most likely have on the prairie dog and
red-tailed hawk populations?
O A. The prairie dog population will decrease, the red-tailed hawk
population will stay the same, and the bison population will
increase.
B. The prairie dog population will decrease, the red-tailed hawk
population will decrease, and the bison population will increase.
C. The prairie dog population will decrease, the red-tailed hawk
population will stay the same, and the bison population will stay
the same
O D. The prairie dog population will decrease, the red-tailed hawk
population will decrease, and the bison population will stay the
same.
Answer:
B. The prairie dog population will decrease, the red-tailed hawk population will decrease, and the bison population will increase.
Explanation:
I'm not given context; however, I am assuming that the prairie dog preys on the bison because the bison is commonly known as a herbivore.
If another predator who preys on the prairie dog is introduced, there is increased competition with the red-tailed hawks. Although this doesn't directly impact the population of red-tailed hawks, it reduces its food supply (of the prairie dog) because it is being shared, so it will have less food to grow at the optimal level.
With the increased consumption of the prairie dog, naturally, that would leave its prey; the bison, to have a lower level of predation, thereby the population increasing.