Answer:
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In a histology lab a scientist observes the following features under the microscope. Which of these
observations supports cell theory?
I. Cardiac cells are joined by gap junctions and contain three nuclei.
II. Mature platelet cells do not contain a nucleus, but do contain mitochondria.
III. Spermatogonia undergoing mitosis.
IV. The bulk of tissue samples from endocrine glands contain cells as their main building blocks.
option III and IV supports cell theory.
The three essential concepts of cell theory are that: 1. cells are the fundamental building block of life; 2. living creatures consist of one or more cells; and 3. cells originate from preexisting cells.
Hint #2 2 / 4
In cell theory, the quantity of nuclei is not taken into account.
Hint #3 3 / 4
A new cell is produced during the process of cell division known as mitosis. This idea—that cells form from already-existing cells—is exact.
Hint #4 4 / 4
III and IV are both illustrations of cell theory in the actual world. Mitosis, which is the process by which preexisting cells divide to form new ones, demonstrates how cells make up living things, as does the cellular makeup of glands.
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How does resistance, such as pesticides resistance or antibiotic resistance, develop?
Answer:
Antibiotic resistance is a consequence of evolution via natural selection. The antibiotic action is an environmental pressure; those bacteria which have a mutation allowing them to survive will live on to reproduce. They will then pass this trait to their offspring, which will be a fully resistant generation.
Explanation:
pls help. A chicken protects their chicks by?
Answer:
yeah they sit on them to 1 keep them warm and two protection
Organisms that have very different taxonomies (e.g. are from different families) but look very similar represent an example of
One immediate cause of a decrease in the rate of photosynthesis is a reduction in the availability of
A carbon dioxide
B.
carbon monoxide
Chydrogen
D. nitrogen
Answer:
A Carbon Dioxide
Explanation:
If CO2 is not availabe photosynthesis will not take place.
Hydrogen, Nitrong and CO(carbon monoxide) are not needed at all for photosynthesis
A few minutes of incubation at room temperature in the laboratory will inactivate HIV, but the flu virus is still active after incubating for several hours. What are the practical consequences of these findings?
Answer:
Flu virus cause more infection than HIV virus.
Explanation:
The practical consequences of these findings indicates that the flu virus has more chances to cause infection in the person due to its active nature as compared to HIV virus which is inactive after incubation. This active nature of the flu virus results in the infection of more people in the world as compared to HIV patients so we can conclude that flu virus is more common than HIV virus due to its activeness.
what is information?
Answer:
Information can be thought of as the resolution of uncertainty; it is that which answers the question of "What an entity is" and thus defines both its essence and the nature of its characteristics. The concept of information has different meanings in different contexts.
HELP PPLZ. During the nitrogen cyclo, plants take in nitrogen compounds through their ___?
Answer:
Root nodules is the correct answer of this question.
Explanation:
Root nodules and nitrogen is absorbed by soil which is then absorbed by plants roots
Nitrogen is a central component of living organisms ' bodies. All proteins contain nitrogen atoms, and \text{DNA}DNA start text, D, N, A, end text.
Root nodules are located at plant roots, mainly legumes, which form a symbiosis of nitrogen-fixing bacteria.
Plants take a nitrogen compounds through root nodules.
PLEASE HELP MARKING PEOPLE AS BRAINLIST ALL DAY
Nitrogen fixation is carried out primarily by ________ with legume plants in root nodules . who live in a symbiotic relationship
A:humans
B:plants
C:bacteria
D:consumer
Answer:
Letter c po sagot
Explanation:
you welcom
Answer:
C
Explanation:
Bacteria can live in a symbiotic relationship
HELP EXTRA POITNS BRAINLIEST !!!
A group of students wants to build a ramp to move boxes from the floor up to a stage. How can the students reduce the amount of effort needed to push the boxes up the ramp?
Question 8 options:
by making the ramp as long as possible
by making the ramp’s height and length equal
by building the ramp out of a lightweight material
by covering the ramp’s surface with a soft rubber mat
If students wants to reduce the amount of effort needed to push the boxes up the ramp, it is possible by making the ramp’s height and length equal, hence option 2 is correct.
Why does it take more force to move a heavy box up a ramp?If students moves a heavy box up a ramp, there is so much friction on the undersurface of the box when going up a ramp.
To reduce the amount of effort needed to push the boxes up the ramp by making the ramp’s height and length equal, in second option by making the ramp as long as possible needs more effort.
In the fourth option, by covering the ramp’s surface with a soft rubber mat, make it harder to slide up boxes.
Therefore, by making the ramp’s height and length equal, it is easier to reduce the amount of effort.
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Exp
The mathematical formula for calculating the kinetic energy of
an object is not applicable for a gas molecule banging around
in a bottle.
Answer:False
Explanation:
Four students collected data for the average resting heart rates of 100 people. "Bpm” stands for "beats per minute.”
They then compared their data to the national average, which was 70 bpm.
Alma Patti Chase Mikayla
71 bpm 69 bpm 72 bpm 110 bpm
Which results are the least likely to be reproducible?
Alma
Patti
Chase
Mikayla
Answer:
110 bpm as that is a large outlier which is very uncommon whereas the other choices are very common in regards to bpm.
Explanation:
How is the DNA sequence AATTA replicated in a new strand during semiconservative replication?
Answer:
According to the semi-conservative DNA replication, the AATTA sequence is transcribed into a new strand as TTAAT, taking into account the complementarity of nitrogenous bases.
Explanation:
Semi-conservative DNA replication means that two molecules are obtained from a double-stranded DNA molecule, each with an original strand and a new strand.
The DNA is composed of sequences of nitrogenous bases, which are adenine (A), guanine (G), thymine (T) and cytosine (C). The bases of one chain are matched with the bases of another, according to the complementarity of nitrogenous bases, where:
Adenine is complemented with Thymine A=TGuanine is complemented with Cytosine G≡CThen, for the sequence AATTA of the strand DNA mold, the sequence on the new strand would be complementary, i.e., TTAAT.
Vincristine is a powerful breast cancer drug b. childhood leukemia drug antinausea drug d headache medicine C.
Answer:
b
Explanation:
edg 2021
Vincristine is a powerful childhood leukemia drug
What is childhood leukemia?Childhood leukemia is a disease of the white blood cells that is the most frequent type of cancer in children and teenagers. In the bone marrow, abnormal white blood cells form. They travel fast through the bloodstream, crowding out healthy cells in the process. This increases the risk of infection and other disorders in the body.What is Vincristine?Vincristine is a chemotherapeutic treatment that is used to treat specific kinds of leukemia (white blood cell malignancy), such as acute myeloid leukemia (AML, ANLL) and acute lymphoblastic leukemia (ALL) (ALL)For more than three decades, vincristine (VCR) has been regularly used to treat childhood leukemia.learn more about childhood leukemia here:
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What is the substrate of enzyme 2?
What is the substrate of enzyme 3?
What is the product catalyzed by enzyme 1?
What is the starting reactant for enzyme 3? Blank 4
Answer:
anwer is down
Explanation:
A substrate is a molecule that an enzyme reacts with. The enzyme's active site, or the location where weak bonds between the two molecules can form, is loaded with a substrate. An enzyme substrate complex is formed, and the enzyme's pressures on the substrate drive it to react and become the planned reaction's result.
While some mutations can benefit an organism, others are harmful and can lead to cancer. Which of the following best describes how mutations can cause cancer in an organism?
O Cell division becomes uncontrolled when mutations occur in genes that regulate cell division.
O Cells with mutations outnumber and consume normal cells that do not have mutations,
O A mutation can attack a cell's DNA and cause an autoimmune response in the cells.
+
O Mutations cause cells to become unable to divide and the cells die in masses, forming tumors.
Answer:
Cell division becomes uncontrolled when mutations occur in genes that regulate cell division.
Explanation:
Answer:
The answer is "A."
Explanation:
Cancer develops when the cells in the body are constantly dividing uncontrollably. In humans, cancer is often the result of a negative mutation genetically. The other answers are wrong and do not match the way cancer forms. So, A will be your answer.
Which part of the body carries out the function of copying DNA? There’s two options, heart or cells?
Answer:
cells
Explanation:
That is one of many of the cells functions.
How does removing the "overburden" during coal extraction affect the environment?
Answer: Strip mining eliminates existing vegetation and alters the soil profile, or the natural soil layers.
Explanation:
Mining disturbs and may even destroy the beneficial micro-organisms in the topsoil. Soil also may be damaged if reclamation operations mix the topsoil with subsoils, diluting matter in the surface soil.
The recombination frequency between linked genes A and B is 40%, between B and C is 20%, between C and D is 10%, between C and A is 20%, and between D and B is 10%. What is the sequence of the genes on the chromosome?
Answer:
ACDB (or BDCA)
Explanation:
The linked genes A and B have a greater frequency of recombination (40%) and therefore they are found furthest away on the chromosome. Conversely, the smaller distance is between D and B, which exhibit a lower frequency of recombination (10%), while C is localized at the same physical distance of both A and B (20%), so the physical map is ACDB.
Physical map:
A--------C-----D-----B
[ 20 ][ 10 ][ 10 ]
The sequence of the genes on the chromosome is ACDB (or BDCA).
The linked genes A and B have a greater frequency of recombination (40%) and therefore they are found furthest away on the chromosome. Conversely, the smaller distance is between D and B, which exhibit a lower frequency of recombination (10%), while C is localized at the same physical distance of both A and B (20%), so the physical map is ACDB.Physical map:
A physical map of a chromosome or a genome that shows the physical locations of genes and other DNA sequences of interest.
It can be represented as:
A--------C-----D-----B
[ 20 ][ 10 ][ 10 ]
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i think some of y'all know this so pls help me to answer this i don't have any stock knowledge
I took a photo 'cuz they said there's forbidden messesage
please help me
thank
Answer:
You got the answer
Then okay
Identify the biotic factor of an ecosystem?
Answer:
A biotic factor is a living organism that shapes its environment. In a freshwater ecosystem, examples might include aquatic plants, fish, amphibians, and algae. Biotic and abiotic factors work together to create a unique ecosystem.
Latitudinal differences in surface warming give rise to global patterns of air circulation and rainfall. At the equator and the latitudes of 60 degrees ____. At the poles and the latitudes of 30 degrees _____.
A.cold, dry air sinks; warm, moist air rises and loses moisture as rain
B.warm, moist air rises and loses moisture as rain; cold, dry air sinks
Answer:
the answer is on letter A
Explanation:
Like
Which stage of the SoulCycle involves the division of cells nucleus?
Answer:
Mitosis
Explanation:
The second stage Mitosis, It is the process in cell division where the nucleus divides into two nuclei.
Hope it helps!
FIRST ANSWER BRAINLIEST!! BIOLiOGY!! IF RIGHT!!
HOW CAN A MUTATION IN A GENE AFFECT THE TRAITS THAT AN ORGANISM HAS
Answer:
The gene will code for a different protein than it should.
Explanation:
The tRNA with the anticodon CGC should have linked at its 3 'terminal to the amino acid:
A. Leu
B. Gln
C. Val
D. Ala
Answer:
D. Ala
Explanation:
Alanine is GCG
Describe the role of wind
PLEASE HELP here is 20 points!!! And I mark brainliest!
Wind plays a significant role in the whether and the climate. It also helps plants with dispersing seeds, spores, pollen, and other forms of reproduction.
what is the domain containing all organisms with eukaryotic cells
Answer:
Domain Eukarya
Explanation:
There are only three domains; the Archaea, Eukarya, and Bacteria. Domain Eukarya came from the first prokaryotic cells billions of years ago.
In a site that contains multiple domain controllers, how long will a domain controller wait after notifying its first replication partner before sending the change notification to its next replication partner?
Answer:
3 seconds
Explanation:
3 seconds
In this kind of a situation where there exists multiple replica domain controllers that are present in the site, then the source domain controller being the one, will have to wait three seconds after issuing the first change notification. Thereafter, it then sends a change notification to the next domain controller.