Identify the types of genetic recombination.
1.____occurs in metaphase I.
2.____occurs during sexual reproduction.
3.____is random chromosome alignment resulting in variation.
4.____occurs in prophase I.
5.____fuses gametes to form offspring with genes from each parent.
6.____exchanges genetic information between non-sister chromatids.
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION :)
Answer:
I think its A
Explanation:
Alternate energy does not require the equipment such as those oil pumpers.
When living things die, why are there only bones remaining after some time?
Answer:
When an organism is buried quickly, there is less decay and the better the chance for it to be preserved. The hard parts of organisms, such as bones, shells, and teeth have a better chance of becoming fossils than do softer parts. One reason for this is that scavengers generally do not eat these parts.
Explanation:
Answer:
ANSWER Decomposers break down dead material.
Explanation:
plz mark brainliest
What does hydroelectric power do?
A.) causes thermal pollution
B.) requires building dams that can harm ecosystems
C.) uses the energy inside an atom's nucleus to generate electricity
D.) releases carbon dioxide into the air
Answer:
a 100 on the test
Explanation:
Answer:
C.)
Uses the energy inside an atom's nucleus to generate electricity
Explanation:
Flowing water creates energy that can be captured and turned into electricity. This is called hydroelectric power or hydropower. The most common type of hydroelectric power plant uses a dam on a river to store water in a reservoir.
26. the first documented patient in a disease epidemic within a population?
A. The suspect
B. The definitive host
C. The carrier
D. The index case
27. During the lab, the time was needed for E. Coli to show some growth after UV light exposure which indicates some DNA repair?
A. 0 second
B. 30 seconds
C. 1 minute
D. 2 minutes
28. Mannitol salt agar is classified as:
A. Enriched medium
B. Selective medium
C. Differential medium
D. A. and b.
E. B. and c.
29. Mannitol salt agar is used to identify & differentiate
A. Fungi
B. Enteric bacteria
C. Staphylococcus
D. Streptococcus
E. Gram (-) cocci
30. The Ingredient in Mannitol salt plate which makes the agar selective is?
A. Salt
B. Glucose
C. Mannitol
D. Bile acids
Answer:
a a c
Explanation:
A farmer often sprays a certain kind of insecticide, a chemical that kills insects, on his plants to prevent locust bugs from eating all of his corn crops. One day there was a random change in the sequence of DNA in a locust egg cell. When the egg cell hatched, the locust was resistant to the insecticide (it would not be killed by it). Since that locust could survive and reproduce, natural selection occurred until the entire population evolved to become resistant.
A) Identify the variation that existed in the insect population. _________________________________
B) Identify the process that created this variation. _________________________________
C) Explain why the variations in the insect population would be passed on to the next generation.
D) Is this locust population likely to survive, why or why not?
Answer:
as they were living in that environment they adopted it and were able to in it ; the population was able to survive because they adopted it
Lymph capillaries Lymph capillaries filter lymph. originate as closed-ended tubes associated with blood capillary networks. cannot be discerned structurally from cardiovascular system capillaries. include layers of smooth muscle for peristalsis. concentrate lymph prior to passing it to larger lymphatic vessels.
Answer:
The correct answer is ''originate as closed-ended tubes associated with blood capillary networks.''
Explanation:
The lymphatic vessel system begins within the tissues in the form of tubes closed at one end called lymphatic capillaries (chyliferous in the intestine). These have an internal endothelial lining, similar to that of blood capillaries. These vessels are found in greater numbers in the skin, the digestive tract, and the respiratory system. The tissue fluid penetrates the lymphatic capillaries by diffusion, with the help of a small indirect pressure gradient, which gives it the arterial pressure. The walls of the lymphatic capillaries offer little resistance to the entry of substances; they are more permeable than capillaries in the blood system. The tiny capillaries form larger vessels, similar to the venules and veins of the blood vessel system. The walls are thinner than those of the veins of the blood system and its valves much more numerous.
Which property (quality) of fossils allows scientists to determine the relative ages of rock layers?
A.Fossils show change over time as species evolve.
B.Fossils form from the remains of living organisms.
C.Fossils are usually found only in sedimentary rock.
D.Fossils can be analyzed to determine their exact age
The property (quality) of fossils allows scientists to determine the relative ages of rock layers are fossils show change over time as species evolve.
What is the minimum age of a fossil?A living being that lived more than 11 thousand years ago is considered a fossil, that is, before the Holocene, which is the current geological epoch. Ancient remains or evidence, but less than 11,000 years old, such as sambaquis, are classified as subfossils.
Chemistry is present in this process, more precisely the element Carbon. The dating of a fossil can be done based on the already known percentage of Carbon-14 (C14) in relation to Carbon-12 (C12) of living matter (without decomposition).
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can someone show Me how you do Math on The periodic Table no links or I will report you
Answer: I won’t put a table link don’t worry
Explanation: “Table Link” Nice nice nice
How would the dynamic of an ecosystem and rate of evolution change there was an unlimited supply of resources, including food, space and water?
Answer:
The population will be large and evolution process is slow.
Explanation:
There will be large population of organisms present in the ecosystem and slow rate of evolution when there is unlimited supply of resources such as food, space and water etc because these resources are needed by the organisms to increase their population. There is also a slow rate of evolution when there are plenty of resources because limited resources also increase the chance of evolution and when there is no competition among organisms, the rate of evolution slower down.
What is the name often given to the force exerted by the first object on a second object?
What does hydroelectric power do?
a.) causes thermal pollution
b.) requires building dams that can harm ecosystems
c.) uses the energy inside an atom's nucleus to generate electricity
d.) releases carbon dioxide into the air
Answer:
B Requires building dams that can harm ecosystems
Answer:
b
Explanation:
HELP!!
Question: Acetylation of histones will prevent transcription from happening
True or False
Answer:
T
Explanation:
Normal mitotic cell division results in each daughter cell having 1/2 the chromosomes
A True
B False
Answer:
B
Explanation:
it should be a whole number and not 1/2
Help please, if you can (I don’t think this is biology but there’s no other subject so ya)
Answer:
I had this test their are 3 heterozygous
Explanation: Because, this has too different allels
How is antigenic drift beneficial for viruses?(1 point)
A) It changes how genes code for antigens.
B) It leads to less mRNA which is easier to copy.
C) It creates a variety of immune responses in the host organisms.
D) It makes them unrecognizable to the immune system.
Answer:
1. Individuals with thicker fur had a survival advantage in the cold environment, allowing these individuals to reproduce more often and create more offspring.
2. random mating
3. The green skin color is being selected over blue skin color.
4. DNA
5. They show intermediate steps in the evolution process.
6. Different islands had very different food resources available, and only individuals that were adapted to eat those food resources survived and reproduced on that island.
7. Those who have traits that help them survive are able to reproduce, and their offspring have those traits, leading to a change in the species over time.
8. It makes them unrecognizable to the immune system.
9. The exposure of human populations to less UV light required a reduction in melanin to produce more vitamin D for healthier bones.
10. the correlation between air pollution and white moth predation
11. It is a biological process that leads a population to have a widespread expression of an advantageous trait.
Answer:It makes the unrecognized to the immune system:)
Explanation:
define organic agriculture production for at least three to five sentences
Answer
Organic farming can be defined as an agricultural process that uses biological fertilisers and pest control acquired from animal or plant waste. Organic farming was initiated as an answer to the environmental sufferings caused by the use of chemical pesticides and synthetic fertilisers.
What are two Earth irregularities that can change the intensity of the seasons?
Answer:the orbit around the sun and the planets tilted axis
Explanation:
The two Earth irregularities that can change the intensity of the seasons include the following:
The orbit around the sun.The planets tilted axis.What is a Season?This is defined as a period of the year that is distinguished by special climate conditions.
The intensity of seasons is usually affected by the earth's orbit around the sun and its tilted axis.
Read more about Season here https://brainly.com/question/12455866
what elements cycle between living and non living organisms?
Explanation:
The ways in which an element—or compound such as water—moves between its various living and nonliving forms and locations in the biosphere is called a biogeochemical cycle. Biogeochemical cycles important to living organisms include the water, carbon, nitrogen, phosphorus, and sulfur cycles.
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Intro to biogeochemical cycles (article) | Khan Academy
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Elements that cycles between living and nonliving things are as follows: water, carbon, nitrogen, oxygen, phosphorus, and sulfur.
BIOGEOCHEMICAL CYCLES:
Elemental substances are examples of matter, which are transferred from one form to another in the ecosystem. The movement of these elements between living organisms and their environment is termed biogeochemical cycle.Elements that are involved in the biogeochemical cycle are as follows: water, carbon, nitrogen, oxygen, phosphorus, and sulfur. This means that these six elements move between living and nonliving sources. Water makes up the most part of the body of living organismsCarbon is a major component of the organic matter of living organismsNitrogen is a key component of nucleic acids and also found in the soil as nitratesPhosphorus is the key component of the energy molecule- ATP in every living organismSulfur is a component of some amino acids, and also released into the atmosphere during burning.Learn more: https://brainly.com/question/1204069
The effect of cholesterol on membrane fluidity at physiological temperatures is to Choose one: A. prevent lateral movement of phospholipids and thereby decrease membrane fluidity in that region. B. maintain membrane fluidity due to exclusion of saturated glycerophospholipids. C. rigidify membranes by forming a complex that bridges the inner and outer leaflets. D. maintain membrane fluidity through its disruption of fatty acid packing.
Answer:
The correct answer is D. maintain membrane fluidity through its disruption of fatty acid packing.
Explanation:
Cholesterol is a steroid lipid and is a constituent of biological membranes. It regulates the fluidity of the membrane (so, option C is not correct). Since cell membranes are composed of another type of lipids, the phospholipids, which form a bilayer, cholesterol distributes between the phospholipid tails and avoids these molecules pack each other forming rigid clusters. Thus, the option which better explains the effect is D. maintain membrane fluidity through its disruption of fatty acid packing.
Genetic movement is also known as genetic what?
Explanation:
Genetic disorders of the central nervous system have a propensity to cause movement disorders or ataxia, as a part of the phenotype, or sometimes as the main phenotypic manifestation. The Online Mendelian Inheritance in Man (OMIM) database lists over 500 entries for disorders of which ataxia or a movement disorder form part. Neurologists should be alert to the possibility that patients with complex disorders involving involuntary movements or unsteadiness may have a genetic disorder.
Only those gene loci with relevance to the practising neurologist will be discussed; a more complete listing of other loci, many of which apply only to individual kindreds, is available in referenced review articles.
HUNTINGTON’S DISEASE
Huntington’s disease (HD) is the prototypic neurogenetic disorder, one of the first to be mapped (1983) and subsequently cloned (1993), and the model on which presymptomatic genetic testing is based.
The clinical triad of movement disorder, psychiatric features, and eventual dementia will be well known to neurologists. Chorea is the first manifestation in about two thirds of patients, initially a mild fidgetiness apparent only to the careful observer, which gradually progresses and may be the only clinical manifestation of HD for several years. Severe chorea may respond well to neuroleptics such as sulpiride. Personality change and eye movement disorders including slow saccades, and head thrusting or blinking to generate saccadic eye movements, are also common early features. A wide range of movement disorders including parkinsonism, loss of postural stability, and dystonia eventually supervene, leading to increasingly functional impairment. Progressive weight loss, often resulting in cachexia, is common. Presentation is usually in the forth or fifth decades, but may be at almost any age. The juvenile onset form of HD may present with parkinsonism, the so-called Westphal variant, while late onset forms may cause chorea alone.
Expansion of a polyglutamine (CAG) trinucleotide repeat beyond the critical threshold of 36 repeats results in disease, and forms the basis of the polymerase chain reaction based genetic test. Expansion size is inversely related to age at onset, but the range in age at onset for a given repeat size is so large that repeat size is not a useful predictor for individuals. Inheritance is dominant with full penetrance, meaning that almost all mutation carriers will eventually develop the disease, except those with 36–39 repeats where penetrance is reduced. Meiotic instability with a tendency to increasing expansion size, particularly during spermatogenesis, provides the molecular basis for the phenomenon of anticipation. Thus, juvenile onset cases with very large expansions usually have an affected father. A small minority (< 1%) of individuals have expansions in an intermediate range (29–35 repeats), believed to be an asymptomatic but unstable pre-mutation range, which may expand to cause disease in offspring. Dentatorubropallidoluysian atrophy (DRPLA), also caused by a trinucleotide repeat expansion, may be difficult to distinguish clinically from early onset HD, and so is usually tested for with HD.
Predictive genetic testing of asymptomatic at-risk relatives of affected patients is governed by international guidelines (see Hanna and Wood on page ii2). Prenatal testing in known mutation carriers is routinely available, while linkage based exclusion testing is available to those at-risk women who do not wish to know their own gene status. The latter depends on termination of a pregnancy where linkage shows the fetus to have the same 50% genetic risk as the mother. Preimplantation diagnosis based on selection of unaffected IVF embryos is available in some centres.
THE DYSTONIAS
Dystonia is a feature of many hereditary neurodegenerative and metabolic disorders. In most of these disorders, dystonia usually occurs in the setting of a broader clinical phenotype, and careful clinical assessment reveals other features such as cognitive involvement, pyramidal signs, or ocular abnormalities.
Primary dystonias
In this group of disorders, dystonia or dystonic tremor is (with the exception of parkinsonism in dopa responsive dystonia (DRD)) the only clinical manifestation, and imaging and pathology are usually unrevealing. These disorders have a genetic basis, with dominant inheritance in most cases. The most important of these disorders to the neurologist are DYT1 dystonia and DRD.
there is more answers for this question and it's more and more so go to https://jnnp.bmj.com/content/73/suppl_2/ii22
What is the type of asexual reproduction that occurs in yeasts?
Answer:
Budding is the asexual reproduction that happens in yeasts
Answer:
budding
hope it helps.
The availability of natural resources in any habitat determines the____of that habitat
A.) intraspecific competition
B.) carrying capacity
Answer:
B, carrying capacity
Explanation:
b/c caring capacity the avability of natural resources in any habitat of the habitat
types of carbohydrates and their functions
Answer:
Carbohydrates give you energy for instance marathon runners will eat a lot of carbs like pasta and bread to give them energy
Explanation:
The dwarf phenotype is recessive to the tall phenotype in pea plants. When one tall plant and one dwarf plant are crossed together, 50% of their offspring are tall, and the other 50% displays dwarfism. What is the genotype of each parent in this cross?
Answer:
Tt (heterozygous tall) and homzygous short (tt)
Explanation:
This question involves one gene coding for height in pea plants. The allele for tallness (T) is dominant over the allele for shortness (tt). This means that dwarf phenotype is recessive to the tall phenotype in pea plants.
According to this question, a tall plant and a dwarf plant (tt) are crossed together. 50% of their offspring are tall, and the other 50% displays dwarfism. This is an equal ratio. Since the dwarf plant can only be "tt", the tall plant must be heterozygous "Tt" to be produced.
Hence, a cross between Tt vs tt will produce ½tall plants and ½short plant.
8. Some humans have attached earlobes, some have detached
earlobes. Is this beneficial, neutral, or harmful? Why?
Answer:
attached earlobes are neutral
Explanation:
there are myths that attached earlobes are a sign of inbreeding but this has been unproven for years. they serve no difference
La Selva Biological Station and the Braulio Carrillo National Park in Costa Rica are an example of La Selva Biological Station and the Braulio Carrillo National Park in Costa Rica are an example of use of island biogeography theory in guiding conservation. poor planning in conservation efforts. use of corridor theory in guiding conservation. use of metapopulation dynamics in guiding conservation.
Answer:
use of corridor theory in guiding conservation
Explanation:
Conservation corridors, also known as green corridors, are small fragments of wildlife habitat that are installed to connect fragmented habitats. It is believed that green corridors can maintain healthy genetic diversity levels by connecting habitat patches that otherwise would be isolated (i.e., these corridors increase gene flow between isolated populations). Thus, green corridors are used to alleviate the harmful effects of habitat fragmentation on population viability. Species that make use of green corridors can be classified into passage users, which occupy corridors during brief periods of time, and corridor dwellers, which occupy corridors during long periods (even all life).
What happens when an increase in heat in Earths systems affects the ice caps?
a
This is describing a negative feedback loop
b
positive feedback loops are good, and create stability in a system
c
With an increase in heat energy into the system, the ice caps will melt, less reflection, more heat, more melting aka positive feedback loop
d
with an increase in heat energy into the system, ice caps will grow, more reflection, less heat, more ice growth
Answer:
C.) With an increase in heat energy into the system, the ice caps will melt, less reflection, more heat, more melting aka positive feedback loop.
Explanation:
Due to increase in the heat, there will be melting of ice caps which eventually lead to increase in water level and less reflection of heat and more increase in heat on earth with is a positive feedback loop
Answer:
c im pretty sure but if not it would most likely be B
Explanation:
How much oxygen does the
atmosphere contain?
O 12%
0 76%
O 35%
0 26%
Answer:
20.95%
Explanation:
By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.
Name how soil and water are negatively affected by food production
Answer:
- Water: salinization due to irrigation, water pollution, etc.
- Soil: erosion (mechanization), porosity, accumulation of harmful pesticides/herbicides, loss of microbe biodiversity, etc.
Explanation:
Improper agricultural practices are associated with the pollution of soil and water. It is well known that the overuse of fertilizers or pesticides/herbicides contaminates both the soil and water and disturbs the composition of nutrients in the soil. Moreover, improper agricultural practices also reduce soil porosity, produce soil erosion and increase soil salinity/alkalinity. Moreover, improper practices may also increase pollution by increasing the concentrations of nutrients and toxic pollutants in both water and crops. Finally, irrigation techniques increase salinity levels in water and soil.
