Radiocarbon dating uses a radioactive isotope of the element carbon to determine the ages of old objects.
Why do multicellular cells communicate together?
1. To maintain strength and shape
2. To be more organized
3. To maintain homeostasis
Answer:
I think 3 because I had the same thing but eah
PLZ HELPPPPPPPPPPPP
Answer:
you're correct
Explanation:
Answer:
楽しい時間楽しい時間楽しい時間
Explanation:
Can you help me with 1 please
Which statement best describes the evolution of hominid structure over time?
The size of the skull decreased.
O The size of the brain cavity increased.
O The shape of the head became flatter.
The shape of the teeth became more pointed.
Answer:
The size of the brain cavity increased.
Explanation:
Over the years the brain cavity got bigger and so did our brain and that is why humans are smarter
The evolution of hominid structure over time involved the increase in the size of the brain cavity.
What is evolution?Evolution refers to the gradual and cumulative changes that occurred in organisms over a long period of time which made them more complex and which they were able to transmit to their offspring.
The hominids were the ancestors of the modern day humans.
Through the process of evolution, the size of the brain cavity increased in hominids resulting in larger brains and more complexity as seen in modern humans today.
Therefore, the increase in the brain cavity of hominids occurred through the process of evolution.
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The process of water moving from the Earth to the atmosphere and back again is called the
A. Earth cycle
B. Atmosphere cycle
C. life cycle
D. water cycle
5. A logging company cut down all the large spruce trees in an area of forest. After the area was cleared, spruce seedlings began to sprout. Rabbits, birds, and deer returned to the area.
The missing part of the question is -
" Is this Primary or Secondary Succession?"
Answer:
The correct answer is - secondary succession.
Explanation:
Recolonization of the plant and animals to habitat after a major disturbance such as flood, lava eruption, wildfire, or human disturbance is characterized as secondary succession.
In this particular case, there is secondary succession occurs, there is man-made disturbance tajes place as logging company clear the spruce trees from a habitat, and after clearing the land the spruce seedlings began to sprout, birds, rabbits recolonize to the area.
What does DNA do for our bodies? 'T
DNA contains the instructions for an needed for an organism to develop, survive, and reproduce.
4. Free or low-cost apps have few of the same benefits as fitness trackers.
True
False
The given statemnet is false because Free or low-cost apps can provide many of the same benefits as fitness trackers, albeit with some limitations.Option B
Fitness trackers are dedicated devices designed specifically for monitoring physical activity and collecting data related to fitness goals. They often include features like step counting, heart rate monitoring, sleep tracking, and GPS tracking. These devices may offer a more seamless and integrated user experience, with optimized hardware and software for tracking and analyzing fitness data.
However, free or low-cost apps can offer similar benefits and functionalities, albeit with some trade-offs. Many smartphone apps are available that can track steps, monitor heart rate, record workouts, and provide guidance for various exercises. These apps can be downloaded and installed on smartphones, making them accessible and convenient for users.
While some features might be more accurate or reliable in dedicated fitness trackers due to specialized sensors, smartphone apps can still provide valuable data and insights for tracking fitness progress. They can offer personalized workout plans, track progress over time, provide reminders and notifications, and offer social features for sharing achievements and connecting with others.
Moreover, free or low-cost apps often come with the advantage of being customizable, allowing users to choose the features and functionalities that are most relevant to their specific fitness goals and preferences. They can be easily updated and expanded with new features as technology advances.
In conclusion, while dedicated fitness trackers may offer a more comprehensive and optimized experience, free or low-cost apps can still provide many of the same benefits, making them a viable alternative for individuals seeking fitness tracking capabilities.
Option B
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A woman with a straight hairline has as child with a man who is heterozygous
and has a widow's peak.
What is the mother's genotype?
Answer:
aa
Explanation:
A widow's peak is the dominant genotype so one must not have that trait. If it was presented then the woman would have the genotype.
A widow's peak is dominant so the man would be either AA or Aa. Since it stated that his is heterozygous (Hetero meaning two different), his genotype would be Aa (again since a widow's peak is the dominant, it only needs one dominant genotype)
All cells have DNA that must be replicated True or false
The answer is True.
which of the following would be produced during mitosis
Answer:
mitosis is a process of cell division in which one cell is divided into two and the two cells produced are exacty similar to the parent cell. chromosome number cell size remains same.
mitosis plays an important role in growth of organisms.
Explanation:
the scientific name of a plant includes the
a. class and order
b. genus and species
c. class and phylum
d. variety and species
Which location would u most likely NOT expect an earth quake
Location 1
Location 2
Location 3
Location 4
Answer:
Location 4
Explanation:
The closest you are to a tectonic plate, the most likely is to expect an earthquake. Note how Location 3 is over California. So, location 4 is away from the tectonic plates.
"People identify the trait they want, then only allow animals with that trait to breed
with one another.” Which of the following BEST matches the statement above?
A: industrial selection
B: Natural selection
C: Artificial selection
Answer:
I think it's A because you're deciding what you want to match or breed together
All of the following are reasons it might be beneficial for prokaryotes to take up foreign DNA EXCEPT that Question 77 options: a) DNA could be used for food by bacteria. b) the uptake of foreign DNA would result in potentially beneficial recombinants. c) the uptake of foreign DNA might allow a cell to repair damaged chromosomes. d) the uptake of foreign DNA could allow completely new genes with new functions to enter the recipient cell. e) the uptake of foreign DNA could result in the breakage of the plasma membrane of the recipient cell.
Answer:
dna could be used for food by bacteria
Explanation:
not a beneficial reason
All of the following reasons are beneficial for prokaryotes to take up foreign DNA except the use of DNA as food by bacteria. Thus, the correct option is A.
What is DNA uptake?DNA uptake is defined as the conversion of exogenous, DNase-sensitive DNA into a DNase-protected state inside a bacteria. In gram-negative bacteria, this DNA uptake can be achieved by crossing the outer membrane. By contrast, in gram-positive bacteria, DNA uptake is similar to gram-negative bacteria with passage across the cytoplasmic membrane.
The uptake of DNA in bacteria is beneficial as it helps in the production of recombinants that can be used for various purposes. The DNA uptake can be used for the repairing of damaged DNA and chromosomes in patients of genetic disorders.
New genes with different functions can be introduced in organisms like bacteria.
Therefore, the correct option is A.
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Compounds serve as the foundation for all forms of matter. True or false?
THE ANSWER IS FALSE
HOPE THIS HELPS BBBBYYYY
which list shows the phase of mitosis in the correct order
Answer: The answer is B. prophase, metaphase, anaphase, telophase
Explanation:
The area of the picture highlighted by the green square is a monomer of nucleic acids(DNA/RNA). Which of the following is the name for that monomer?
A. phosphate backbone
B. thymine
C. nucleotide
Answer:
C. Nucleotide
Explanation:
There are four types of biological molecules existing in nature. These are: carbohydrates, proteins, lipids, and nucleic acids. Nucleic acids are biological polymers made up of monomeric units called NUCLEOTIDES.
A nucleotide as depicted in the attached image is a molecule made up of three components namely; Penrose sugar, phosphate group, and nitrogenous base (adenine, guanine, cytosine and thymine). Based on the image in this question;
A represents ADENINE
S represents SUGAR
P represents PHOSPHATE GROUP
Hence, the monomer is a NUCLEOTIDE.
Meiosis consists of _________ division(s) of the nucleus.
a. one
b. two
c. three
d. four
Answer:
the answer is two for this question
Which diagram represents binary fission?
Answer:
Diagram A
Explanation:
This is because binary fission is asexual reproduction by a separation of the body into two new bodies. In the process of binary fission, an organism duplicates its genetic material, or deoxyribonucleic acid (DNA), and then divides into two parts (cytokinesis), with each new organism receiving one copy of DNA.
Point mutations resulting in a single amino acid substitution provided evidence that: Select one: A. The genetic code is a triplet code. B. The genetic code is overlapping. C. The genetic code is not overlapping. D. The genetic code is degenerate. E. tRNAs recognize codons.
Answer:
C. The genetic code is not overlapping.
Explanation:
The genetic code is nonoverlapping because each nucleotide can be part of only one codon or 'codeword' during protein synthesis. Therefore, a particular point mutation in the nucleotide sequence can result in only one amino acid modification. A nonoverlapping genetic code indicates that the same letter (i.e., the same nucleotide) can not be used for two different codons. The non-overlapping nature of the genetic code was discovered by Tsugita and Fraenkel-Conrat (1960) by observing point mutations in the tobacco mosaic virus.
A change or modification in the single nucleotide base of the genetic material is called a point mutation. It can be either addition, deletion or inversion.
The correct answer is:
Option C. The genetic code is not overlapping.
This can be explained as:
The point mutation in the amino sequence tells that the codons are not overlapping and a single nucleotide is a part of only a single type of codon.A single nucleotide can't be included in two codons.The same letters of the bases purines and pyrimidines are not a part of two different triplets.Therefore, point mutation tells that the genetic code is non-overlapping.
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A hawk eats a mouse. This kills the mouse, but it also means that the remaining mice will not have to compete as much for food with each other. Based on this information, what is the relationship between the hawk and the mouse?
A. The two organisms are in a mutualistic relationship.
B. The two organisms are in a predator-prey relationship.
C. The two organisms are in a parasitic relationship.
D. The two organisms are in a competitive relationship.
Answer:
The two organisms are in a predator-prey relationship.
Explanation
because the hawk is the predator, it ate the mouse, and th mouse was they prey, it was eaten
Answer:
B
Explanation:
The movement of glucose across a plasma membrane is achieved by
Answer:
facilitated diffusion
Explanation:
Which of these is NOT found in a bone?
A) cells
B) muscle tissue
C) blood cells
D) nerve tissue
Answer:
D. Nerve tissue
Explanation:
A geneticist is mapping the chromosomes of the newly captured gremlin. Stripe is heterozygous for three linked genes with alleles Ee, Hh, and Bb, that determine if gremlins are evil (E), have hair (H), and biting teeth (B). In order to determine if the three genes are linked, a standard testcross was done, and the 1000 offspring had the following genotypes: 48 ee Hh bb 36 ee hh Bb 400 ee Hh Bb 4 Ee Hh Bb 426 Ee hh bb 46 Ee hh Bb 38 Ee Hh bb 2 ee hh bb What is the recombination frequency between genes E and H
Recombination frequency determines if two genes are linked or if they segregate independently from each other. The recombination frequency between E and H is 8%
What are linked genes?Linked genes are those that are too close to each other in the same chromosome and they do not segregate independently.
These are the linked genes that do not exhibit an independent distribution, and they are inherited together more frequently.
What is recombination frequency?Recombination frequency can be defined as the crossing over events frequency occurring between two genes.
The value of recombination frequency indicates weather genes are linked or not. The maximum recombination frequency is always 50%.
When RF is 50% or more, we can assume that genes are not linked.
In the exposed example, we can recognize the parental gametes in the descendants because their phenotypes are the most frequent, while the double recombinants are the less frequent.
Parental)
400 ee Hh Bb
426 Ee hh bb
Double recombinant)
4 Ee Hh Bb
2 ee hh bb
Simple recombinant)
48 ee Hh bb
36 ee hh Bb
46 Ee hh Bb
38 Ee Hh bb
We will call Region I to the area between genes E and H and Region II to the area between genes H and B.
------------E------------H--------------B-----------
/---RI------//------RII-----/
To calculate the recombination frequency between E and H we just need to consider region I. We will call P1 to the recombination frequency in this region.
P1 = (R + DR) / N
Where:
R is the number of simple recombinants in this region, DR is the number of double recombinants in each region, and N is the total number of individuals.Now, let us analyze the information.
We know that individuals carrying double recombinant gametes are
Ee Hh Bbee hh bbWe know that the recessive parent from the testcross could only provide the following gametes ⇒ ehb
This leads us to assume that the followings are the double recombinant gametes from the trihybrid parent,
EHBehbSince these gametes are the product of a double recombination event in region I and II, we can assume that the parental gametes of the trihybrid individual are
eHbEhBHence the simple recombinant gametes in region I are
EHbehBNow, according to this analysis, we know that
Simple recombinants in region I
36 ee hh Bb
38 Ee Hh bb
Double recombinants
4 Ee Hh Bb
2 ee hh bb
Total number of individuals
N = 1000
Recombination frequency in Region I
P1 = (R + DR) / N
P1 = (38 + 36 + 4 + 2) / 1000
P1 = 80 / 1000
P1 = 0.08 = 8%
The recombination frequency between genes E and H is P1 = 8%
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Please :( Based on your knowledge of evolution, are humans evolving? Support your answer with factual evidence as to
why or why not
Answer:
Jesus made every one evalution is false
When Charles Darwin introduced the theory of evolution through natural selection 158 years ago, the scientists of the day argued over it fiercely, but the massing evidence from paleontology, genetics, zoology, molecular biology and other fields gradually established evolution's truth beyond reasonable doubt. Today that battle has been won everywhere—except in the public imagination. Embarrassingly, in the 21st century, in the most scientifically advanced nation the world has ever known, creationists can still persuade politicians, judges and ordinary citizens that evolution is a flawed, poorly supported fantasy. They lobby for creationist ideas such as “intelligent design” to be taught as alternatives to evolution in science classrooms. When this article first went to press in 2002, the Ohio Board of Education was debating whether to mandate such a change. Prominent antievolutionists of the day, such as Philip E. Johnson, a law professor at the University of California, Berkeley, and author of Darwin on Trial, admitted that they intended for intelligent-design theory to serve as a “wedge” for reopening science classrooms to discussions of God.
The good news is that in 2005 the landmark legal case Kitzmiller v. Dover in Harrisburg, Pa., set binding precedent that the teaching of intelligent design in U.S. public schools is unconstitutional because the idea is fundamentally religious, not scientific. The bad news is that in response, creationists have reinvented their movement and pressed on. When they lost the ability to claim that creationist ideas are valid science, they switched to arguing that they were only supporting “academic freedom.” Worse, to further obscure the religious roots of their resistance, they now push for “critical analysis” of climate change, cloning research and other scientific endeavors that they paint as culturally oppressive.Explanation:
PLEASE HELP ME OUT WITH THIS!!
they only able to get extra Nutrients frome the rain
.
What is a concept?
1.a fact that has been proven
2.the answer to a scientific question
3.an idea that can be used to talk about the world
4.a set of questions related to one topic
Answer:
an idea that can be used to talk about the world
Explanation:
helpp please !!! thanks
Answer: it would be b!
Explanation:
Expanded volcanic rock used as a soil amendment is known as _____.
A- Perlite
B- Vermiculite
C- Peat
D- Sand
Answer:
A or B
Explanation
I think it is A or B hope it helps ;-;
