Answer:
Chromosomes compress, thicken, shorten, and become more apparent during prophase. At the centromere, chromosomes appear as two sister chromatids fused together. Chromosomes line up on the equator during metaphase.
what happens when spyrogyra is placed in saline water?
The half-life of potassium-40 is 1.3 billion years. If a rock specimen contained 1g of
potassium-40 when it was formed, how much potassium-40 would be left if the rock is 2.6
billion years old?
Answer:
2.6 billion years
Explanation:
There are essentially two ways of solving nuclear half-life problems. One way is by applying the half-life formula, which is
A
(
t
)
=
A
0
(
t
)
⋅
(
1
2
)
t
t
1
2
, where
A
(
t
)
- the quantity that remains and has not yet decayed after a time t;
A
0
(
t
)
- the initial quantity of the substance that will decay;
t
1
2
- the half-life of the decaying quantity;
In this case, the rock contains
1/4th
of the orignal amount of potassium-40, which means
A
(
t
)
will be equal to
A
0
(
t
)
4
. Plug this into the equation above and you'll get
A
0
(
t
)
4
=
A
0
(
t
)
⋅
(
1
2
)
t
t
1
2
, or
1
4
=
(
1
2
)
t
t
1
2
This means that
t
t
1
2
=
2
, since
1
4
=
(
1
2
)
2
.
Therefore,
t
=
2
⋅
t
1
2
=
2
⋅
1.3 = 2.6 billion years
A quicker way to solve this problem is by recognizing that the initial amount of the substance you have is halved with the passing of each half-life, or
t
1
2
.
This means that you'll get
A
=
A
0
2
after the first 1.3 billion years
A
=
A
0
4
after another 1.3 billion years, or
2
⋅
1.3 billion
A
=
A
0
8
after another 1.3 billion years, or
2
⋅
(
2
⋅
1.3 billion
)
Cellular respiration concept map
Answer:
This cellular respiration concept map from Byjus might help you.
Explanation:
What do you think the cardinal is trying to communicate with its song?
Answer:
I think the cardinal is trying to communicate courtship for the first and third song, while it is trying to communicate territorial with the second song.
Explanation:
hope it's help
Which feature of a human community is similar to a habitat in a biological community?
A. A person's job
B. Interdependent communities
C. Individual interests
D. The street on which a person lives
Apxx
Jobs is the human community niche that most closely resembles a biological community.
What is Biological Community?Each ecological species has a certain role to play within the biological community. In order for species and organisms to live and grow, each species must contribute in some way.
Jobs play a significant role in human societies and wellbeing. Every job, from CEOs to fast food employees to janitors, is crucial.
Everybody contributes to the survival of businesses, and occupations enable employees to make money. The earnings are reinvested in the community to support its survival and growth.
Therefore, Jobs is the human community niche that most closely resembles a biological community.
To learn more about Community, refer to the link:
https://brainly.com/question/22558440
#SPJ1
What is basal cell carcinoma and what does it look like?.
Answer:
Basal cell carcinoma is a type of skin cancer that most often develops on areas of skin exposed to the sun, such as the face. On brown and Black skin, basal cell carcinoma often looks like a bump that's brown or glossy black and has a rolled border. Basal cell carcinoma is a type of skin cancer.
Using the Internet, local newspapers, and/or any regional information, write a 600 word report on one of the following companies:
Coca-Cola ®
McDonald's ®
ServiceMaster ®
Southwest ® Airlines
Give some of the reasons for their success in the business world. Do they emphasize friendliness? How does management treat workers? How does the company handle complaints?
You may want to give a local representative a phone call or e-mail and ask for some further information.
My report is on the Coca Cola company.
How did Coca-Cola begin?Coca-Cola began in 1886 when the Atlanta pharmacist, Dr. John S. Pemberton create a distinctive tasting soft drink that could be sold at soda fountains.
How coca cola became famous?By the late 1890s, Coca-Cola was one of America's most popular fountain drinks due to Candler's aggressive marketing of the product. The Coca-Cola Company increased sales by over 4,000 percent between 1890 and 1900.
How coca cola became successful?One of the reasons that Coca Cola brand is so successful is that it has focused on building its brand, instead of its product. It creating an idea of what life with Coke is like rather than its taste.
The reasons for their success in the business world are unique taste, better quality and advertisement. The company handle complaints by lanuching customer service center where the complainants register their complaints and the company will act accordingly.
Learn more about company here: https://brainly.com/question/24553900
3. DNA Replication has many key players! These are just a few of the major key player enzymes. In your own words,
describe each of their functions in DNA replication.
Helicase:
DNA Polymerase:
Primase:
Ligase:
Select Your Character
180
Drimas
Ligase
The functions of the few major key player enzymes in DNA replication include the following:
Helicase - They unwind the double stranded DNA to allow each strand to be copied.DNA Polymerase - It catalyzes the synthesis of double-stranded DNA molecule being copied into two identical DNA molecules.Primase - They are responsible for assembling on each template strand a short RNA primer that is extended with deoxynucleotides by the replicative DNA polymerase.Ligase - They catalyze the joining of DNA strands.What is DNA?This is known as Deoxyribonucleic acid and carries genetic instructions in all living things.
Its synthesis is catalyzed by enzymes such as those listed above with their appropriate functions.
Read more about DNA here https://brainly.com/question/16099437
PLEASE HELP WITH THIS
Answer:
by operating
Explanation:
this by opearating and remove the area tha cancer occur
True or false? DNA is found in both prokaryotic and eukaryotic cells.
Answer: True
Answer:
True DNA is found in both
Explanation:
Hope this helps
What is the difference between chromosomal DNA and Plasmid DNA?
Answer:
chromosomal DNA is larger than plasmid DNA
Different________show very different characteristics or variations, however you can also have_______within the same species.
A. Evolutionary animals, major differences
B. Species, variation
C. Animals, subspecies
D. Evolutionary animals, subspecies
Mendel's experiments discovered that one parent's trait disappeared in the F1 generation, only to reappear in one quarter of the F2 generation. Which of the following best explains this pattern of inheritance?
A) A sperm or egg carries only one allele for each inherited trait because allele pairs segregate during gamete production.
B) There are alternative forms of genes that account for variation in inherited characteristics.
C) If the two alleles of an inherited pair differ, then one determines the organism's appearance and is the dominant allele.
D) For each characteristic, an organism inherits two alleles, one from each parent.
The statement that best explains the pattern of inheritance described above is that if the two alleles of an inherited pair differ, then one determines the organism's appearance and is the dominant allele (option C).
What is an allele?Allele is the alternative form of the same gene occupying a given position, or locus, on a chromosome.
According to Gregor Mendel in his law of inheritance, he deduced that genes come in pairs and are inherited as distinct units, one from each parent. Mendel tracked the segregation of parental genes and their appearance in the offspring as dominant or recessive traits.
Dominant alleles are alleles that are physically expressed while the recessive alleles are those that are masked by the dominant alleles.
According to this question, Mendel discovered that one parent's trait disappeared in the F1 generation of his experiment, only to reappear in one quarter (¼) of the F2 generation.
This is as a result of the concept of dominance or recessiveness in the allele encoding the particular trait. The dominant allele expressed itself over the recessive one in the F1 generation.
Learn more about inheritance at: https://brainly.com/question/4520267
#SPJ1
Which virus is named after the organism it infected?
ICTV announced “severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)” as the name of the new virus on 11 February 2020. This name was chosen because the virus is genetically related to the coronavirus responsible for the SARS outbreak of 2003.
Answer:
Severe Acute Respiratory Syndrome coronavirus 2
Explanation:
(SARS-CoV-2) was announced by International Committee on Taxonomy of Viruses as the name of the new virus on 11/02/2020. The name was chosen because the virus is genetically related to the coronavirus responsible for the SARS outbreak of 2003.Although the two viruses are related, they are different.
differences between the three classes of platyhelminthes
Answer:
The phylum Platyhelminthes consist of three different classes: Turbellaria, Cestoda and Trematoda. Class turbellaria is composed of many free-living organisms, while some are parasitic. Trematodes are commonly known as flukes. They are parasitic flatworms with an unsegmented body.
Explanation:
The three classes of Platyhelminthes are Turbellaria, Cestoda, and Trematoda.
What are the differences between the three classes of Platyhelminthes?Flatworms are members of the Platyhelminthes phylum. The Turbellaria, popularly known as planarians, the Trematode, usually known as flukes, and the Cestoda, also known as tapeworms, are the three classes that make up the phylum Platyhelminthes. Flatworm species come in more than 25,000 different varieties.
The four classes of Platyhelminthes are Cestoda (tapeworms), which are internal parasites of many vertebrates; Trematoda (internal parasites of humans and other species); and Turbellaria (free-living marine species).
Thus, these are the differences between the three classes of platyhelminthes.
Learn more about platyhelminths, here:
https://brainly.com/question/14793366
#SPJ2
Examine the words and/or phrases below and determine the relationship among the majority of words/phrases. Choose the option that does not fit the pattern.
A. ash
B. dissolved gases
C. silica content
D. temperature
The only word among the available words that do not fit the pattern would be temperature.
Words and relationshipAsh, dissolved gases, and silica content are similar in the way that all of them are made up of matter.
Matter refers to any substance with weight and is able to occupy space. Ash is made from solid particles. dissolved gases are gases, and silica contents are also from solids.
Temperature, on the other hand, is a scalar quantity. It is not something that can be held or seen. It has no weight and neither does it occupy space.
More on matter can be found here: https://brainly.com/question/4513444
name the diseases that is caused by in lack of vitamin C,D and iodine
Answer:
Scurvy
Explanation:
Severe deficiency, called scurvy, causes bruising, gum and dental problems, dry hair and skin, and anemia. The diagnosis is based on symptoms and sometimes blood tests.the autonomic nervous system controls
A. tying your shoes
B. Heart Rate
C. chewing a bite of food
D. using a fork
The answer will be :
B. Heart Rate
Which is NOT an example of leaves humans commonly eat?
Spinach
Zucchini
Kale
Field greens
Answer:
zucchini
Explanation:
please give me your answer please please please please please please
Answer:
Movement.
Reproduction.
Respiration.
Responsiveness.
Excretion.
Adaptation.
All organisms have nucleic acid as the hereditary molecule.
All organisms show adaptation, which occurs at the individual level and is tightly related to homeostasis.
the peripheral nervous system includes
A. All Nerves outside the central nervous system
B. the Brain and the spinal cord
C. the spinal cord and all of the nerve
D. all of the nerves contained within the body
Answer:
A.
Explanation:
The PNS consists of the nerves and ganglia outside the brain and spinal cord.
11
12
13
14
15
16
17
18
19
20
Air pollution affects everyone equally.
Please select the best answer from the choices provided
OT
OF
Answer:
16
Explanation:
Air pollution affects everyone equally is true statement.
What is Air pollution?When pollutants are released into the atmosphere, they endanger both human health and the health of the entire planet. The World Health Organization (WHO) estimates that air pollution causes close to seven million deaths worldwide each year.
Currently, nine out of ten people breathe air that contains more contaminants than the WHO's recommended levels, with those in low- and middle-income nations suffering the most.
The 1970-established Clean Air Act gives the U.S. Environmental Protection Agency (EPA) the power to protect public health by controlling the emissions of certain dangerous air pollutants.
Therefore, Air pollution affects everyone equally is true statement.
To learn more about Air pollution, refer to the link:
https://brainly.com/question/18951513
#SPJ7
Natural gas drilling locations are determined by
a random drilling
b. seismic surveys
C. natural gas dogs
d satellite surveys
Answer:
The answer is b. seismic surveys.
Answer:
B - SEISMIC SURVEYS
Explanation:
The earth is sometimes described as a giant magnet. True or false?
Which of the following muscles are used when breathing?
O A) Interosseous and the diaphragm
B) Intercostal and the diaphragm
C) Intercostal and pectoral
D) Interosseous and pectoral
The cellular machinery responsible for protein synthesis is the:.
Explain the characteristics scientists use when observing organisms and placing them in six kingdoms
Answer:
Classification of organisms is done while considering many factors such as:
Cell type- whether the organism is prokaryotic or eukaryotic
Cell structure- This includes both the presence and composition of the cell wall
Body type- whether the organism is multicellular or unicellular
Mode of nutrition- the method through which the organism achieves its nutritional requirement, by consuming other organisms (heterotroph) or making its own food (autotroph)
Explanation:
i beleve this is what you where asking :)
Which statement best describes the motion of the toy vehicle during the first 30 seconds of the
investigation?
Answer:
kinetic energy
Explanation:
if something is moving that means its kinetic if its still its potential
What are the impacts of genomic era on microbial phylogeny systematics
provide a platform for current research on archaea, bacteria, microbial eukaryotes and viruses.
What is the great pacific trash gyre?
Answer:
The Great Pacific garbage patch (also Pacific trash vortex) is a garbage patch, a gyre of marine debris particles, in the central North Pacific Ocean. It is located roughly from 135°W to 155°W and 35°N to 42°N.