Answer:
Eumelanin is black or brown pigment and pheomelanin is red or yellow pigment
what are the various speculation on the existance of life or how did life form on earth?
Answer:
In evolutionary biology, abiogenesis, or informally the origin of life (OoL), is the natural process ... For the oldest life forms, see Earliest known life forms. ... There are several principles and hypotheses for how abiogenesis could have occurred. ... In 2017 scientists found possible evidence of early life on land in 3.48 Gyo
Explanation:
Many scientists favor the RNA world hypothesis, in which RNA, not DNA, was the first genetic molecule of life on Earth. Other ideas include the pre-RNA world hypothesis and the metabolism-first hypothesis. Organic compounds could have been delivered to early Earth by meteorites and other celestial objects. We can only speculate about these questions, since we haven't yet found any life forms that hail from off of Earth. But we can think in a more informed way about whether life might exist on other ... When did life appear on Earth? ... For many millions of years, early Earth was pummeled by asteroids and other celestial objects.
Identify the phase of the moon labeled C that would be seen from the earth labeled B
Answer:
The correct answer is - a lunar eclipse (total lunar eclipse).
Explanation:
When the sun and moon align opposite one another and earth between them and blocks the light of the sun to reach the moon known as a lunar eclipse. A lunar eclipse can be a partial or total lunar eclipse.
A partial lunar eclipse occurs when a part of the earth covers the moon to get the light or between the sun and the moon. The total lunar eclipse occurs when the whole moon is opposite to the sun and earth between them.
What is something all eukaryotic cells have in common?
A.)All Cells are round
B.)All cells have a nucleus
C.)All cells have a cell wall
D.)All cells have cytoplasm
Answer:
We can immediately rule out option A, because not all cells are round. We can also rule out option C because not all cells have a cell wall. Animal cells, for instance, do not.
Can you choose more than one option? Because if so, the answers would be both B and D. All cells, no matter what type, have cytoplasm. Only eukaryotic cells have a true nucleus.
When one mineral scratches another, it is
1. a 1 on the Mohs scale.
2.softer than the mineral is scratches
3.harder then the mineral is scratches.
1.equally as hard as the mineral it scratches.
Complete the sentences. Each term may be used more than once.
a. In a circular bacterial chromosome, the structure of DNA is a____________ double helix.
b. If DNA is twisted in the_________ direction, it becomes overwound.
c. Overwinding results in____________supercoiling.
d. If DNA is twisted in the_________ direction, it becomes underwound.
e. Underwinding results in____________ supercoiling.
f. One effect of_________ supercoiling in bacterial chromosomes is to promote separation of the two strands of DNA in the double helix.
Answer:
The correct answer is -
1. right-handed
2. right-handed
3. positive
4. left-handed
5. negative
6. negative
Explanation:
In a circular bacterial chromosome, the structure of DNA is a right-handed double helix In a circular bacterial chromosome.
If DNA is twisted in the right-handed direction, it becomes overwound. Overwinding results in positive supercoiling takes place. If DNA is twisted in the left handd direction, it becomes underwound. Underwinding results in negative supercoiling.
f. One effect negative supercoiling in bacterial chromosomes is to promote separation of the two strands of DNA in the double helix
Match the organelle to its function-
questions and answers
Make assemble proteins/ ribosome
storage/ vacuole
powerhouse plant or make energy/ mitochondria
support and structure/ cytoskeleton
cleanup/ lysosome
process and transport/ Golgi apparatus and ER
create energy from sunlight/ chloroplast
control center/ nucleus
felt like I needed to do this :) hope it helps
Answer:
I seriously do not understand, you clearly know the answers. You put all of the correct matchings on your assignment. Are you trying to give free points? I am literally so confuse. Thank you for the free points, and hope you have a bless day.
Explanation:
GUYS PLEASE HURRY!! I need this finished in 20 mins :/ i missed a day. Im offering 100 brainly points
Answer:
A.
1. energy
2. nutrients
3. calories, water
4. metabolic rate
5. nutrients
6. weight and height
B.
1. protein, amino acids
2. viruses
3. carbohydrates, energy
4. fibers, glucose
5. fats
a. molecular
b. 'healthy'
Explanation:
please give me brainliest and you're welcome
Answer:
energy
nutrients
calories, water
metabolic rate
nutrients
weight and height
b. protein ____ (id)
carbohydrates, energy
fibers, glucose
fats
molecular
healthy
Explanation:
appreciate it
What do you think is the colour for happiness?
Answer:
yellow
Explanation:
Answer:
Yellow is the color of sunshine. It's associated with joy, happiness, intellect, and energy.
Explanation:
1. Which membrane-bound organelle contains the genetic material of the
cell (such as DNA)?*
O Cytoplasm
Nucleus
Mitochondria
Endoplasmic Reticulum (ER)
Answer:
Okay h
Explanation:
Which of the following sequences
(on one strand of a double stranded
DNA molecule) is likely to be a
cleavage site for a restriction
enzyme? Explain your answer.
a. CGTACC
b. ATGTCG
c. GATATG
d. TGCGCA
Answer:
✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧
Hello!
✧･ﾟ: *✧･ﾟ:* *:･ﾟ✧*:･ﾟ✧
❖ The correct answer is D) two double-stranded DNA molecules, each composed of one and one old strand. This is known as semi-conservative replication.
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~ HAZEL
Isostasy leads to isostatic adjustment if mass is redistributed. Erosion redistributes rock from the mountain to the sediment in the
basin. Which statement does NOT reflect what occurs when erosion happens?
-)))
A)
Mass increases at the crust.
B)
Less mass on the mountain causes uplift.
0
The crust beneath the mountain thins and rises.
D)
The mass of the crust decreases and the mass of the mantle increases.
Answer: It's A.
Explanation: I am doing UsatestPrep, Now I got this answer wrong, but afterwards it told me the right answer is! "Mass increases at the crust" I got the answer wrong originally because I chose B but it's actually A.
Answer:
Its A because Mass increases at the crust. . Mass is actually decreasing due to erosion of the crust, isostatic adjustment will thus, cause the mantle mass to increase over time.
Explanation:
Insulin is a hormone produced by some pancreatic cells. Scientists have isolated the DNA sequence that codes for human insulin production Which of the following best predicts the effect of inserting this gene into the DNA of a bacterial cell?
А. The recombinant bacterium will produce human insulin using its own transcription and translation machinery.
B. The recombinant bacterium will not transcribe the human insulin gene because this gene is not normally found in the bacterial genome.
C. The recombinant bacterium will transcribe the gene but will be unable to translate the mRNA.
D. The recombinant bacterium will die because it has been exposed to foreign DNA
Answer:
А. The recombinant bacterium will produce human insulin using its own transcription and translation machinery
Explanation:
This question is describing genetic engineering, which aims at producing desirable traits in organisms. In this case, the gene that encodes insulin protein in humans is inserted into the plasmid (extra-chromosomal DNA) of a bacterium. The plasmid is then inserted back into the bacterium to become a RECOMBINANT BACTERIUM.
The recombinant bacterium containing the insulin gene will produce human insulin (protein) using its own transcription and translation machinery. This genetic engineering procedure is used to mass produce insulin protein, which is administered as medicine to humans who cannot produce the protein.
Normal text Times New... 12 + B I U A ► SIE ! 31 ... 6 7 12:11 5 Organism Amino Acid Sequences Baboon Asn Thr Thr Gly Asp Glu Val Asp Asp Ser Pro Gly Gly Asn Asn Chimpanzee Ser Thr Ala Gly Asp Glu Val Glu Asp Thr Pro Gly Gly Asn Asn Lemur Asn The Ser Gly Glu Lys Val Glu Asp Ser Pro Gly Ser His Asn Gorilla Ser Thr Thr Gly Asp Gly Val Glu Asp Ser Pro Gly Gly Ala Asn Human Ser Thr Ala Gly Asp Glu Val Glu Asp Thr Pro Gly Gly Ala Asn Data Table Primate % different # of amino acids different from human Baboon Chimpanzee Lemur Gorilla Human 1. Which primate is most closely related to humans? 2. Which primate is least closely related to humans? 40 30
Answer:
dd
Explanation:
ddd
why do you think we should wear mask?
Answer:
So that we can limit the cases and keep safe :)
Explanation:
Answer:
masks slow the spread of the virus and or prevent you from catching the virus.
How would replanting trees impact the carbon cycle?
Answer:
It can reduce carbon in the atmosphere.
How does mercury change from something benign to something harmful?
Answer:
Burning coal releases mercury into the atmosphere. It falls into sediments and is converted into methyl mercury by bacteria
Explanation:
Provide a summary of what happens during DNA replication using the following words: Helicase, DNA
polymerase, Primase, Ligase, Parent strand, new strand, nucleotides, and semi-conservative model.
Answer:
Please find the summary of what happens during DNA replication below
Explanation:
DNA replication is the process by which a DNA molecule is duplicated into two identical copies. It occurs in the nucleus of the cell prior to any cellular division. The process includes:
- The double stranded DNA is first unwound by an enzyme called DNA HELICASE into a replication fork consisting of two single strands of DNA.
- Another enzyme called DNA POLYMERASE binds to the DNA and begins to add NUCLEOTIDES to each strand using complementary base pairing rule i.e. A-T, G-C. To do this, short sequences of RNA called PRIMER are synthesized by an enzyme called PRIMASE, which serves as building block for DNA polymerase to act.
- However, DNA POLYMERASE can only work in the 5'-3' direction i.e. on the leading strand which runs from 3'-5' direction. Short pieces of DNA called OKAZAKI fragments are synthesized on the lagging strand, which runs from 5'-3' direction.
- An enzyme called LIGASE joins the okazaki fragments together into a whole DNA on the lagging strand.
After the replication process which follows the SEMI-CONSERVATIVE MODEL of replication, each DNA molecule will contain one old strand called PARENT STRAND and one NEW strand.
Please help me with Q5 I’ll give brainliest!!!
Answer:
Ayo, your best answer would have to be B.
Explanation:
The skeleton muscle systems guided notes answer key
May yall please help me!!! I need help!!!
Answer the 3 boxes
#1 box=
#2 box=
#3 box=
Answer:
1 box might be offsprings
2 box might be eggs
3 box might be but or seed
(a) Describe the first interaction that triggers signaling to begin in a target cell.
Answer:
a signal molecule locks to a receptor protein (like lock and key),causes shape change in receptor then creates a specific reaction inside the cell that eventually triggers the cell response. State where signal receptors may be located in target cells.
When you eat, your blood glucose level rises. Soon after, it drops as the glucose is stored. Where does it go?
A. Brain and liver
B. Stomach and muscles
C. Stomach and liver
D. Liver and muscles
How does the hardness of a rock impact their ability to erode?
Answer:
hardness of rock impact their ability to erode by when rock is harder then it will take more time than soft rock to be eroded . it will resist it's erodness till some more time it will not crack easily
A sequence of DNA has 120 nucleotides (it is not a complete sequence).
How
many amino acids would be in the resulting polypeptide chain?
a. 120 amino acids
b. 240 amino acids
c. 40 amino acids
d. 12 amino acids
Answer:40
Explanation: a codon is three nucleotides. Provided that the sequence does not include a STOP codon, the polypeptide would have 40 amino acids
40 amino acids would be in the resulting polypeptide chain of a sequence of DNA that has 120 nucleotides.
CODONS:
A codon is a triplet nucleotide sequence in an mRNA molecule that encodes a particular amino acid. Each codon specifies an amino acid. A codon is made up of three nucleotides, whose combination determines the amino acid that is encoded. According to this question, a sequence of DNA has 120 nucleotides. This means that the number of codons that is accommodated in this sequence is 120/3 = 40 codons. Since 1 codon specifies 1 amino acid, therefore, 40 codons will specify 40 amino acids.Learn more about codons at: https://brainly.com/question/19153211?referrer=searchResults
Which statement accurately describes binary star systems?
Answer:
Which statements accurately describe binary systems?
1.have stars that might appear to wooble. 2)often have one star that is brighter than the other
I´ve done the quiz *SPOIL ALERT I ACE-IT*
Explanation:
I hope this helps
What would you look for in the geographic profile and
in the earthquake and volcano data to know if two
pieces of Earth's surface are moving toward each
other?
Answer:
You would look for there plate tectonics
Explanation:
I took the test
Earthquake, any sudden shaking of the ground caused by the passage of seismic waves through Earth's rocks.
The correct answer is tectonic plates movement
There are 7 types of tectonic plates and these are as follows:-
AfricanAntarcticEurasianIndo-AustralianNorth AmericanPacificSouth American.The scientist studies the seismography of the layers to find out the movement of the plates which lead to the earthquake.
Hence, the correct option is tectonic plates.
For more information, refer to the link:-
https://brainly.com/question/15804584
Mr. Morales is teaching a lesson on classification. He says that spiders are classified as a different group than insects because they have eight legs instead of six legs. He explains that spiders evolved first. Mr. Morales also says that having eight legs is the derived trait that separates the two groups. Antonio thinks Mr. Morales is wrong. Which piece of information is Antonio considering?
A.Spiders do not have eight legs.
B.Insects do not have six legs.
C.If spiders evolved first, six legs is the derived trait.
D.Spiders do not have derived traits, since they evolved first.
Answer: The answer is C
Explanation:
The piece of information that Antonio is considering is that if spiders evolved first, six legs are the derived trait. So the correct option is C.
What are derived traits?A trait that has been observed in a group of organisms but was not observed or was absent in the previous common ancestor of the group.
These are also the traits that are not present in the group of organisms under consideration but were observed in the previous common ancestors. This is called the secondary loss of traits.
Therefore, derived traits are not only concerned with the development of new traits but also the loss of old traits. Simplicity in a structure or function is a secondary derived trait.
Thus, because the spiders evolved before other insects, the presence of 6 legs in insects is a secondary derived trait as it represents simplicity in structure. Spiders are not derived because they are the common ancestors of the group of insects.
Therefore the correct option is C.
Read more about derived traits, here
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Please help!!!! Select the correct location on the image. In which part of the nephron does the filtration of blood occur? glomerulus distal tubule proximal tubule loop of Henle collecting duct (to ureter and bladder)
Answer:
the glomerulus filters small solutes from the blood. Almost all solutes, except for proteins, are filtered out into the glomerulus by a process called glomerular filtration.
Explanation:
Predict the method that estrogen will initiate the reception process in its cell signaling pathway.
a. Estrogen will bind to a transmembrane signal receptor that activates cell-signaling pathways.
b. Estrogen will act as a steroid signal receptor that activates ion channel proteins.
c. Estrogen will serve as a second messenger that activates cell-signaling pathways.
d. Estrogen will bind to a receptor protein that enters the nucleus and activates specific genes.
Answer:
d. Estrogen will bind to a receptor protein that enters the nucleus and activates specific genes.
Explanation:
Estrogens are small lipophilic molecules synthesized from cholesterol. This steroid hormone (estrogen) is able to directly enter into the cell nucleus to bind with their corresponding receptors. Subsequently, estrogen-receptor binding stimulates these receptors to form dimeric structures that bind to DNA and thus activate gene expression. Estrogen receptors interact with DNA and activate gene expression through zinc finger domains composed of four (4) cysteine residues surrounding a zinc atom.
Some roses have streaks of pink and streaks of red to give a striped effect to
their petals. Which inheritance pattern that you have read about today do you think
might be involved in the coloring of these roses? Explain.
Answer:
The correct answer is - incomplete dominance is the correct answer.
Explanation:
Incomplete dominance is the inheritance where there is no complete dominance takes place and where is the mix of both alleles trait mixes or blends in the offspring.
The red or purple cross with white plants flower cross the incomplete inheritance takes place to produce a striped effect to their petals.