Answer:
In the founding population, the allele frequency is different from the original bigger-sized population. The size of the new population affects this difference even more. Some of the alleles will tend to increase, while some others will tend to decrease in frequency.
Explanation:
Genetic drift is an evolutive force. It is the random change that occurs in the allelic frequency of a population through generations. Its effects are harder in a small-sized population, meaning that the magnitude of this change is inversely related to the size of the original population.
Genetic drift results in some alleles loss -including the beneficial ones-, while some other alleles get fixated. Low-frequency alleles are the most likely to be lost. The changes produced by genetic drift accumulate in time and results in a loss of genetic variability within a population.
Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure -bottleneck effect- or because of a population split -founder effect-. The bottleneck effect most likely affects smaller populations.
Founder effect refers to the origin of a new population from only a few individuals that are coming from a bigger-sized population. These founder individuals, which are carrying some of the genes of the original population, settle down in a new area and reproduce. The new and small population might or might not be genetically representative of the original one. Some rare alleles might be exceeded or might be lost by complete. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, genetic variability is reduced, and there exists the possibility of developing a peculiar allelic composition. When the number of individuals that originated the new population is low, the founder effect will be very extreme because the genetic drift effects are inversely proportional to the original number of individuals.
What are the masses of gray matter that lie deep within the cerebral hemispheres and that are responsible for regulating intensity and precision of voluntary movement
Answer:
Cerebral cortex.
Explanation:
The masses of gray matter that lie deep within the cerebral hemispheres is called cerebral cortex. The cerebral cortex is responsible for many brain functions such as sensation, perception, memory, association, thought, and voluntary physical action. Damage occur to cerebral cortex can leads to many cognitive, sensory, and emotional difficulties in the body. It is also responsible for regulating intensity and precision of voluntary movement.
Select the correct answer from each drop-down menu. Study the graphs, and then complete the passage. An anomaly in global temperature is a deviation from what is normal or expected. The graph shows that global atmospheric co2 ___(increased exponentially. Remained constant. Increased slightly)in the twenty-first century, and global temperature also increased during the same time. Based on the timeline, these statistics suggest a correlation between climate change and ___(wind energy production. Use of electric cars. Industrial carbon emissions). If the current trend of increasing co2 levels continues, the greenhouse effect will continue to ___(warm the planet. Release gas into space. Destroy carbon dioxide) .
Answer:
Increased exponentially
Industrial carbon emission
Warm the planet
Explanation:
The rapid increase in global CO2 in the 21st century has raised concerns over the lingering effect of global climate change which could result due to the exponential increase in CO2 emission at this time. This rise in global atmospheric CO2 has been observed to have a positive relationship with the level of industrial carbon emission. The rise in emission of industrial carbon has been tipped to be responsible for the exponential rise in global atmospheric CO2. CO2 is a form of green house gas responsible for warming the planet.
Answer:
An anomaly in global temperature is a deviation from what is normal or expected. The graph shows that global atmospheric co2 increased exponentially in the twenty-first century, and global temperature also increased during the same time. Based on the timeline, these statistics suggest a correlation between climate change and Industrial carbon emissions. If the current trend of increasing co2 levels continues, the greenhouse effect will continue to warm the planet.
Explanation:
Plato
A sequence is defined recursively by the formula f(n + 1) = –2f(n). The first term of the sequence is –1.5. What is the next term in the sequence?
Answer:
3
Explanation:
n = - 1.5
f(n+1) = -2f(n)
f(n+1) = -2 * -1.5
f(1+1) = 3
f(2) = 3
Which does not provide for enhanced genetic mixing?
A.Mix-matching
B.Random segregation
C.Crossing over
D.Fertilization that occurs through sexual reproduction
Answer:
A. Mix-matching
Explanation:
Sexual reproduction increases genetic variation in offspring by three main mechanisms: 1-random assortment of chromosomes during meiosis 2-genetic recombination, and 3-random fusion of gametes from different parents. In the first place, the pairs of homologous chromosomes are randomly oriented in metaphase I before they separate in Anaphase I. In consequence, daughter gamete cells receive different combinations of chromosomes. Second, recombination (also called crossing over) refers to the interchange of genetic material between non-sister chromatids during prophase I, thereby also increasing genetic variation in daughter cells. Third, the fusion of two haploid cells (i.e., gametes) in diploid organisms results in the formation of a single zygote cell that develops into a new organism, thereby the process of random fertilization between any two gametes generates different diploid zygotes, increasing thus genetic diversity.
What organisms are in the chlorophyta reichenbach phylum
Answer:
Several species of Chlorophyta live in symbiosis with a diverse range of eukaryotes, including fungi (to form lichens), ciliates, forams, cnidarians and molluscs. i hope this helps
Which of the following parts of the brain is related to controlling water concentration and Osmosis?
A. Basal Ganglia
B. Thalamus
C. Hypothalamus
D. Pituitary Gland
Answer:
The correct answer is - D.
Explanation:
The pituitary gland is the gland that releases the ADH hormone that helps in reabsorption and regulates the osmoregulation and water concentration in the body. Antidiuretic hormone is an important hormone in water concentration regulation.
Hypothalamus is the part of the brain other than the Pituitary Gland that helps in controlling water concentration and Osmosis by controlling pituitary gland.
The correct answer is - D.Pituitary Gland
What are the characteristics of annelidas
Answer:- They are coelemate
-The body is covered with thin curticle
-They are triploblastic
-The have long and segment bodies
-Annelidas are bilaterally symmetrical
In graph two, label A represents the gases hydrogen sulfide, methane, and carbon dioxide. What gases are represented by label B and how do these gas levels relate to the evolution of photosynthetic organisms?
Answer:
Oxygen.
Explanation:
Oxygen is the gas that is increased in concentration due to photosynthetic activities of plants and algae because in the process of photosynthesis, plants and algae absorb carbondioxide gas into the body and as a result, oxygen gas is produced. Some amount of oxygen is used by the plants in the process of respiration while the remaining is released in the atmosphere through stomata.
Drag the tiles to the boxes to form correct pairs.
Match the scenario with the type of weathering in action.
mechanical weathering
chemical weathering
biological Weathering
The root of a huge tree causes cracks in a rocky surface.
>
Part of a cliff breaks and falls due to waves.
>
Acid rain reacts with calcite present in limestone,
Answer:
The root of a huge tree causes cracks in a rocky surface. ---> biological Weathering.
Part of a cliff breaks and falls due to waves. ----> mechanical weathering
Acid rain reacts with calcite present in limestone---> chemical weathering
Explanation:
The root of a huge tree causes cracks in a rocky surface is the example of biological Weathering because in this weathering living organism is involved. Part of a cliff breaks and falls due to waves of water is the example of mechanical weathering because water enters the small pores of rocks and formed cracks when expands. Acid rain reacts with calcite present in limestone is a chemical weathering because acid present in rain water is responsible for the degradation and breakdown of rocks.
Answer:
how it should loook
If constructive interference occurs when two waves are cresting, it will decrease the height of the crest.
True
False
Answer:
True is the answer for your question. Mark me as the brainliest first please.
Explanation:
Answer:
False
Explanation:
I said true because of the other person and it was wrong. Trust me it’s False
Formation of an RNA hairpin cannot be the sole factor in the termination of transcription in prokaryotes. Explain why.
Answer:
As the transcription process proceeds, a variety of secondary structures forms by the nascent RNA. t takes place due to the fact that portions of the transcript as complementary base pairs form.
The transcript could be pause but terminate, the hairpin loop causes RNA Pol to pause. There are two different ways to terminate transcription in prokaryotes
- intrinsic termination: in this no external factors required
- Rho protein termination: binds to end of msg and moves along by ATP hydrolysis to catch up (rho is faster)
520 644 3017
password 12345
iam a teacher
time 2 15
Answer:
What is this?????????????????????????
Difference between plants in a tropical location, a temperate location, or the tundra?
Answer:
a tropical location as an area near the equator a temperate location is any area that that lies between the tropical and polar zones and a tundra is the coldest of all the biomes. Tundra comes from the Finnish word tunturi, meaning treeless plain. It is noted for its frost-molded landscapes, extremely low temperatures, little precipitation, poor nutrients, and short growing seasons.
A patient with osteoporosis (reduced bone mass) may have a history of health issues. One issue could be
not enough skin exposure to the sun to make Vitamin D.
weak ligaments.
an increase in the absorption of calcium in the digestive system.
weak tendons.
Answer:
not enough skin exposure to the sun to make Vitamin D.
Explanation:
The correct answer would be not enough skin exposure to the sun to make Vitamin D.
The body makes vitamin D by being exposed to the sun and this vitamin and its metabolite are quite important in the homeostasis of calcium. Calcium on its own is very essential to the formation of bones in the body.
Hence, when the skin is not adequately exposed to the sun, the body becomes short of vitamin D and this disrupts the homeostasis of calcium and the formation of bones in the body. Thus, osteoporosis, also known as weak bones, may result.
Answer:
(A) not enough skin exposure to the sun to make Vitamin D.
Explanation:
♥☺
In the embryos of a typical dicot and a grass, true homologous structures are:Immersive Reader (1 Point) (a) Coleorhiza and coleoptile (b) Coleoptile and scutellum (c) Cotyledons and scutellum (d) Hypocotyl and radicle.
Answer:
(C) Cotyledons and scutellum
Explanation:
Among the given choice, then embryos of typically dicot and grass, true homologous structure which are called as cotyledons and also scuttellum
The scutellum is cotyledon of monocot seeds and the cotyledon found in the part of the monocot seeds and it obtain more portions of embryo in a fine manner
Need help please …..
why is it a good idea for a bacterial cell to be abel to use glucose first as an energy source then switch to lactose
Answer:
Due to less steps and requires less energy.
Explanation:
The bacterial cell is able to use glucose first as an energy source then switch to lactose because glucose requires less steps and less amount of energy for the break down as compared to lactose. If lactose is the only sugar available to the bacterial cells, then bacterial cells will use it as energy source for the production of energy. In order to use lactose, the bacteria must express the lac operon genes, which encode the main enzymes for lactose uptake and metabolism.
True or false: Drug resistance only arises from an organism gaining the genetic information for the resistance from another organism.
Drug resistance only arises from an organism gaining the genetic information for the resistance from another organism.
Answer: True
Someone, please help
Answer:
i dont knwo sorry ;(((((
Explanation:
I really do not know sorry
Francis was recording plant heights for an experiment. Each time that she took a measurement, she wrote it down. Then,
she measured the plant again and compared the new measurement to the one that she had recorded in her notebook.
What was she most likely trying to do?
revise her hypothesis
check her memory
O make the data more valid
O form a conclusion
Answer:
c make the data more valid
Explanation:
what use are the descending branches of glacial plants to them?
Answer:
Explanation:
A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. Glaciers slowly deform and flow under stresses induced by their weight, creating crevasses, seracs, and other distinguishing features. They also abrade rock and debris from their substrate to create landforms such as cirques, moraines, or fjords. Glaciers form only on land and are distinct from the much thinner sea ice and lake ice that forms on the surface of bodies of water.
True or false: Antiviral drugs prevent penetration into a host cell, block transcription and translation, and prevent maturation of viral particles.
Answer:
true
Explanation:
because anti viral drugs stop the maturiy of the virus spreading faster so they supress it
A student drew this model to show the gas exchange in the human body. a diagram of the transport of oxygen and carbon dioxide around the body in the blood, from the lungs to the organs and again to the lungsPart B What are the weaknesses or inaccuracies in the model the student created?
Answer:
Then the blood is pumped through the pulmonary artery to the lungs, where it picks up oxygen and releases carbon dioxide.
Explanation:
please mark as brainliest please please please
Answer:
One strength of the model is that it clearly shows which gases are taken in and which gases are released for exhalation.
Explanation:
PLATO ANSWER
A state in which an object is in motion. OA. static B. dynamic OC. vector OD.scalar
Answer:
the answer is gonna be c
Explanation:
that is all
is an avocado a fruit?
Write two sentences or clues, one for each word, that will help you remember the difference between actin and myosin. (Example: Actin is actively pulled)?
Answer:
The correct answer is -
Actin produces thin contractile filaments within muscle cells,
Myosin produces the dense contractile filaments within muscle cells
Explanation:
Actin is a globular protein that makes actin filaments by arranging in the long spiral chain or produces thin contractile filaments within muscle cells. It is found in cell cytoplasm as well as in the nucleus in eukaryotic cells.
Myosin is a motor protein that produces the dense contractile filaments within muscle cells and plays role in generating movement and force from chemical energy.
Is insurance a primary secondary or a tertiary thing and which is banking
Answer:
tertiary thing
Explanation:
tertiary sector dilivers products from secondary sector to end users
Arrange the following sequence of events in the reproduction of flowering plants:
Germination, seed formation, fertilization, Pollination, dispersal of seed
Answer:
Pollination →Fertilisation → seed formation → dispersal of seed → Germination
Explanation:
This is the correct sequence of events in the reproduction of flowering plants.
Kaji pernyataan berikut.
Pertumbuhan bakteria adalah lebih baik dalam keadaan gelap daripada keadaan bercahaya.
(a) Nyatakan satu pernyataan masalah daripada maklumat di atas. [1 markah]
(b) Cadangkan satu hipotesis untuk menyiasat pernyataan di atas. [1 markah]
(c) Berdasarkan pernyataan yang diberi, reka bentuk satu eksperimen makmal untuk menguji hipotesis anda menggunakan dua piring petri steril dengan penutup berlabel X dan Y, dawai gelung, larutan kultur bakteria Bacillus sp., agar-agar nutrien steril dan pita selofan.
Huraian anda harus mengandungi aspek berikut:
(i) Tujuan eksperimen [1 markah]
(ii) Mengenal pasti pemboleh ubah [2 markah
(iii) Prosedur dan kaedah [4 markah]
(iv) Penjadualan data [1 markah)
Answer:
i didn't understand yiur language
What is the rapid change in a membrane's potential caused by the depolarization of a neuron?
A.Action power
B.Movement potential
C.Action potential
D.Neuron power
Answer:c it’s the answer
Explanation:
C
