Explanation:
Packaging Of Dna Double Helix:Prokaryotes
↬ No well defined nucleus.
↬ DNA is held with some proteins in nucleoid region.
Eukaryotes
↬ Histones:
↬ Positively charged proteins. ↬ Rich in arginine and lysine. ↬ 5 types:- H₁ H₂A, H₂B, H₃ H₄.↬ Histone octamer:
↬ A pair of 4 histones.↬ Nucleosome:
↬ DNA (-ve charge) makes two complete turns around the histone octamer (+ve charge) to form a nucleosome.Answer:
in prokaryotes there is there is not proper neucloseomw
Which event is directly mediated by a ligand-gated ion channel?.
Answer:
Influx of Na+ across the motor end plate resulting in the depolarization of the muscle fiber membrane
**because the influx of Na+ across the motor end plate occurs when Na+ ion channels bind the ligand acetylcholine.
When a child is bron with a chromosomal mutation when did the mutation occur
Answer: It happens during meiosis
Why were different organisms
found on each island of the
Galapagos?
A. The islands were far apart geographically
from one another.
B. The climate of the islands varied.
C. Organisms were the same from one island to
the next.
Answer:
Its B
Explanation:
The Climate Of The Islands Varied
How much oil could be saved if home temperatures were lowered by six degrees?
Oils are lipids which are soluble in organic solvents and insoluble in polar solvents such as water. For saving on heating oil prices is to knock the lowering down temperature a few degrees. The Department of Energy research reports that for every degree cooler we can save between 1-3%.
what is polar and non polar solvent?Polar solvents have large dipole moments because they contain bonds between atoms with different electronegativity, such as hydrogen and oxygen.
Non polar solvents forms bonds between atoms with similar electronegativity, such as hydrogen and carbon.
It is possible to still keep oil heat bill down by looking into weatherproofing home, smartly using an efficient thermostat.
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A cell has 20 chromosomes. How many cells will there be after meiosis II?
a
2
b
4
c
10
d
20
Answer:
c) 10 chromosomes
We have now added Climate Change to the threats of biodiversity. What is climate change, and how does it affect biodiversity?
Answer:
Climate Change - long-term shifts in temperatures and weather patterns
Bio - A major impact of climate change on biodiversity is the increase in the intensity and frequency of fires, storms, or periods of drought.
Which statement is true about organ systems in the human body?
Choose 1 answer:
(A) if one organ system fails due to a disease, another will take its place.
(B) each organ system carries out a unique function in the human body.
(C) each organ system works completely alone as it helps the body live and grow.
Using what you have learned from the lesson and the virtual lab activity, answer the following questions in complete sentences.
1. How did the colors of each type of prey affect its population size over time?
2. How do you predict the data would change if you continued? Explain your answer.
3. What traits could help a predator be more "fit" to survive in each environment? Be specific.
4. Describe other adaptations besides color that could affect an individual's survival.
5. Explain what will happen if there are not enough resources to support the individuals in a species.
6. This experiment tested natural selection. What could be another possible mechanism of evolution for the rabbits to evolve? Be specific.
Answer:
Cookies are ok not the best but ok
Explanation:
2. What is the electrical potential energy difference across the light bulb after the wire is cut?
A 0.0 V
B 1.5 V
C -1.5 V
D Need more information.
3. After the wire is cut, what is the electrical potential energy difference across the two ends of the cut wire?
A 0.0 V
B 1.5 V
C -1.5 V
D Need more information.
Answer: i would say for number 2 its A and number 3 D
Explanation:
for number 2 its A and number 3 D.
What is Potential energy difference?The work done on q by the electrostatic or Coulomb force is independent of the direction taken because it is a conservative force. The gravitational force in the absence of dissipative forces like friction is exactly identical to this.
When a force is conservative, it is possible to define a potential energy that goes along with the force. Because the potential energy varies solely on position, managing it is typically simpler than calculating the work directly.
Electric potential energy and gravitational potential energy are quite similar. Without having to interact directly with the force, potential energy accounts for the work carried out by a conservative force and provides additional insight into energy and energy change.
Therefore, for number 2 its A and number 3 D.
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Which of the following is true about blood pressure?
que
A It is not affected by atheroscierosis.
B
It is typically lower in veins than in arteries.
C
It drops a great deal when traveling through
arteries.
Diastolic pressure is higher than systolic
pressure.
D
Answer:
d
Explanation:
because i have high blood pressure all this time
What does “adaptation” of populations have to do with the “fitness” of individual organisms in the population?
Answer:
As organisms adapt to changing conditions, they evolve in a way to fit their surrounding environment. According to Darwin's survival of the fittest concept, organisms that can adapt to fluctuating conditions are more fitter and hence selected by nature.
Here fitter means reproductive superiority.
THE WATER CYCLE Extension: You are a water molecule. Write a story from your own point of view as you travel around the world in the water cycle. Bonus if you become all 3 states of matter (solid, liquid, and gas).
Answer:
i am a ice and the next morning the sun was warming and i changed my form as a water and the sun was too hot that i changed my form to gas and went into the sky.
question; both trypanosoma and plasmodium are different in .......
a) type of nucleus
b) ability to move
c) mode of nutrition
d) phylum they belong to
what is the relationship between codons and anticodons?
Answer:
Complementary to each other
Answer:
Complementary nitrogenous bases
Explanation:
The codons and anticodons have complementary nitrogenous bases, allowing them to base pair. Because the kind of amino acid attached to a tRNA depends on the tRNA's anticodon, the base pairing between the anticodons and codons brings a specific sequence of amino acids to the ribosomes. For example, the codon labeled F is complementary to the anticodon UAC and codes for the amino acid methionine.
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PLEASE ANWSER
Four o’clock flowers can be red (RR), white (rr), or pink (Rr). If a pink flower and red flower are crossed, what will be the phenotypic ratio?
100% pink
50% red, 50% pink
100% Rr
50% RR, 50% Rr
Answer:
See below ~
Explanation:
If red and pink flowers are crossed, then there will be :
50% red, 50% pink 50% RR, 50% RrSo if both are crossed
The total combination is 100% But as there are 2 so it should be 100/2=50% for Red and pinkSo
the ratio is
50% RR and 50% rrWhat are disadvantages of line breeding?
Answer:
Line breeding can accomplish several goals: 1) produce a more consistent and uniform offspring; 2) identify breeding populations that have no genetic flaws, or identify existing flaws so they can be eliminated; 3) accentuate and sustain more consistent excellence; 4) develop linebred progeny that will provide :]
. Take 400ml milk, curd, four small clean jars with lids labelled A, B, C and D. Pour about 100 ml of lukewarm boiled milk into each jar. Add a teaspoon of curd to jar A and D. Place jar D in a refrigerator. Place jars A, B and C in a warm place. Observe the jars after four to five hours and answer these questions.
i) What do you see in jars A, B and C?
ii) Why did the milk in jars B and C not set into curd?
iii) What happened in D? Can you say why?
1. The milk will be turned into curd in bowl A due to the lactobacillus bacteria and not in other bowls B, C.
What is lactobacillus bacteria?
Lactobacillus is the bacteria required for the formation of curd and it requires an appropriate temperature for its growth. Lukewarm milk not being very much cool and hot provides that appropriate temperature and hence lukewarm milk get converted into milk.
2. Bowl B and C contains hot and cold milk that do not provide required temperature for the growth of bacteria due to which bacteria does not grow in them and they are not converted into curd.
3. Bowl D placed in refrigerator, so the the bacteria unable to divide because they does not get the required temperature and doesn't changed into curd.
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The Northern and Southern Hemispheres of Earth experience four seasons during the
year. What is the main reason for the change in seasons?
the rotation of the Earth on its axis
Answer:
Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.
Why are seeds an evolutionary advantage for seed plants?
Seeds offer the embryo protection, nourishment, and a mechanism to maintain dormancy for tens or even thousands of years, ensuring that germination can occur when growth conditions are optimal. Seeds therefore allow plants to disperse the next generation through both space and time.
Pls mark as brainliest answer if it helps you
Answer:
C. Seeds protect the plant embryo and its food source
Explanation:
took the test
Gabriel is performing an experiment in which he is measuring the energy and work being done by a ball rolling down a hill. Which statement best describes Gabriel’s measurements?
They will remain constant.
They will both be recorded in joules.
They will both be recorded in hertz.
They will involve compressions.
Answer:Its A
Explanation:Edge
Gabriel is performing an experiment in which he is measuring the energy and work being done by a ball rolling down a hill. The statement they will both be recorded in joules is best describes Gabriel’s measurements. Correct Option is 2.
Energy and work are both physical quantities measured in joules (J) in the International System of Units (SI). In this experiment, Gabriel is measuring the energy and work associated with the ball rolling down a hill, and both measurements will be expressed in joules. Energy represents the capacity to do work, and work is the transfer of energy that occurs when a force is applied to move an object over a distance. Both energy and work are directly related and are measured in the same unit, joules, which is a measure of energy or work.
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Which term describes a possible explanation of or answer to a scientific question that is based on prior knowledge or
research and that is testable?
Answer:testing
Explanation:bytrsting and work you good
Which animals use the specialized roles of diver and barrier while participating in cooperative hunting? ants zebra bottlenose dolphins wildebeests
Bottlenose dolphins use the specialized roles of diver and barrier while participating in cooperative hunting.
What is Diver and Barrier?This is a hunting technique used by dolphins in which five of its members form a barrier while one dives to catch the prey.
This is a form of cooperative hunting which therefore makes option C the most appropriate choice.
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Answer:
Bottlenose dolphins
Explanation:
They have been known to work in groups hunting for food, did you know that they make a dirt wall to confuse the fish into jumping over it, that is how they catch their food, the fish jump and they try to catch them in the air
6.04 energy conservation design worksheet
In this section, describe at least six green building approaches from the
lesson (or your research) that you would like to use in your model green
home.
Description of Green Source Approximate Energy
Price of Using the
Building Approach
Savings
Approach
Approach 1
Approach 2
Approach 3
Approach 4
Approach 5
Approach 6
Total Price
Energy Efficiency:
In this section, describe at least six energy-efficient appliances and
technologies from the lesson (or your research) that you would like to use
in your model green home.
Description of
Source Approximate Energy
Appliance/Technology
Savings
Price of Using the
Appliance/Technology
Telli
Item 2
Item 3
Item 4
fem )
Item 6
Total Price
The six green building approaches to use are:
Heating and Cooling system.Water collection systems.What are Green energy sources?
Others are;
Use of natural and recycled materials. Water Treatment and Waste Management.Promoting local food production.Integrated building processes.Green energy sources are known to be a kind of naturally sustained, energy source.
Energy-efficient appliances are:
Washing machinesDryersRefrigeratorsDishwashersDehumidifiers.Note that Green sources is one that des not used mining or drilling operations as it can cause great harm to our eco-systems.
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Identify the level(s) of protein structure present in this molecule. Select all that apply. primary secondary tertiary quaternary
The the levels of protein structure in the molecule would be tertiary and quaternary structures.
What are the levels of protein structure?The levels of protein structure are as follows:
primary secondary tertiary, and quaternary structuresThe primary structure is the peptide bonds of the amino acids.
The secondary structure is the alpha and beta helices.
Tertiary structure are folds in the protein structure.
Quaternary structure is the association of protein chains.
Therefore, the levels of protein structure in the molecule would be tertiary and quaternary structures.
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how often can a catalase molecule be used to hydrolyze hydrogen peroxide?
Answer:
One molecule of catalase can break 40 million molecules of hydrogen peroxide each second
Explanation:
Which of these does NOT occur during meiosis?
production of new gene combinations
production of identical gametes
crossing-over of homologous chromosomes
reduction of chromosome number by one-half
Dna is made of chains of four smaller molecules called.
Answer:
DNA is made of chains of four smaller molecules called "Nucleotides".
Explanation:
A molecule consisting of a nitrogen-containing base (adenine, guanine, thymine, or cytosine) in DNA is known as a nucleotides.
What is the part of the kidney where urine is formed?.
A __________ is an area of hundreds of kilometers of ocean with fish or plant life.
An ecosystem with high biodiversity experiences a wildfire. What is likely to happen?
A. Some of the species will live, and the ecosystem will survive with reduced biodiversity.
B. All of the species will die, and the ecosystem will collapse.
C. The ecosystem will remain the same before and after the wildfire.
D. Biodiversity will increase after the wildfire.
Answer:
A. Some of the species will live, and the ecosystem will survive with reduced biodiversity.
Explanation:
Not all species will die, and the ecosystem will definitely not stay the same after the fire. But, most of the species will live and the ecosystem will just have less biodiversity.
Answer: A
Explanation: Though some of the species will die. if it is a natural fire it means that some species will die for a reason. But the rest of the species will live.