the dna structures
Answer:
Each DNA strand is composed of nucleotides—units made up of a sugar (deoxyribose), a phosphate group, and a nitrogenous base. Each strand of DNA is a polynucleotide composed of units called nucleotides. A nucleotide has three components: a sugar molecule, a phosphate group, and a nitrogenous base. Explanation:
Answer:
are you c a biologist or what
Explanation:
why do you want this answer
Conifers produce seeds in flowers?
In the oceans on either side of the Isthmus of Panama are 30 species of snapping shrimp, 15 species on the Pacific side and 15 different species on the Atlantic side. Species live at different water depths. Morphological and genetic data show that Atlantic and Pacific species that live at similar depths are sister species. Geological evidence indicates that the Isthmus of Panama started rising about 10 million years ago and the oceans were completely separated by the isthmus about 3 million years ago. If the isthmus indeed formed gradually, which of the following patterns of genetic differences is most likely in these species pairs?
A) similar percentages of difference in DNA sequences between all pairs of sister species
B) greater percentage of difference in DNA sequences between sister species that inhabit deep water than between sister species that inhabit shallow water
C) greater percentage of difference in DNA sequences between sister species that inhabit shallow water than between sister species that inhabit deep water
D) greater percentage of difference in DNA sequences among Atlantic species than among Pacific species
Answer:
B) greater percentage of difference in DNA sequences between sister species that inhabit deep water than between sister species that inhabit shallow water
Explanation:
The isthmus formed gradually. About 10 million years ago, the isthmus began to separate the waters from the bottom, and snapping shrimp individuals inhabiting the deepness were separated for the first time. Since their separation, both groups evolved according to their new environment and the pressures acting on them. They started to gradually differentiate from each other, probably suffering many mutations through the years.
About 3 million years ago, the oceans were completely separated by the isthmus, meaning that those animals inhabiting the shallowest areas were the last ones to separate from each other on each side of the isthmus. Since then, they probably also suffered many mutations that drove them to differentiation.
However, as animals inhabiting the shallowest areas were the last ones to separate and, considering the time-lapse between both divergences, the highest degree of genetic difference is expressed by the sister groups inhabiting the deepest areas. Being separated from each other for a much longer time than shallow animals gave them more time to suffer more mutations and differentiate more.
The sister species at the depth of the ocean possesses a greater difference as compared to the sister species in shallow regions. Thus, option B is correct.
Evolution is the process of inheritable changes in the species with natural selection. The species in the close generation have a higher level of similarity in the traits.
What is the relation between the sister species?The sister species are the ones with the similarity in the traits. Thus, have the same ancestors and exhibit a greater percentage of trait similarity.
Atlantic and Pacific species are sister species and have similarities in the DNA sequence.
The isthmus separation is formed later in the ocean. The species present at the deeper range are older and are evolved. The species in the shallow region have less evolution as they are separated later.
Thus, the sister species at the depth of the ocean possesses a greater difference as compared to the sister species in shallow regions. Thus, option B is correct.
Learn more about evolution, here:
https://brainly.com/question/2725702
A ______ is a type of turbine used to capture the energy of moving air. A. geotherm B. windmill C. solar panel D. dam
Answer:
b windmill
Explanation:
A windmill is a type of turbine used to capture the energy of moving air.
Windmills have been used for centuries to power grain mills, water pumps, and other mechanical devices. In modern times, wind turbines are often used to generate electricity on a large scale.
Wind turbines typically consist of a rotor with two or three blades that spin around a horizontal or vertical axis. As the wind blows, it pushes the blades, causing them to rotate and give energy. The rotating blades turn a shaft, which is connected to a generator that produces electricity.
Wind turbines can range in size from small turbines used to power individual homes or businesses to large utility-scale turbines used to generate energy for the grid.
Learn more about turbines at:
https://brainly.com/question/928271
#SPJ7
Describe at least two abiotic and two biotic factors found in this biome. (Desert Biome) How
do these abiotic factors interact with the biotic factors?
Abiotic: the sunlight and water.
Biotic: Plants and insects
Explanation:
Plants such as cactuses can absorb and conserve water in their roots and use the sunlight to grow taller
Insects such as Desert beetles can trap moisture in their thick exoskeletons so they are parched or burned by the sun. They sometimes bury themselves deep in the sand where it's cooler.
The abiotic factors in the desert help the biotic factors survive
The dispersal of food coloring in a beaker of water is an example of what process?
Answer:
this is an example of the process DIFFUSION
____ is the process of cell division that results in the formation of cells with half of the usual number of chromosome?
Answer:
I think
the answer is meiosis
Explanation:
Have a great day
12 Explain How does the scientific use of the word efficiency
differ from the everyday use of the word?
Explanation:
Scientific: the ability to avoid wasting energy or money efforts
how we use it everyday: to to get thing done without a hitch.
I'd say we use it in a very layied back way.
9.
Strand A would normally be found in the
A. plasma membrane
B. ribosome.
Yasuole
nucleus
Answer:
the Nucleus
Explanation:
1. In DNA, the complementary bases are A-T and C-G, what is different about the complementary base pairing rules for RNA?
2. What amino acid is made from the mRNA codon GUA?
3. If the original DNA sequence is TAC-CCC-GAT-CGT, what would the complementary mRNA sequence be?
4. Using the mRNA sequence from number 3, what amino acids will be made from that sequence?
5. What are all the possible codons that would create the amino acid histidine (his)?
6. How many different codons are there that will create arginine (arg)?
7. If the amino acids joined together to make a protein are valine-proline-stop, what is one of the possible sequences of mRNA that could have created it?
A group of students used this diagram to classify three organisms into different kingdoms which table identifies the three kingdoms
Answer:
Answer is c. fungi, protista and plantea
Which of the following does not provide new genetic combinations?
ability of a cell to form the whole organism
Answer:
Totipotency
Explanation:
Totipotency can be regarded as
capability of single cell to divide,develop as well as to form differentiated cells in a living body. This could be found in Meristematic plant cells since they posses the ability to develop into complete plants. Totipotent cells can be formed during sexual and asexual reproduction and these could include spores and zygotes. Some organism can experience totipotency in the sense that cells can dedifferentiate as well as regaining totipotency. Instance of this is plant cutting which used in growing an entire plant.
amount of force times the distance it moves an object
Answer:
Work
Explanation:
Work=Force*Distance
Note: this is physics, not biology
Can someone please help me I have been stack on this question for a while know.
Answer:
Each of the spiders receive different genetic combinations from their parents, and as a result are genetically different from each other.
Explanation:
After the pocket of magma slowly cools, what does the magma become?
A. Intrusive igneous rock
B. Extrusive igneous rock
C. Sedimentary rock
D. Metamorphic rock
Answer:
When magma slowly cools,it becomes an igneous Rock
Explanation:
An intrusive igneous rock is when magma is trapped far down in earth.
Extrusive igneous rock is formed when exits and cools above the surface of earth.
Offer a possible explanation why even identical twins are not exactly alike.
Answer:
Because identical twins are an example of sexual reproduction, which provides different looking offspring
Explanation:
Organisms that are birthed of asexual reproduction are always exactly identical
I need help with 5,6 I’ll reward brainalist + 5 points for correct answer
Answer:
Mitochondria
Multicellular
Please Help! What change do we get in membrane potential as a result of acetylcholine binding to nicotinic receptors on skeletal muscle cells?
Depolarization or Hyperpolarization
Which factor DOES NOT affect the rate of diffusion *
O Particle Size
Temperature
O Concentraxon Gradient
O Particle Color
Ocean currents store energy and help to distribute heat and
Answer:
One way that the world’s ocean affects weather and climate is by playing an important role in keeping our planet warm. The majority of radiation from the sun is absorbed by the ocean, particularly in tropical waters around the equator, where the ocean acts like a massive, heat-retaining solar panel. Ocean water is constantly evaporating, increasing the temperature and humidity of the surrounding air to form rain and storms that are then carried by trade winds. In fact, almost all rain that falls on land starts off in the ocean. The tropics are particularly rainy because heat absorption, and thus ocean evaporation, is highest in this area.
Major current systems typically flow clockwise in the northern hemisphere and counterclockwise in the southern hemisphere, in circular patterns that often trace the coastlines.
Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics.
Explanation:
One way that the world’s ocean affects weather and climate is by playing an important role in keeping our planet warm. The majority of radiation from the sun is absorbed by the ocean, particularly in tropical waters around the equator, where the ocean acts like a massive, heat-retaining solar panel. Land areas also absorb some sunlight, and the atmosphere helps to retain heat that would otherwise quickly radiate into space after sunset.
The ocean doesn't just store solar radiation; it also helps to distribute heat around the globe. When water molecules are heated, they exchange freely with the air in a process called evaporation. Ocean water is constantly evaporating, increasing the temperature and humidity of the surrounding air to form rain and storms that are then carried by trade winds. In fact, almost all rain that falls on land starts off in the ocean. The tropics are particularly rainy because heat absorption, and thus ocean evaporation, is highest in this area.
Outside of Earth’s equatorial areas, weather patterns are driven largely by ocean currents. Currents are movements of ocean water in a continuous flow, created largely by surface winds but also partly by temperature and salinity gradients, Earth’s rotation, and tides. Major current systems typically flow clockwise in the northern hemisphere and counterclockwise in the southern hemisphere, in circular patterns that often trace the coastlines.
Ocean currents act much like a conveyor belt, transporting warm water and precipitation from the equator toward the poles and cold water from the poles back to the tropics. Thus, ocean currents regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth’s surface. Without currents in the ocean, regional temperatures would be more extreme—super hot at the equator and frigid toward the poles—and much less of Earth’s land would be habitable.
What are the advantages and disadvantages of the serial dilution-agar plate procedure?
Answer:
Advantages
- Serial dilution is used in microbiology to estimate the concentration or number of cells/organisms in a sample to obtain an incubated plate with an easily countable number of colonies.
- In biochemistry, serial dilution is used to obtain the desired concentration of reagents and chemicals from a higher concentration.
- In pharmaceutical laboratories, serial dilution is performed to receive the necessary concentration of chemicals and compounds as this method is more effective than individual dilutions.
- In homeopathy, homeopathic dilutions are used where a substance is diluted in distilled water or alcohol. It is believed than dilution increases the potency of the diluted substance by activating its vital energy.
Disadvantages
- An error might occur during the propagation of the sample, and the transfer inaccuracies lead to less accurate and less precise transfer. This results in the highest dilution to have the most inaccuracies and the least accuracy.
- Because serial dilution is performed in a stepwise manner, it requires a more extended period of time which limits the efficiency of the method.
- Serial dilution only allows the reduction of bacteria/cells but not the separation of bacteria/cells like in other techniques like flow cytometry.
- This technique also requires highly trained microbiologists and experts in aseptic techniques.
You have a circular plasmid containing 9 kb of DNA, and you wish to map its EcoRI and BamHI sites. When you digest the plasmid with EcoRI and run the DNA on a gel, you observe a single band at 9 kb. You get the same result when you digest the DNA with BamHI. When you digest with a mixture of both enzymes, you observe two bands, one 6 kb and the other 3 kb in size. Explain these results. Draw a map of the restriction sites.
Answer:
A nick is created between G and A in GAATTC when using Eco R1 site while a nick is generated between G and G in GGATCC when Bam H1 is used. The difference in the nicks created is the main reason you observe two bands when you digest the circular plasmid with a mixture of both
Explanation:
Circular plasmid containing : 9 kb of DNA
Eco R1 and Bam H1 are known as restriction sites in DNA ( i.e. special sequences found in a DNA ) hence they can be specifically cleaved by the restriction enzymes enabling the insertion of a gene. that is why you will get a same result when you digest the Plasmid with either Eco R1 or Bam H1
but A nick is created between G and A in GAATTC when using Eco R1 site while a nick is generated between G and G in GGATCC when Bam H1 is used. The difference in the nicks created is the main reason you observe two bands when you digest the circular plasmid with a mixture of both
bookwidgets.com
Cells Unit Test 705
01:04:11
KAYLEN HAWKINS
QUESTION 17
Endocytosis relies on which two organelles to move molecules into the
cell?
Cell membrane and vesicle
Cell membrane and cell wall
Mitochondria and vesicle
4
Mitochondria and cell membrane
Answer:
Cell membrane and vesicle
What is soil structure?
Answer:
Soil structure is defined by the way individual particles of sand, silt, and clay are assembled. Single particles when assembled appear as larger particles. These are called aggregates.
Explanation:
Aggregation of soil particles can occur in different patterns, resulting in different soil structures. The circulation of water in the soil varies greatly according to structure, Therefore, it is important for you to know about the structure of the soil where you plan to build a fish-farm. Although you may not be able to assemble all this information yourself, the specialized technicians from the soil testing laboratory will be able to provide it after examining your undisturbed soil samples. They will be able to tell you if your soil has bad structure or good structure (pores/capillary canals, network, etc.). They will also be able to tell you about the degree of water circulation or permeability.
6. Calculate the kinetic energy of a baseball thrown by Aroldis Chapman, who holds the world record for fastest pitch. The baseball
has a mass of 0.145 kg and velocity of 47.0 m/s.
a. 3.40J
b. 320 J
c. 6.82 J
d. 160J
Answer:
D
Explanation:
=122
The boxer bunched his fingers into a fist and hit the bag as hard as he could.
1. YES
NO
The farmer placed a bunch of grapes on the table.
2. YES
NO
The florist bunched together a spray of roses to fit into the vase.
3. YES
NO
A bunch of kids raced down the beach and dove into the waves with their boogie
boards.
4. YES
NO
The Brady Bunch was a popular television show in the 70's.
5. YES
NO
At the karate demonstration, the instructor bunched his fingers together and broke
the block of wood.
6. YES
NO
The blankets were bunched up at the foot of the bed.
Answer:
1. bunched means to collect into a tight group
2. bunch means a group of (grapes)
3. bunched means to collect into a tight group
4. bunch means a group of (kids)
5. The Brady Bunch: Bunch is part of their name but it also means a group
6. bunched means to collect into a tight group
7. bunch means a group of (blankets)
Explanation:
Hope this helped, I'm not sure what the exact question is since you didn't put one but I assume you want to know if the word bunched is the same as something so I defined each one for you :)
Which is NOT a function of the stem in plants?
Answer:
abortion of water from the soil
Explanation:
Answer:
Absorption of water from soil
Explanation:
That's what the roots do :)
Why is earth considered an open system and a closed system? (Site 1)
O
Answer:
Open system: has the transfer and exchange of matter and energy in the system's surroundings.
Closed system: has a limit to how much matter is exchanged.
All of Earth's systems are considered open systems, but as a whole, they are closed.
Explanation:
judging from the diagram, tropical cyclones are powered by
Answer:
Based on the diagram, tropical cyclones are powered by cold, high altitude air.