The assembly of microtubules cytoskeletal structures are initiated by the m cyclin-cdk complex.
The third main component of the cytoskeleton, microtubules, are hard, hollow rods with a diameter of around 25 nm. Microtubules are dynamic structures that constantly assemble and disassemble within the cell, similar to actin filaments. Eukaryotic cells' cytoskeleton is made up of tubulin polymers called microtubules, which give eukaryotic cells their shape and structure.
consisting of numerous connecting components; A complicated roadway system is compound or composite. intricate machinery is an example of an arrangement of pieces, units, etc. that is exceedingly complicated or involved. A complex problem is one that is extremely intricate or complex, making it difficult to comprehend or solve. Complexity is a term used to describe a system's level of components. A complex issue is one that is made up of numerous elements.
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In 1978, scientists studied how the fitness of marine sticklebacks would be affected if they were introduced into a freshwater environment. They collected 90 male and 90 female sticklebacks from a marine population and 10 male and 10 female sticklebacks from a freshwater population. The 200 sticklebacks were introduced into a freshwater environment that had no stickleback fish previously.
Recently a scientist decided to repeat this study, but relocated a population of sticklebacks from a freshwater environment into a marine environment. Which of the following best predicts how the frequency of the allele would change over time if a population of sticklebacks from a freshwater environment was placed into a marine environment?
The frequency of alleles in the population started low and continued to increase over time.
What is frequency of alleles?The frequency of alleles refers to the ratio of the number of times an allele occurs to the copies of all the alleles at that particular genetic locus in the given population.
We can see that the sticklebacks had a greater number of those introduced from marine to fresh water hence of the 200 sticklebacks, the frequency of alleles in the population started low and continued to increase over time.
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help please i have no idea what the answer is to this and i’m in the middle of the test
Answer:
B
Explanation:
50 percent since the carbon dioxide produces evidence of energy produced
What do the Mitochondria and
Chloroplast have that other organelles
don't have?
Answer:
DNA
Explanation:
Both organelles possess their own DNA and ribosomes.
Describe how the two decomposers you chose would fit into this food web
Answer: Decomposers are organisms that break down dead or decaying organisms, In Fungi, they have special enzymes that digest the decaying organisms, when the fungi die they will leave behind much nutrition in the soil for producers. Earthworms are detritivores that physically ingest decaying organisms, physically breaking the material down to further help other organisms with the physical decomposition of nutrients. Waste from the earthworms also contains nutrients that would go back into the soil and help producers grow to keep the food web balanced. (You did not specify the food web so I'm using fungi as one example, and a detritivore such as an earthworm for the second.)
Explanation:
Question 9 (1 point) The term that describes the evaporation of water from plant stomata is OA A) Evaporation B) Precipitation C) Transpiration D) Perspiration
The term that describes the evaporation of water from plant stomata is transpiration. The correct option is C.
It is a natural process where water moves from the roots of a plant to its leaves and then evaporates into the atmosphere through small pores or openings called stomata. This process is essential for the survival of plants, as it helps in the absorption of nutrients and minerals from the soil.
Transpiration also plays a vital role in the water cycle, as it contributes to the movement of water in the environment. It helps in regulating the temperature and humidity levels in the atmosphere and plays a crucial role in the formation of clouds and precipitation.
Factors like temperature, humidity, wind, and sunlight affect the rate of transpiration in plants. In hotter and drier conditions, plants tend to lose more water through transpiration to cool themselves down. However, excessive transpiration can lead to water stress, affecting the growth and development of the plant.
In conclusion, transpiration is an essential process that helps in the survival of plants and contributes to the water cycle and the environment.
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Describe/draw/label in detail the process of Transcription & Translation. Make
sure to identify all key items and their roles.
Answer:
Through the Transcription & Translation, protein is synthesized
Explanation:
In the process of transcription, DNA is copied to mRNA. It is the mRNA that carries information about the protein synthesis. It has two steps – a) Formation of pre messenger RNA with the help of RNA polymerase enzymes and b) Edition of pre messenger RNA to produce desired RNA known as splicing.
In translation, mRNA is transported out of nucleus to the ribosome for the synthesis of proteins. tRNA is required for transportation.
Let the genomic sequence to be transcribed by –
3’ – TAA CGC CGT TCG TCA – 5’
The transcribed mRNA sequence would be
5’ – AUU GCG GCA AGC AGU – 3’
The translated genomic sequence is
Ile Ala Ala Ser Ser
AL 30 B I USA iii Iml A Month # of Deer September 38 October 32 Graph #1: Bart wanted to track the deer in a park near his house. He kept the count for six months. Your job is to use the data in the table and create a bar graph. Label and number the x and y-axis appropriately November 26 December 20 January 15 February 12 38 32 26 20 Number of deers 15 12 0 1) [3] A) (5) 6 months GO HOME
Answer and Explanation:
You will find the graph and the complete table in the attached file.
x-axis: Independent variables. Months in which Bart counted the deers (September, October, November, December, January, February).y-axis: Dependent variables. The Number of deers counted (38, 32, 26, 20, 15, 12).Describe how the light-dependent and light-independent reactions work together in photosynthesis
According to the research, in photosynthesis, through the light-dependent reactions energy is contained in the NADPH and ATP molecules that is used by light-independent reactions.
What is photosynthesis?It is the process that converts solar energy into chemical energy which, stored in cells, allows the formation of carbohydrates and other organic molecules.
In this sense, the light-dependent reactions occur in the thylakoids whose chemical energy is comprised of molecules of two types NADPH and ATP.
On the other hand, light-independent reactions occur in the chloroplast matrix with the intervention of enzymes that intervene in the reduction of CO2 molecules to establish carbohydrates through the energy sources ATP and NADPH.
Therefore, we can conclude that the light-dependent reactions in photosynthesis manufacture ATP and the reducing source NADPH necessary for light-independent reactions.
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The process of osmosis is best illustrated by the movement of a. water into root hair cells b. oxygen intro red blood cells c. carbon dioxide through stomates d. glucose through phloem
Answer:
a. water into root hair cells
Explanation:
Osmosis can be defined as a process which typically involves the movement of a solvent molecule such as water through a semi-permeable from a region of high concentration to a region of lower concentration.
Hence, the process of osmosis is best illustrated by the movement of water into root hair cells because they are used by the plants to absorb water from the soil.
Experiment 2:
Compare the circumference of the balloon before and after freezing. What is the percent increase in this measurement?
Answer:
17%
Explanation:
Answer:
17%
Explanation:
What is the approximate length of the geologic time scale?
look at the diagram of villi. Which label points to a capillary?
Explanation:
Uhhmmm.....W-where's the diagram though?..
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We can't even answer it cuz u didn't take a picture of ur homework or something..
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can yeast replace itself with new cells
Answer: Yes
Explanation:Most yeasts reproduce asexually by budding: a small bump protrudes. A few yeasts reproduce by fission, the parent cell dividing into two equal cells.
A person whose red blood cells agglutinate with anti-B antibodies BUT NOT anti-A antibodies is type _________.
A person whose red blood cells agglutinate with anti-B antibodies BUT NOT anti-A antibodies is type B.
The presence or absence of certain antigens on the surface of red blood cells determines blood type. There are two antigens in the ABO blood type system: A and B. Individuals can be classified as A, B, AB, or O based on the presence or lack of certain antigens.
If a person's red blood cells agglutinate (clump together) when exposed to anti-B antibodies but not anti-A antibodies, it indicates that the person has the B antigen on their red blood cells and does not have the A antigen. This corresponds to blood type B. In blood type B individuals, their immune system produces antibodies against the A antigen, which is why their red blood cells agglutinate with anti-B antibodies. However, they do not have the A antigen on their red blood cells, so they do not agglutinate with anti-A antibodies.
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Which atom would form the ionic compound X₂S?
Covalent bonds between nonmetals, ionic bonds between metals and nonmetals, and metallic bonds between metals are the three types of bonds that typically form.
Ionic bonding between metals do they exist? Only between metals and nonmetals may ionic bonding develop. This is due to the fact that nonmetals "desire" to gain electrons while metals "want" to give up electrons. To liberate an atom's valence electrons and create a positive ion, energy is required.Covalent bonds are those created when two atoms share electrons in order to achieve their closest configuration to that of a noble gas. Normally, it forms between two non-metals.A metal and a non-metal combine to form an ionic connection. Non-metals(-ve ion) are "stronger" than metals(+ve ion) and are highly good at stealing electrons from metals. The ionic connection is created by the attraction of these two opposing ions.Both their melting and boiling points are high. In the solid state, they are electrically conductive.To Learn more About Covalent bonds, Refer:
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Which organelle is the location where mRNA is translated into a protein?
Answer:
its ribosomes. In eukaryotes, mature mRNA molecules must leave the nucleus and travel to the cytoplasm, where the ribosomes are located.
Answer:
ribosomes
Explanation:
Which cycle is involved in both photosynthesis and respiration?
Water
Phosphorous
Nitrogen
O Carbon
Describe the effect of increasing carbon dioxide concentration on the rate of photosynthesis at low light intensity
Explanation:
photosynthesis will slow down, at low intensity of light.
What alleles do the F, offspring have? Explain which allele was inherited from each parent.
The F1 off springs alleles in Mendel's work are dominant alleles.
What are alleles?An allele is one of several forms that a gene may take on, whilst genes themselves represent the fundamental components responsible for passing on hereditary information and comprise DNA molecules.
Alleles occur at specific locations or loci within chromosomes and humans display diploidy- inheriting a pair of chromosomes (one from each parent)- which denotes that every person possesses two distinctive alleles per gene.
Mendel's experiments have shown that the F1 generation displayed heterozygous characteristics across all observed traits. To put it simply, these offspring inherited one dominant and one recessive allele each.
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Correct question: What alleles do the F1 offspring have? Explain which allele was inherited from each parent.
Select the correct answer
Answer:
A.
Explanation:
Choice A states, "Human liver cells make proteins that promote homeostasis, and neurons do not." This statement supports that complex, multicellular organisms are composed of specialized cell types with different functions. First, humans are multicellular organisms. Next, Choice A points out the difference between liver and neuron cell function (liver cells can promote homeostasis while neurons do not), which means that the cells that compose a human are specialized with different functions.
How does coevolution affect biodiversity?
Answer:
Coevolution plays a key role in shaping the biodiversity on Earth. Coevolution is commonly defined as reciprocal evolutionary changes brought about by interactions between species, implying that interacting species impose selection on each other.
the number of resonance structures for the nitrate ion that satisfy the octet rule is
the answer is three resonance structures
Please help me
Charlie took 6 minutes to run a mile. His sister, Christina, took 12 minutes to run a mile. Which of the following is true?
A. Christina ran faster than Charlie.
B. Charlie ran faster than Christina.
C. It cannot be determined who ran faster.
D. Charlie and Christina ran at the same speed.
Answer:
A. Charlie ran faster than Christina
Explanation:
Charlie: 6 mins per 1
Christina: 12 mins per 1
12 is longer than 6
Which nitrogen base sequence is the partner of T-C-A-G-C-A?
A-C-G-A-CIES
C-A-G-A-T-G
A-G-T-C-G-T
O T-C-A-G-C-A
Answer:
A-G-T-C-G-T
Explanation:
An easy way to remember is: car in the garage for c and g, apple in the tree for a and t.
how do gray whales migrate?
Answer: Grey whales travel 12,000 miles round-trip from their feeding grounds in the Arctic to calve and breed in the Baja lagoons, and then back again.
Explanation:
Neural signals from olfactory cilia are transmitted to the
areas of the brain.
A. thalamus . . . olfactory cortex
B. olfactory bulb . . . olfactory cortex
C. olfactory cortex . . . olfactory bulb
D. olfactory bulb. . . thalamus
and then transmitted to the
and other
Answer:
C. Olfactory cortex
Explanation:
Olfaction first occurs in the sensory cilia of olfactory neurons, and the generated olfactory signals are transmitted to the olfactory cortex and to other area of the brain through synaptic connections of olfactory neurons with downstream neurons, such as mitral or tufted cells, in the main olfactory bulb.
As organisms become more complex and increase in size they develop a need for a
Answer:
Recently work in evolution theory has proposed that by relaxing selection pressure, which typically acts to streamline genomes, the complexity of an organism increases by a process called constructive neutral evolution.
Explanation:
What nervous system is responsible for pupil dilation.
Answer:
the sympathetic nervous system
Explanation:
Where does the egg receive its energy from?
options:
a. The ovum contains a large quantity of cytoplasm, which contains nutrients for the first days of development after fertilization. The cytoplasm of the ovum contains over 140 000 mitochondria to produce ATP required for growth.
b. The uterus contains over 140 000 mitochondria to produce ATP and supplies this to the egg for growth.
c. Similar to sperm it receives its energy from fructose through its path to the uterus.
d. The ovum contains a large quantity of fimbria, which contains nutrients for the first days of development after fertilization.
Answer:
Until attachment to the uterus, the developing organism is on its own. That means it needs to supply its own energy, so the cytoplasm of the human egg cell contains many energy-generating factories called mitochondria. Those mitochondria come only from the mother.
a. The ovum contains a large quantity of cytoplasm, which contains nutrients for the first days of development after fertilization. The cytoplasm of the ovum contains over 140 000 mitochondria to produce ATP required for growth.
Explanation:
Part I Illuminating Photosynthesis #1 : Fill in this concept map depicting the major steps in photosynthesis in the chloroplast H20 of Photosystem I transfers Word Bank Electron Transport Chain ATP Synthase Calvin Cycle Light NADPH Chlorophyll Protons CO2 Photosystem II Electrons 02 to produce ATP G3P (Sugar Building Block) #2 : Fill in the table: Major Steps in Does this step depend on Experimental variable to What would happen if an Photosynthesis any other step? How? measure? herbicide disrupted this Photosystem II Photosystem l ATP Synthase Calvin Cycle
Photosynthesis in chloroplasts involves major steps such as light absorption, electron transport, ATP synthesis, and carbon fixation. It begins with light-dependent reactions in photosystems I and II, followed by electron transport and ATP synthesis.
Step 1: Photosynthesis is a complex process that occurs in the chloroplasts of plants, involving several major steps such as light absorption, electron transport, ATP synthesis, and carbon fixation.
Step 2:Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose. It occurs in the chloroplasts, specifically in three main stages: light-dependent reactions, electron transport chain, and the Calvin cycle.
During the light-dependent reactions, light energy is absorbed by chlorophyll molecules in photosystem II (PSII) and photosystem I (PSI). In PSII, water molecules are split, releasing electrons, protons (H+ ions), and oxygen. The electrons move through an electron transport chain, creating a proton gradient across the thylakoid membrane. This gradient is essential for ATP synthesis by ATP synthase, using the energy from the electron flow.
In PSI, electrons are re-energized by absorbing more light energy and are ultimately used to produce NADPH, another energy carrier. The ATP and NADPH generated in the light-dependent reactions are then used in the Calvin cycle.
The Calvin cycle, also known as the light-independent reactions or carbon fixation, occurs in the stroma of the chloroplast. It uses ATP, NADPH, and carbon dioxide (CO2) to produce glucose (G3P), which serves as a building block for sugars and other organic compounds. The cycle regenerates the starting molecule, ribulose bisphosphate (RuBP), allowing the process to continue.
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