Answer:
The mitotic phases alternate with interphase in the cell cycle. In interphase, the G1 phase occurs first where the cell grows while carrying out cell functions unique to its cell type. Then the S phase takes place where the cell duplicates its chromosomes. Next is the G2 phase, just before mitosis where the cell continues to grow and carry out its functions. After interphase, mitosis occurs, the first phase in mitosis is prophase where the chromatin becomes tightly coiled and the nucleoli disappear. Next is prometaphase where the nuclear envelope begins to fragment, and the two chromatids of each chromosome are held together by the centromere. After prometaphase is metaphase during which the microtubules and move the chromosomes to the metaphase plate at the equator of the cell. Next is anaphase where the sister chromatids separate. After anaphase, telophase occurs where the nuclear envelopes reform around the set of chromosomes located at opposite ends of the cell. Cytokinesis also occurs which is the division of the cytoplasm.
Why do different cells have different functions?
a All cells have the same functions.
b Because different cells have different genes.
c Because different cells have diferent DNA.
d Because different cells have different proteins.
Answer: its b
Explanation:
6. During the very early stages of a person's life cycle, the rate of cell division proceeds rapidly. During this time, cells show little growth. What can you conclude from this information about the cell cycle during these very early stages of development?
F The cell cycle consists mainly of a long G phase.
G The cell cycle consists mainly of short M and S phases.
H Most cells exit the cell cycle.
j Most cells will not undergo mitosis.
Enzymes are protein catalysts. What is the role of a catalyst?
Answer:
Enzymes are proteins functioning as catalysts that speed up reactions by lowering the activation energy. A simple and succinct definition of an enzyme is that it is a biological catalyst that accelerates a chemical reaction without altering its equilibrium.
Catalysts make such a breaking and rebuilding happen more efficiently. They do this by lowering the activation energy for the chemical reaction. Activation energy is the amount of energy needed to allow the chemical reaction to occur. The catalyst just changes the path to the new chemical partnership.
MORE HELP PLZ
Which group of organisms evolved first?
amphibians
fish
reptiles
mammals
Answer:
I'm pretty sure it's fish since they evolved into both reptiles and amphibians
Explanation:
The first creatures that evolved the first are fish. The first creatures they were evolved before amphibians,reptiles and mammals were fish.
What is the king organism of reptiles ?The king organism of reptiles category is crocodile.
Amphibians, reptiles, mammals and birds evolved after fish where the first amphibians that evolved from a lobe-finned fish ancestor about 365 million years ago. Fishes were the most earliest vertebrates to live on land but they had to return to water in order to reproduce.
The first vertebrates were therefore the fishes that had the different categories from chordates and vertebrates where few had the notochord and few had the vertebral columns.
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Which items are matter?
Answer:
everything is matter
Explanation:
Which of these organelles are responsible for providing internal
support and structure for cells? *
1 point
A. Golgi Body
B. Cytoskeleton
C. Cell membrane
D. Chloroplast
ANSWER ASAP
The organelle responsible for providing internal support and structure for cells is the cytoskeleton.
What is a cytoskeleton?The cytoskeleton is a dense network present in the cytoplasm.
The cytoskeleton is a structure that provides shape and internal organization to the cell.
It also gives the cell mechanical strength.
It helps the cell to perform its functions.
Thus, the correct option is B., cytoskeleton.
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how many co2 produced in 3 glucose
Answer:
Co2 produced in 3 glucose is 2
what is a reservoir fit carbon and nitrogen, but not phosphorus?
Answer:
The atmosphere is a reservoir for carbon and nitrogen and cannot be a reservoir for phosphorous. This is because the phosphorous cycle does not include gaseous phase.
Explanation:
Decomposers are also called? *
A. Herbivores
B. Carnivores
C. Consumers
D. Producers
Answer:
The answer is C.
Explanation:
Decomposers feed on dead organisms like plants and animals.
Which is true about scientific Knowledge??
A. It is never reliable.
B. It is open to change.
C. It is rarely proven wrong.
D. It always becomes a fact.
Answer:
C
Explanation:
1. Imagine that the class had 25% of students with free earlobes and 75% with attached earlobes. What would this suggest about the frequency of the dominant (F) and recessive (f) alleles for these traits in the class population? Explain your reasoning.
Answer:
People with free earlobes carry one or two dominant alleles which means that the free earlobe is a dominant trait over attached earlobes that carries two recessive alleles. The recessive allele is represented by f and the dominant allele is represented by F.
It is given that in a class 25% of students in the class had free earlobes which means either 25% of total alleles are FF or Ff and the rest 75% have ff. It suggests that recessive alleles have more frequency than dominant alleles.
Which is a correct statement regarding the symmetry of the adult Porifera and the symmetry of the adult Cnidaria?
a. The Porifera are asymmetrical, while the Cnidaria are radially symmetrical.
b. The Cnidaria are asymmetrical, while the Porifera are radially symmetrical.
c. Both the Porifera and the Cnidaria are asymmetrical.
d. Both the Porifera and the Cnidaria are radially symmetrical.
Answer:
The correct answer is - a. The Porifera are asymmetrical, while the Cnidaria are radially symmetrical.
Explanation:
In biology, symmetry f the body is meant the presence of a pair of organs in an orderly manner that if divide the body each part is a mirror of the other. In the phylum Porifera have asymmetric body plane.
Some animals develop into adults with radial symmetry. Cnidaria adults have radial symmetry type of body plans that eans if they are cut from the middle they divide in the two equal organs into both sides.
What happens when the seafloor spreads?
The scientist's hypothesis that all of the continents were previously one large continent until something caused them to move apart is called _______________.
continental drift
Pangaea
origin of continents
supercontinent
Explain the importance of having both chloroplast and mitochondrial in plant cells
Keep it short
Answer:
Chloroplasts make food for plants and the Mitochondria uses oxygen to make ATP.
Explanation:
When the head is tilted, what are the structures the signal passes through on its way to becoming a fully processed neural signal within the brain?
When the head is tilted, the fluid within the_____of the inner ear moves. The exact location of stimulated cells depends on the plane of movement-with each plane being represented by a different part of that structure. The movement of fluid stimulates______which transduce the signal into an electrical signal. This signal travels through the_____nerve to the____nucleus of the_____.
Answer:
The fluid within the semicircular ducts of the inner ear, that is, endolymph moves when the head is tilted. The precise position of the stimulated cells relies upon the plane of movement with each vertical or horizontal plane being signified by distinct parts of its composition. The hair cells that transduce the signal into an electrical signal get stimulated due to the movement of fluid. The conduction of this signal takes place via the auditory nerve to the cochlear nucleus of the brainstem.
Within the inner ear cochlea, the stimulation of the hair cells or stereocilia takes place by endolymph, it is a fluid present in semicircular ducts. After stimulation, the hair cells mediate electric signals to the brain via the auditory nerve, these are the nerve bundles that carry signals of sound. The initial central auditory composition found in the brainstem is the Cochlea nucleus.
Answer:
the fluid within the -semicircular canals- of the inner ear moves. the movement of the fluid stimulates the -hair cells- which transduce the signal into an electric signal. This signal travels through the -vestibulocochlear nerve- to the vestibular nucleus of the -medulla oblongata-.
Explanation:
_________________ results in the formation of two new cells.
Answer:
mitosis
Explanation:
A: mitosis results in the formation of two new cells.
E: Mitosis results in the formation of two genetically identical daughter cells. This is because all the genetic material is duplicated then segregated equally to the daughter cells.
How do proteins interact with viruses?
Which of the following agents of erosion would be the direct cause of a landslide?
A. gravity
B. ice
C. water
D. wind
Answer:
A.
Explanation:
because the gravity will drop
Giant Sequoias are commonly called_________________?
Answer:
Redwoods
Explanation:
The author compares the movement of the plates to chunks of ice moving on the top of the frozen river. This comparison is used to:
Answer:
this comparison is used to help explain the movement of the plates, to give an example of the movement.
Explanation:
This analogy is used to illustrate the movement of the plates and to assist understand it.
What is plate tectonics?A uniform framework for comprehending mountain-building processes, volcanic eruptions, earthquakes, the evolution of the Earth's surface, and reconstructing the planet's former continents and oceans was provided by the plate tectonics theory, which deals with the dynamics of the lithosphere, the outer shell of the planet. This theory revolutionized Earth sciences.
In the 1960s, the theory of plate tectonics was developed. The lithosphere, which is Earth's outermost layer and is normally around 100 km (60 miles) thick, sits on top of the asthenosphere, which is malleable and partially molten. The lithosphere is divided into numerous tiny plates, six or seven medium-sized regional plates, and seven extremely massive continental and oceanic plates.
These plates interact at their borders, where they converge, diverge, or slide past one another, moving relative to one another often at speeds of 5 to 10 cm (2 to 4 inches) each year. Although earthquakes and volcanoes can occur in plate interiors, these interactions are regarded to be the main cause of the majority of Earth's seismic and volcanic activity.
Where plates press together or converge, mountains will rise, and where plates pull away or diverge, continents will split and oceans will arise. Since the continents are passively drifting with the plates over the course of millions of years, the Earth's geography has undergone enormous changes.
Therefore, this analogy is used to illustrate the movement of the plates and to assist understand it.
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Why are carbon dioxide concentrations expected to increase?
A) Carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected
to increase.
B) Carbon dioxide concentrations are expected to increase, because of an increase in agriculture.
C) Carbon dioxide concentrations are expected to increase, because more land will have to be
cleared for increasing populations and agricultural use.
D) Carbon dioxide concentrations are expected to increase, because the amount of vegatation cover
and hence photosynthesis which reduces it continue to decrease.
E) All of the above
Please select the best answer from the choices provided
Explanation:
all apple but in terms of usage,I think C and A are very extensive
Answer:
its all of the above
Explanation:
If you fertilize your houseplant too often, you may find that it looks wilted even when the soil is wet. Explain what has happened in terms of water potential?
Answer:
Water moved out of the cells of the houseplant into the extracellular solution because they (plant cells) have a high water potential (Ψ) than the extracellular environment.
Please find the explanation below
Explanation:
In biology, water potential, denoted by Ψ, refers to the ability of water to move freely in a system. Based on this definition, a hypertonic solution (solution with higher solute concentration) will have a low Ψ while a hypotonic solution (solution with low solute concentration) will have a high Ψ.
According to this question, if a houseplant is fertilized too often, it will increase the concentration of solute in the soil (extracellular environment of the plant cells) i.e. the fertilizer will make the extracellular solution HYPERTONIC. Because the cells of the houseplant are hypotonic to the soil solution i.e. now has a high Ψ in comparison with the soil solution, water will move from the cells of the plant to the soil solution (extracellular) via the cell membrane (semi-permeable membrane) in a process called OSMOSIS.
NOTE: Water moves from a solution with high Ψ to a solution with low Ψ. This is what propels the movement of water from the cell with a high water potential to the exterior of the cell with a low water potential (caused by frequent addition of fertilizer). Overall, the houseplant will look WILTED even if the soil is wet.
Answer:
Water moved out of the cells of the houseplant into the extracellular solution because they (plant cells) have a high water potential (Ψ) than the extracellular environment.
Please find the explanation below
Explanation:
In biology, water potential, denoted by Ψ, refers to the ability of water to move freely in a system. Based on this definition, a hypertonic solution (solution with higher solute concentration) will have a low Ψ while a hypotonic solution (solution with low solute concentration) will have a high Ψ.
According to this question, if a houseplant is fertilized too often, it will increase the concentration of solute in the soil (extracellular environment of the plant cells) i.e. the fertilizer will make the extracellular solution HYPERTONIC. Because the cells of the houseplant are hypotonic to the soil solution i.e. now has a high Ψ in comparison with the soil solution, water will move from the cells of the plant to the soil solution (extracellular) via the cell membrane (semi-permeable membrane) in a process called OSMOSIS.
NOTE: Water moves from a solution with high Ψ to a solution with low Ψ. This is what propels the movement of water from the cell with a high water potential to the exterior of the cell with a low water potential (caused by frequent addition of fertilizer). Overall, the houseplant will look WILTED even if the soil is wet.
Explanation:
Use the diagram below to help you to choose ALLL the CORRECT answers for the question: What are the differences between Meiosis i and Meiosis II?
(MULTIPLE CHOICE)
A In Metaphase I and Metaphase II the chromosomes line up differently because there are a different number of copies
B Telophase and cytokinesis do NOT happen in Meiosis II
C After Meiosis II the 4 daughter cells undergo cell specialization to become eggs or sperm, which does not happen after Meiosis I
D In Prophase I the chromosomes crossover, in Prophase II they do not crossover
Answer:
D In Prophase I the chromosomes crossover, in Prophase II they do not crossover
Explanation:
Meiosis is a type of cell division in which four daughter cells, which are genetically different from one another, are produced. The daughter cells have their chromosomal number reduced by half. Since, the meiotic process aims at producing haploid gametes, it occurs in a series of two-division steps viz: meiosis I and meiosis II.
Meiosis I involves the separation of homologous chromosomes into two daughter cells while the meiosis II involves separation of chromatids to make four daughter cells. One major difference between meiosis I and meiosis II is that in the PROPHASE of meiosis I, a unique process called CROSSING OVER occurs but does not occur in meiosis II (as seen in the attached image).
Which of the following organisms have the ability to do photosynthesis
Answer:
any plants
Explanation:
The solid, outermost layer of the Earth is ___________.
A)
core
B)
lithosphere
C)
atmosphere
D)
crust
E)
mantle
Answer
d.crust
Explanation
because he covered the layer of the earth
Answer:
the lithosphere
Explanation:
The lithosphere is the outermost layer of the Earth. It is a rocky shell that covers the hot, convective mantle and the core.
How do craters on other solar system objects provide evidence about earth?
Answer:
The surfaces of asteroids and the rocky, ice covered moons of the outer gas planets are cratered as well. The craters left by impacting objects can reveal information about the age of a planet's surface and the nature and composition of the planet's surface at the time the crater was formed.
Explanation:
Looking at the Punnett square, what are the possible genotypes and frequencies
of Martha and John's children? *
A
a
а
Аа
аа
а
Аа
аа
Your answer
Answer:
50% or 1/2 of the children will be heterozygous.
50% or 1/2 of the children will be recessive hom0zygotic.
Explanation:
The density of a substance equals its mass divided by its volume. Talia listed the density of some common materials at 20 °C.
Material / Density (g/cm3)
gasoline = 0.70
mercury = 13.6
milk = 1.03
water = 0.998
If Talia has 10 grams of each material, which material has the greatest volume?
Show your work below.
Answer:
some common materials at 20°C
Material
Density (g/cm3)
gasoline
0.70
mercury
136
milk
1.03
water
0.998
If Talia has 10 grams of each material, which material has the greatest volume?
Explanation:
26. Suppose the two guanosine (G) nucleotides in #3 above were changed to two cytosine (C) nucleotides. What is the new amino acid chain?
Answer:
This question is incomplete
Explanation:
This question is incomplete but the completed question can be found in the attachment below.
During protein synthesis, a sequence of three mRNA nucleotides (called codons) correspond to specific amino acids. From the question, the change in guanosine nucleotides will change the sequence as follow
DNA: T--A--C--A--A--C--T--A--C--T--T--C--T--T--T--C--T--T--A--A--A
mRNA: A--U--G|-U--U--G|-A--U--G|-A--A--G|-A--A--A|-G--A--A|-U--U--U
Amino Acids: met -- leu -- met -- lys -- lys -- Glu -- Phe
The new amino acid sequence is represented above from the new DNA sequence.