Answer:
A checkpoint is one of several points in the eukaryotic cell cycle at which the progression of a cell to the next stage in the cycle can be halted until conditions are favorable. ... The G2 checkpoint ensures all of the chromosomes have been replicated and that the replicated DNA is not damaged before cell enters mitosis.
A mutation in a tumor suppressor gene may stop a cell from checking things during the cell cycle.
Tumor suppressor genes are normally expressed genes that control the progression of a cell through the cell cycle.These genes (tumor suppressor genes) act to repair mutations that occurred during DNA replication, slow down cell division, activate programmed cell death pathways (i.e., apoptotic pathways, etc).For example, p53 is a tumor suppressor gene capable of controlling cell division rate by keeping cells from proliferating in an uncontrolled manner.In consequence, mutations of the p53 gene are often observed in cancer cells that lost their ability to regulate the rate at which they grow.In conclusion, a mutation in a tumor suppressor gene may stop a cell from checking things during the cell cycle.
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which reproduction uses non reproductive plants of a plant to produce new plants
Answer:
Vegetative propagation
Explanation:
Vegetative propagation does not require seeds or spores. Instead, offspring grow from a part of the parent plant.
What is the formula for work when power is present?
Answer:
below
Explanation:
Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s)
A student examines a thin section of an onion-root tip and records the number of cells that are in each stage of the cell cycle. She observes 93 cells in interphase, 15 cells in prophase, 4 cells in metaphase 6 cells in anaphase and 2 cells in telophase. If the complete cell cycle in an onion-root tip cell requires 24 hours, what is the average duration of each stage in cycle?
Answer:
given:
Total number of cells in all stages = 93+15+4+6+2 = 120
Total time = 24 hours.
solution:
Percentage of cells in interphase
= 93 * 100 / 120 = 77.5%
in prophase
=15 * 100 / 120 = 12.5%
in metaphase
= 4 * 100 / 120 = 3.33%
in Anaphase
= 6 * 100 / 120 = 5%
in telophase
= 2 * 100 / 120 = 1.66%
The percentage of cells present in various phases exhibits the time spend by each cell in that phase.
Total minutes
= 24*60 = 1440
Total minutes spent in interphase
= 77.5 * 1440
= 1116 minutes
in prophase =12.5 *1440
= 180 minutes
in metaphase = 3.33*1440
= 48 minutes
in Anaphase = 5*1440
= 72 minutes
in telophase = 1.66*1440
= 24 minutes
i need help with biology if you’re willing to help pls lmk :)
Answer:
sddssa
Explanation:sa
Hello! Any help would be much appreciated
Answer:
A double helix shape of DNA
Explanation:
100 pt questions biol
Answer:
1. Cellular
2. Photosynthesis
3. Photosynthesis
4. Cellular
Explanation: B.
Answer:
Office Equipment & Supplies. Orchestrated by CDW. To ensure your business operates smoothly, you need a steady supply of office basics. Whether it's a ...
Explanation:
I need a small text (about 50 words) for the human brain.
Answer:
The human brain is the command center for the human nervous system. It receives signals from the body's sensory organs and outputs information to the muscles. The human brain has the same basic structure as other mammal brains but is larger in relation to body size than any other brains.The largest part of the human brain is the cerebrum, which is divided into two hemispheres, according to the Mayfield Clinic. Underneath lies the brainstem, and behind that sits the cerebellum. The outermost layer of the cerebrum is the cerebral cortex, which consists of four lobes: the frontal, parietal, temporal and occipital. [Nervous System: Facts, Functions & Diseases]
Like all vertebrate brains, the human brain develops from three sections known as the forebrain, midbrain and hindbrain. Each of these contains fluid-filled cavities called ventricles. The forebrain develops into the cerebrum and underlying structures; the midbrain becomes part of the brainstem; and the hindbrain gives rise to regions of the brainstem and the cerebellum.
Explanation:
how you can play your role to overcome the waste issue in your area?
(giving brianliest with extra points)
Answer:
Recycle and throw away approprite trash
Explanation:
Recycle and throw away appropriate trash.
If the carrot population increased, the rabbit population would:
NO LINK ANSWERS
A. increase
B. decrease
C. remain the same
Answer:
The rabbit population would remain the same as the increase in number of carrots doesn't determine / effect the population of rabbits.
Hope my answer helps !
Answer:
i believe the answer is c) remain the same
Explanation:
i say this because food availability wouldn't necessarily cause the population to grow (there would need to be an environmental change for this to happen.)
and the population wouldn't decrease because there would be an abundance of food and since starvation is one of the main causes of population decrease (along with over-crowding.)
good luck :)
i hope this helps
**please let me know if this was incorrect**
have a nice day!
What are some potential solutions to the problems Pavan identifies?
Answer:
below
Explanation:
Waste disposal; We need to recognize the benefits of nature and start preserving nature.
If a recessive trait is expressed in an organism’s phenotype, what can you determine about its genotype?
a. Both alleles in the genotype are recessive.
b. At least one allele in the genotype is recessive.
c. You cannot determine anything about the organism’s genotype.
d. Both alleles in the genotype are dominant.
which involves producers, consumers, and decomposers?
the water cycle
nitrogen fixation
evaporation
the carbon and oxygen cycles
How do dendrites help the function of nerve cells? (1 point) 0 They help the neuron receive messages from the dendrites of another neuron. They help the neuron receive messages from the axon of another neuron. They help the neuron block messages from the dendrites of another neuron. They help the neuron block messages from the axon of another neuron.
Answer:
Explanation:Dendrites are the segments of the neuron that receive stimulation in order for the cell to become active. They conduct electrical messages to the neuron cell body for the cell to function
Explanation:
?
Black fur (B) is dominant and white fur (b) is recessive in mice. What are the possible offspring of two black mice (Father = Bb and Mother = Bb) bred together? Think of Mendel's F2 generation.
Answer:
BB, Bb, Bb, bb
Explanation:
by performing a punnet square you will see that these are the possible outcomes. if you need me to go into more detail I will try my best to list the genetic makeup below:
BB: 25%
Bb: 50%
bb: 25%
White: 25%
Black: 75%
What is the answer to this?
Answer:
1.84 × [tex]10^{8}[/tex]
Explanation:
(2.0 × [tex]10^{8}[/tex])-(1.6 × [tex]10^{7}[/tex])
we need to make the powers the same in order to minus
(2.0 × [tex]10^{8}[/tex])-(0.16 × [tex]10^{8}[/tex]) →1.84 × [tex]10^{8}[/tex]
Chapter 1 Question: Why didn't the plants and animals in the biodome have
enough energy storage molecules?
GVC – Understand how humans depend on and affect natural resources.
Learning Targets:
ESS4.1 – Construct an explanation for how the availability of natural resources, the occurrence of natural hazards, and changes in climate affect human activity.
ESS4.2 – Use computational thinking to explain the relationships between the sustainability of natural resources and biodiversity within a system.
ESS4.3 – Design solutions for developing, managing, and utilizing energy and mineral resources based on cost benefit rations on large and small scale
ESS4.4 – Design solutions for a major global or local environmental problem based on one of Earth’s systems.
Answer:
Hope It Help
Explanation:
That's all I know
Drag each graph to the correct location on the image.
Match the graphs of the skier's potential energy and kinetic energy with the skier's position on the hill.
What you have in the picture is correct. :>
Explanation:I took the test and the correct answer is what you have. :>
Answer:
you got it right!!
Explanation:
i just took the test.
HELPPPPP ME PLS lol lol lol lol
Answer: 1. chemical weathering
2. mechanial weathering
3. Chemical weathering
4. I believe mechanical??
If theses are not right, I'm sorry for the wrong answers
Explanation:
Answer:
I dont even know-
Explanation:
Can someone plz help
Answer:
i think it may be c because it makes more sense than the others
Explanation:
The Rio Grande River separates Mexico from Texas.
What most likely created the riverbed?
A.glaciers
B.plate collisions
C.volcanoes
D.water erosion
Answer:
d I think or b?
Explanation:
water could cause it to form a river and spread over time
HELP AGAIN
askjcnoianlkscnoxicn
Answer:
a hope it helps make brainlliest ty
Explanation:
make free póínts again please
I NEEEEEDDDD HELP PLEASE
Answer:
Proteins.
Explanation:
Genes contain instructions to assemble amino acids in proteins.
What prevents a lake or ocean from freezing solid?
Answer:
The surface layer of the water freezes solid creating a barrier that insulates the ice below so that it keeps a steady temperature usually a few degrees above freezing (32 degrees).
Explanation:
3. What is a type of asexual reproduction that com-
monly occurs in many species of unicellular pro-
tists? (1) external fertilization (2) tissue regenera-
tion (3) binary fission (4) vegetative propagation
Answer:
In fission (or binary fission), a parent separates into two or more individuals of about equal size. This type of reproduction is common among single-celled organisms including bacteria, archaea, and unicellular eukaryotes, such as protists and some fungi. The single cell divides into two daughter cells.Aug 17, 2016
Explanation:
Can someone tell me if it’s correct
Answer:
yes ur right
Explanation:
TRUE OR FALSE!!!
______ 1. Before most cell divisions, most cells donot increase in size.
______ 2. During cell division, one of the daughtercells gets all of the larger chromosomes, and the other daughter cell gets allof the smaller chromosomes.
______ 3. The number of chromosomes in a cell is duplicatedbefore the beginning of mitosis.
______ 4. Many species of bacteria have a single circularchromosome that consists of double stranded DNA.
______ 5. Under ideal conditions, some bacteria canreproduce every 20 seconds.
Answer:
1. true
Explanation:
The placenta and umbilical cord act as a life support system. What role do they play in the healthy development of the fetus?
Answer:
It attaches to the wall of the mother's uterus, and the umbilical cord extends from it, connecting to the baby. It is the baby's life support system and breathing organ while in the womb. The placenta allows oxygen and nutrients to move from the mothers blood to the fetus' blood.
Which of the following correctly describes how DNA contributes to the traits that appear in offspring? A) DNA contains the instructions for building RNA, which influences traits. B) DNA contains the instructions for building proteins, which create the physical traits of offspring. C) DNA contains the instructions for building carbohydrates, which are responsible for the physical traits of offspring. D) DNA contains the instructions for building enzymes, which catalyze chemical reactions for the traits of offspring.
DNA attributes to the genotype preference to the individual. DNA contains the instructions for building RNA, which influences traits. The correct statement is answer A.
What is the full form of DNA ?DNA stands for deoxyribonucleic acid.
DNA contains the orders that are needed for any organism in order to develop, survive as well as reproduce. To carry out these duties, DNA sequences are needed to be converted into messages which can be used to produce proteins in which are the complex molecules that are doing most of work in our body.
Since we have two pairs of chromosomes and we also have two pairs of genes in which one is from our father and one is from mother. These pairs of genes then determine certain physical features or traits.
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Please help i am giving away brainiliest
Describe the Lytic cycle.
No dam links
Answer: here ya go
Explanation: The lytic cycle is one of the two cycles of viral reproduction
Answer:The lytic cycle (/ˈlɪtɪk/ LIT-ik) is one of the two cycles of viral reproduction (referring to bacterial viruses or bacteriophages), the other being the lysogenic cycle. The lytic cycle results in the destruction of the infected cell and its membrane.
Explanation: