The two main causes of variation are "mutation" and "genetic recombination".
A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.
Genetic recombination refers to the rearrangement of DNA sequences by the breakage and rejoining of chromosomes or chromosome segments.
Answer:
The two main causes of variation are mutation and genetic recombination in se.xual reproduction.
Explanation:
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_____________________and ______________________are primary lymphoid organs while the _____________________and _______________________are secondary lymphoid organs.
Answer:
Primary lymphoid organs: the bone marrow and the thymus
secondary lymphoid organs: adenoids tonsils spleen
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What is the importance of having the US forest service, the Bureau of Land Managment, the US Fish and Wildlife service, and the National park service?
Answer:
It protects ecosystems, supervises public access of lands, and manages wilderness areas. It supervises public access of lands, manages wilderness areas, and enforces federal wildlife laws.
Answer: ooooooooooo
Explanation:
When two different forms of a virus infect the same cell, the host cell may manufacture viral particles from both viruses to assemble them into a new form of virus. This process is called _____.
When two different forms of a virus infect the same cell, the host cell may manufacture viral particles by a process called antigenic shift.
What is an antigen?An antigen is any molecule or molecular structure that may trigger a suitable immune response in the host.
An antigen can be the target for antibody binding during classical adaptive immune responses.
In conclusion, when two different forms of a virus infect the same cell, the host cell may manufacture viral particles by a process called antigenic shift.
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Which is a type of star system? dim stars solar system planets wobbling stars globular clusters
Globular clusters is a type of star system where the stars are tightly bounded by gravity.
What is a star system?A star system can be defined as small number of stars that orbit around each other and are bound by gravitational force of attraction.
It is also called a stellar system.
Globular clusters is a type of star system with the following features;
It is composed of hundreds or thousands of low-metal old stars. Stars are similar to those in the spiral galaxyStars are tightly bound by gravity.Hence, globular clusters is a type of star system.
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Answer:
D) Globular clusters
Explanation:
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Are there any circumstances in which the daughter cells produced should not be genetically identical?
Are the daughter cells produced by mitosis genetically unique substantive, cannot divide again substantive, have half the DNA of the parent cell substantive, and are genetically identical to each other?
Answer:
At the end of meiosis and cytokinesis, four haploid cells are produced from a single diploid cell. These haploid daughter cells have half the number of chromosomes as the parent cell and are not genetically identical to the parent cell.
What is the genotype of the dad?
What is the genotype of the mom?
What is the genotype ratio among their children?
What is the phenotype ratio among their children?
Answer:
The genotype of the Dad must be X^AY because that's the only possible genotype for a normal male.
The genotype of the mom must be X^AX^a because that's the only way to have a colorblind son while being a normal mom. The colorblind son gets a Y from his dad and X^a from his mom.
The genotype ratio among the children must be 25% heterozygous dominant, 50% homozygous dominant, and 25% heterozygous recessive.
The phenotype ratio among the children must be 75% normal and 25% colorblind.
Cyanobacteria have been engineered to produce isobutanol directly. what advantage does this have over other alternative biofuels? a. it is an inherently renewable fuel source. b. multiple processing steps can be avoided. c. they produce chemical energy through photosynthesis. d. they make a biofuel alternative to gasoline. please select the best answer from the choices provided a b c d
Answer:
B
Explanation:
The advantage of cyanobacteria over alternate biofuels is that multiple processing steps can be avoided.
Cyanodiesel, a byproduct of cyanobacteria, has unlimited growth potential and are used in various fields of biotechnology.
Benefits of Cyanobacteria-derived fuels ?⇒ Transform solar energy into chemical energy by the process of photosynthesis
⇒ Fixing of atmospheric nitrogen, helping in the increase of soil fertility
⇒ Widespread applications in pharmaceuticals and agriculture
The advantage of cyanobacteria to produce isobutanol over alternate biofuels is that multiple processing steps required in biofuel production from other sources can be avoided. So option B is correct.
How are cyanobacteria useful in producing isobutanol?Cyanobacteria are recently been engineered to produce a variety of chemicals, such as ethanol, Isobutanol, and Isoprene, directly from solar energy, carbon dioxide, and water. This makes cyanobacterium a potential new cell factory for the production of energy and chemicals to meet global energy and climate change challenges.
Synthetic cyanobacteria are engineered through heterologous biosynthesis to create value-added chemicals through photosynthesis. Several chemicals have been successfully generated in synthetic cyanobacteria.
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Meaning of biodiversity
Answer:
The variety of life in the world or in a particular habitat or ecosystem
I need help with this.
Answer:
A trench would be formed, a ridge would develop, magma would be released and the crust would separate.
Explanation:
Look at the picture and try to identify the process. Once you have identified the process, think of the landforms formed and what processes are involved. The phrase "seafloor spreading" in the question tells us that this is an oceanic divergence process.
When two oceanic plates diverge (move apart), tensional forces are exerted. Fractures may occur (faulting) near the plate boundary. Magma rises at the zone of divergence (a large fracture between the two plates). It solidifies and builds up to form a mid-oceanic ridge, a central ridge dividing the ocean basin. The cooled magma forms a new sea floor between the diverging plates (sea floor spreading).
For your info, I only gave you the explanations for the options chosen and there are actually more landforms and processes that occur in oceanic divergence. If you want the full explanation of the entire process, let me know.
List and describe the five kingdoms of life. Who developed this system? What is the basis for the divisions? Why is it important to the study of biology?
Answer:
Living things are divided into five kingdoms: animal, plant, fungi, protist and monera. Living things are divided into five kingdoms: animal, plant, fungi, protist and monera.
What are the structures in the nucleus that contain dna?.
"Chromosomes" are the structures in the nucleus that contains the DNA
LITERALLY WILL GIVE ANY AMOUNT OF POINTS HELP Complete the total time column for the table below to assist with answering the
reflection questions. The first one has been completed for you.
.
bya-billion years ago
.
mya-million years ago
1cm=10 million years ago
Time Span
Scale
Total Time
4.6 bya-3.8 bya
460 cm -380 cm
.8 billion years
3.8 bya-2.5 bya
380 cm-250 cm
2500 mya-543
250 cm - 54.3 cm
mya
543 mya-490 mya 54.0 cm-44.0 cm
490 mya-443 mya
49.0 cm-44.3 cm
443 mya-417 mya
44.3 cm-41.7 cm
417 mya-354 mya
41.7 cm-35.4 cm
354 mya-290 mya
35.4 cm - 29.0 cm
290 mya-245 mya 29.0 cm-24.5 cm
245 mya-206 mya
24.5 cm-20.6 cm
206 mya-144 mya
20.6 cm-14.4 cm
144 mya-65 mya
14.4 cm-6.5 cm
.
Hadean Eon
(Precambrian Time)
Archaean Eon
(Precambrian Time)
Proterozoic Eon
(Precambrian Time)
Cambrian Period
Ordovician Period
Silurian Period
Devonian Period
Carboniferous
Period
Permian Period
Triassic Period
Jurassic Period
Cretaceous Period
Hadean Eon (Precambrian Time):
4.6 bya-3.8 bya460 cm -380 cm0.8 billion yearsArchaean Eon (Precambrian Time):
3.8 bya-2.5 bya380 cm-250 cm1.3 billion yearsProterozoic Eon (Precambrian Time):
2500 mya-543 mya250 cm - 54.3 cm1957 million yearsCambrian Period:
543 mya-490 mya54.0 cm-49.0 cm53 million yearsOrdovician Period:
490 mya-443 mya49.0 cm-44.3 cm47 million yearsSilurian Period:
443 mya-417 mya44.3 cm-41.7 cm26 million yearsDevonian Period:
417 mya-354 mya41.7 cm-35.4 cm63 million yearsCarboniferous Period:
354 mya-290 mya35.4 cm - 29.0 cm64 million yearsPermian Period:
290 mya-245 mya29.0 cm-24.5 cm45 million yearsTriassic Period:
245 mya-206 mya24.5 cm-20.6 cm39 million yearsJurassic Period:
206 mya-144 mya20.6 cm-14.4 cm62 million yearsCretaceous Period:
144 mya-65 mya14.4 cm-6.5 cm79 million yearsLearn more about the geological time scale here:
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The structurelabeled two represents in molecule of ?
Answer:
tRNA
Explanation:
the transfer RNA is an RNA molecule that serves as a link between the mRNA and the growing amino acid chain that forms a protein.
A population contains a lot of diversity in genetic traits.
What condition does this describe?
variation
competition
overproduction
differential reproduction
Trucks, houses and swimming pools are measured using:
meters
centimeters
millimeters
quadrameters
Trucks, houses and swimming pools are measured using: millimetres. Thus, option "C" is correct.
How, explain your answer?If it is four millimetres wide on the drawing, then you can divide 16 by 4 to find that every four meters in real life are equivalent to one millimetre in the drawing.
Thus, option "C" is correct.
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Which is a function of the central nervous system? Ingenuity
Answer:
It controls all voluntary movement, such as speech and walking, and involuntary movements, such as blinking and breathing. It is also the core of our thoughts, perceptions, and emotions.
Explanation:
None.
Identify the types of point mutations depicted. leucine (c t a) is transformed to valine (g t a). leucine valine missense mutation nonsense mutation silent mutation
The type of point mutation that is depicted here is missense mutation.
What is missense mutation?Missense mutation is defined as the type of point mutation where by a mistake occurs in the coding of DNA leading to the change of the DNA base pair.
From the example given, leucine (c t a) is transformed to valine (g t a) which is a different base pair.
Therefore, the type of point mutation that is depicted here is missense mutation.
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Answer:
missense mutation. aka the first answer
Explanation:
DNA looks like:
A ball and chain
A chain
A twisted ladder
A ladder
Answer:
DNA looks like a twisted ladder!
Explanation:
It's made up of two linked strands that wind around each other to resemble a twisted ladder in a helix-like shape. Each strand has a backbone made of alternating sugar.
Answer:
DNA looks like a twisted ladder!
Explanation:
It's made up of two linked strands that wind around each other to resemble a twisted ladder in a helix-like shape. Each strand has a backbone made of alternating sugar.
There is a variety of verbal and physical techniques for controlling and restraining animals . List some of the verbal and physical techniques that you use to restrain or control your pet or family pet at homeWhich techniques would you specifically use when you take your pet to a veterinarian and why?
The appropriate restraint is all about empathy, finesse, and technique. There is a problem with the utilized technique for that procedure on that animal for that day if it takes more than two individuals to really hold the animal during any process. The more participants there are, the more threatened the animal will feel and the easier it will be for someone to get hurt.
Why Proper Restraint Techniques used for pets?prevents harmrequired for tests and treatmentsA First Aid Kit should be ready for all bites and scrapes for the animal's and handler's comfort.The New York Department of Health must be notified of any animal bites.Dog Restraint & Handling:
Standing restraint
Put the forearm of one arm, while holding the dog's head, under its neck.To bring the animal closer to the handler, the second arm is wrapped around its body.Useful on a table or the floorUse
Exams in generalRetrieval of SpecimensCut NailsSitting Restraint
The same method as the standing restraint, but with the dog sitting
To stop a dog from backing up, it can be against a wall.
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What are these answers?
Answer:
Plasma membrane- outer boundary of the cell
Nucleus- houses DNA/control center of the cell
Ribosome- cellular structure where proteins are made
Cytoplasm- interior of a cell that maintains cells and shape and contains organelles
Mitochondria- power house of the cell
Chloroplast- organelle found only in plant cell (because it is used for photosynthesis)
Flagellum- hair like structure that enables cell movement
Life used to be organized into two group, plants and animals. What are the 5 kingdoms of life recognized today?*
a. Animal, Fungi, Archaea, Bacteria, Vertebrate b. Protist, Animal, Bacteria, Eukaryote, Archaea c. Plant, Animal, Fungi, Protist, Bacteria
d. Fungi,Vertebrate, Plant, Animal, Bacteria
Answer:
C. Plant, Animal, Fungi, Protist, Bacteria
Explanation:
Another word for bacteria would be monera. The more technically correct version of the answer would be animal, plant, fungi, protist, and monera. However, monera is basically bacteria. So C is your best answer.
Answer:
c
Explanation:
Life used to be organized into 2 groups : plants and animals by Swedish botanist Carl Linneaus. Then it was again classified by American ecologist R. H. Whittaker into 5 kingdoms :
MoneraProtistaFungiPlantaeAnimaliaThe option which lists these options is c (kindly note that bacteria are classified under Kingdom Monera)
The opossum which is native to north america and the kangaroo
Answer:
The opossum, which is native to North America, and the kangaroo, which is native to Australia, are both marsupials.
What kind of organism is an autotroph
Answer:
an organism that can produce its own food using light, water, carbon dioxide, or other chemicals.
Like a Plant
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Did you understand what a control in an experiment was? meowsis
Answer:
A control in an experiment is a replica used to confirm that the results or changes in the dependent variable/s are caused by the independent variable values or treatments. There are different kinds of controls according to the experiment, for example, no treatment can be applied, or for example in laboratory experiments, there are controls to check that the reactives function properly, making a replica with them but without the sample that is being measured.
Explanation:
The primary site of lipid digestion and absorption is the.
Answer:
The small intestine
Explanation:
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Please refer to the passage to
help you answer the problem.
What is the charge of the
electrical impulses sent from
stimuli?
A. Extremely positive
B. Exactly neutral
C. Negative
D. It depends on the location.
The charge of the electrical impulses sent from stimuli is extremely positive. Thus, the correct option is A. The net charge of such electrical impulses is positive because of the positively charged ions of the Na+.
What is an electrical impulse?An electrical impulse may be defined as a nerve impulse that contains an electrical signal which travels throughout the body by the axon terminal.
In the resting potential state, the potential difference is -80mV, while after reaching the electrical impulse it changes to +40mV. This happens due to an electrical imbalance between sodium and potassium influx and efflux.
Therefore, the correct option is A.
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how do density and convection current cause movement on earth?
Why would a civilization choose to live near a river that regularly floods?
o a. the flooding provides extra water for drinking.
o b. flooded rivers have more fish than other rivers.
o c. rivers carve out extra land along the banks after floods.
d. rivers leave fertile soil along their banks after floods.
Rivers with regularly floods leaves fertile soil along their banks which is why a civilization will choose to live near there.
What is Fertile?
This is defined as the ability of land to produce crops and vegetation in abundant quantities.
Flooding washes minerals and humus to the bank of rivers which favors growth of plants which is why option D was chosen.
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a group of primitive cells that have the same number of mitosis all daughter cells that result from mitosis meiosis gametogenesis number of chromosomes the intra cellular environment that provides for both mitosis and meiosis The above meiosis is 1920 single chromosomes knowing that the number of single chromosomes in a gamete is equal to the number of primary cells and one-fourth (1/4) of the total number of cells involved in final mitosis.
Answer:
Mitosis is used to produce daughter cells that are genetically identical to the parent cells. The cell copies - or 'replicates' - its chromosomes, and then splits the copied chromosomes equally to make sure that each daughter cell has a full set.
Explanation: