Help need pls and thanks
Answer:
Explanation:
1 is c
Two morphologically identical Drosophila populations live in Lower Nahal Oren, Mount Carmel, Israel. There are two slopes of a valley that face each other and drosophila live on both slopes (they share a common ancestor). The environment is very different even though they are very close. In the center of the valley is an area in which flies from each side have an opportunity to mate. (an aside: This is frowned upon by fly society buy these tiny Montagues and Capulets persist). Evaluate each scenario:
Answer:
There are two possible scenarios
Scenario 1) Genetic flow is acting on these populations
Scenario 2) The original population has recently diverged
Explanation:
Scenario 1:
These two populations of flies should probably express some phenotypic difference due to the environmental condition on each slope. Remember that the phenotype is the product of interaction between the genotype and the environment. However, the difference between populations would exist if they were isolated and separated by an ecological or biological barrier. The barrier would impede genetic flow, and each population would have its particular genetic charge and phenotype.
In the exposed situation, we know that each population inhabits a slope. And that the slopes differ in the environmental conditions. But in the center of the valley, these two populations get to meet and mate. The valley is acting as a corridor between both groups and allows the genetic flow to occur.
Let us remember that gene flow is an evolutive strength only if
there exists migration from one population to the other, and the allelic frequency in one generation is different from the allelic frequency in the next generation.Genetic flow acts homogenizing the allelic frequencies between the two populations, and it might introduce variability into the new one. For genetic flow to be possible, there needs not only the movement of the genes from one population to the other but also the reproduction process on the new population. Hence, it involves an interaction between the dispersion pattern and the reproductive system.
Individuals from both groups get to mate in the valley, leaving fertile offspring. The offspring, carrying genes from both populations, are included in one or the other group, where they will reproduce. In each population, the frequency of genes of the other group increase with time as the flies keep mating. Eventually, genetic flow homogenizes the variability between both populations, making them look similar.
Scenario Two:
It might be an early dispersion event in which the common ancestor of both populations used to inhabit the center of the valley. With time, and as the original population got bigger, dispersion took a significant role. Flies began moving into both slopes. Even though each area has different environmental conditions, there has not been enough time for these animals to adapt morphologically to each side, so they still look identical. Also, as it is an early event, these two new groups are not separated yet, so they have not developed biological barriers between them, and individuals can still mate in the center of the valley.
Which one of the following is used to determine absolute age?
What are two pieces of information that a Punnett square can give you?
Answer:
summarise of possible combinations of maternal alleles with paternal alleles.
Can be used to examine the genotypical outcome probabilities of the offspring of a single trait (allele), or when crossing multiple traits from the parents.
3. Chemicals in the air can combine with rain to produce acid rain, which is harmful to the environment. Which of these is most likely to be the pH of acid rain?
A. 0
B. 4
C. 10
D. 14
why is the naked mole rat so weird?
Doctor Purita told The New York Times that he would not give HGH to his professional athletes because he doesn’t “need the stigma and that kind of reputation.” What does he mean in this quote?
Answer:idont no the answer
Explanation:
habitat loss in fragmentation definition
In the world of purple people eaters, one eye (E) and one horn (H) are dominant traits. Purple people eaters
can also have two eyes (e) and two horns (h), which are recessive traits.
Perform a dihybrid cross among a male who is heterozygous for both traits and a female
who is heterozygous for both traits. Use the results for your prediction below.
HOW MANY ONE-EYED TWO-HORNED PURPLE PEOPLE EATERS ARE THERE?
O 3
1
0
Ο Ο Ο
16
9
O4
12
the answer is 16 because its like greater then you now what am saying its the correct answer
The two strands of the DNA are antiparallel to each other such that at the end of the DNA one strand will be 3' paired with a 5' end.
a. True
b. False
Answer:
True
Explanation:
Two strands of DNA are antiparallel to each other because they appear in opposite direction and are mirror image and they are read in 5' - 3' direction which also refers to the orientation of nucleotides of a single strand of DNA and the reading would start from the free phosphate and it will end at the hydroxyl group
Which of these is NOT located on the ANTERIOR part of the abdominal aorta:
A.
Inferior mesenteric artery
B.
Celiac trunk
C.
Superior mesenteric artery
D.
Rt gonadal artery
Answer:
D
Explanation:
The option that is not located on the anterior part of the abdominal aorta: ( D ) Rt gonadal artery
The Rt gonadal arteryThe right gonadal artery is a paired artery which each artery rising from the abdominal aorta of each gonad an example of a right gonadal artery is the testicular artery and ovarian artery.
Hence we can conclude that The option that is not located on the anterior part of the abdominal aorta is Rt gonadal artery
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Which of the following pictures is NOT an example of deposition? A. B. Picture C Picture D Picture B Picture A
Answer:
picture A.
Explanation:
Which statement describes how humans can decrease an ecosystem's ability to support life?
A. People cut down the trees in a forest, leaving less habitat for squirrels.
B. People build and put up bird houses, giving bluebirds needed nesting space.
O C. People allow small fires to burn in a grassland, returning nutrients to the soil.
D. People remove non-native species from a lake, allowing other plants to grow.
Answer:
A. People cut down the trees in a forest, leaving less habitat for squirrels.
Explanation:
A large percentage of the depletion of an ecosystem can be attributed to anthropogenic or human activities. Ecosystems are naturally known to support or inhabit life. For example, many trees in an ecosystem are homes to living organisms such as birds, insects, snakes etc.
However, according to this question, an exemplary description of how humans can decrease an ecosystem's ability to support life is when "people cut down the trees in a forest, leaving less habitat for squirrels". This act will decrease the forest's ability to support life.
6. During which month does Albuquerque experience the most precipitation? The least?
Answer: June/November least, August most
Explanation:
The rainy period of the year lasts for 4.8 months, from June 17 to November 10, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around August 1, with an average total accumulation of 1.4 inches.
How is a whale more like a human than a fish? CHOOSE ALL THAT APPLY 1.warm blooded 2.breast feeds its young 3.spends much time out of the water 4.can hold its breath for long periods of time
Answer:
1. warm blooded, 2. breast feed its young
Explanation:
Whales are warm blooded, which means they keep a high body temperature that does not change in the cold water. Fish are cold-blooded, so their body temperature changes depending on the temperature of their environment. AND hales are other mammals that feed their young milk too, although it takes plenty more to feed them than human babies
You are a botanist looking at the plant color in a new breed of Snapdragon. The two parent plants are Blue and Green and when you cross them you make F1 plants that are Cyan in color (a light aqua color). The ratio of offspring is as follows: There were 42 plants with Blue flowers (R1), 39 plants with Green flowers (R2) and 86 plants with Cyan flowers. Is the number of your progeny consistent with a single-gene incomplete dominance inheritance pattern
Answer:
Incomplete dominance is the inheritance pattern where the dominant allele did not mask the recessive allele completely and form a mix of both alleles. Here the inheritance is the incomplete inheritance. The ratio of F2 generation is 1:2:1.
Given:
R1R1 = 42
R2R2 = 39
R1R2 = 86
Total R1 alleles = 2*42+86 = 170
Total R2 alleles = 2*39+86 = 164
Total alleles = 334
Frequency of allele R1 = 170/334 = 0.51
Frequency of allele R2 = 164 / 334 = 0.49
Expected number of each phenotype:
Total population = 167
Blue = R1R1 = 0.51 * 0.51 * 167 = 43.44
Green = R2R2 = 0.49 * 0.49 * 167 = 40.10
Cyan = 2*R1*R2 = 2*0.51*0.49*167 = 83.46
Phenotype Observed(O) Expected (E) O-E (O-E)2 (O-E)2/E
Blue 42 43.44 -1.44 2.0736 0.0477
cyan 86 83.46 2.54 6.4516 0.0773
green 39 40.1 -1.1 1.2100 0.0302
Total 167 167 0.1552
Chi-square value = 0.155
Degrees of freedom = no. of phenotypes – 1
Df = 3-1 = 2
Critical value = 5.99
Chi-square value of 0.155 is less than the critical value of 5.99. So we accept the null hypothesis.
Which statment describes the relationship
between the reactants of photosynthesis
and the products of cellular respiration?
A:Cellular respiration and photosynthesis are
unrelated
B:The reactants of cellular respiration are the
reactants of photosynthesis
C:The products of cellular respiration serve as
the reactants of photosynthesis
D:The products of cellular respiration are the
products of photosynthesis
Answer:
the answer is c. the product of cellular respiration serve as the reactants of photosynthesis
How is it possible that the rocks that were created when the earth formed are no longer part of earth’s crust?
Boulders or even mountains become sediments, including such sand or mud, as a result of erosion and weathering. Chemical weathering, or dissolution, is one type of weathering.
Explain the process of weathering?The breakdown or dissolution of minerals and rocks on the Earth's surface is referred to as weathering.
Agents of weathering include water, ice, acids, salt, plants, animals, and variations in temperature. After a rock has already been fractured, the fragments of rock with mineral are carried away by a process known as erosion. The effects of deterioration and erosion cannot be resisted by any rock on Earth due to its softness. The rocky terrain of Earth is continually being altered by weathering and erosion. Over time, weathering degrades exposed surfaces. How susceptible a rock changing personal weathering is frequently influenced by how long it has been exposed.Lavas, for example, are less prone to deterioration and erosion that rocks that also are exposed to elements like wind because they are soon buried beneath other rocks.
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HELP ON NUMBER 2 AND 6
1) Define biodiversity in your own words:
2) Why is biodiversity important?
Answer:
Explanation:
1.) Biodiversity is variety in an ecosystem and the living things inside of it. It means all the different species and creatures that live on the planet.
2.) Biodiversity is important because it provides vital ecosystem functions such as soil fertilization, nutrient recycling, pest and disease regulation, erosion control, and crop and tree pollination. Each species ina n ecosystem has a role to play.
in an ecosystem, lion eat gazelles and gazelle eat wild grasses. What happen if the population of lion is decline?
Answer: gazelle populaton would increase, and wild grasses would decrease
Explanation: becuase lions are decreasing, less and less gazelles are being eating, giving room for more gazelles to be born, increasing their population, and beause there are more gazelles, they are eating more and more grass, deacreasing the grass.
how are fungal cells different from plant and animal cells?
Answer:
Fungus, A fungus is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from the other eukaryotic kingdoms, those being Plantae, Animalia, Protozoa, and Chromista.
Explanation:
Fungi and animals are very different from each other and classified as completely separate kingdoms. At the cellular level, both animals and fungi are composed of eukaryotic cells. Fungal cells differ from plant cells in that they do not have chloroplasts and cannot carry out photosynthesis to make their own food.
Every living thing belongs to a ___ within an order.
Answer:
class
Explanation:
Are you talking about kingdoms within animals? ¯\_(ovo)_/¯
disturbance destroying an area through the climax of ecological succession
Answer:
hope this helps
secondary succession
Explanation:
Large, low intensity disturbances, such as plowing in conventional agriculture, result in moderate amounts of succession, where species can survive in the soil and quickly recolonize areas after a disturbance. This type of succession is often called secondary succession
Plz help me well mark brainliest if correct!!...
Answer:
A. He invented written language for the blind
Answer:
A
Explanation:
Louis Braille was the man who created the first written language for blind people
Plz help me well mark brainliest if correct!!.....
Why is it difficult for scientists to accurately reconstruct the history of life on Earth during Precambrian time? (check all that apply)
Many of the fossils have been destroyed
Most life was simple and didn’t fossilize well
We can’t dig deep enough
Life didn’t exist back then
Answer:
The second one most life was simple and didn't fozzilize
Three students are arguing about the reason that an apple appears red. Student A claims that it is because an apple absorbs the color red and reflects all other colors away from it. Student B claims that it is because an apple absorbs every other color of light and only reflects red light away from Student C argues that the apple gives off its own rays of red light. With which student do you agree and why?
Answer:
Objects appear different colours because they absorb some colours (wavelengths) and reflected or transmit other colours. ... For example, a red shirt looks red because the dye molecules in the fabric have absorbed the wavelengths of light from the violet/blue end of the spectrum.
Explanation:
Plz help me well mark brainliest if correct!!
Answer:
A
Explanation:
it causes temperatures to rise
Answer:
the answer is all of the above
Explanation:
these are all consequences of climate change
Select ALL of the abiotic factors
lesson 5.01
Question 1 options:
fungi
air
soil
light
salinity
Answer:
light
Explanation:
An abiotic factor is a non-living component in the environment. This can be either a chemical or physical presence. Abiotic factors fall into three basic categories: climatic, edaphic and social. Climatic factors include humidity, sunlight and factors involving the climate. Edaphic refers to soil conditions, so edaphic abiotic factors include soil and geography of the land. Social factors include how the land is being used and water resources in the area. Five common abiotic factors are atmosphere, chemical elements, sunlight/temperature, wind and water.
Temperature and Light

•••
Temperature of the air and water affect animals, plants and humans in ecosystems. A rise in temperature has the potential to change the way a living thing develops, because it changes the metabolic rate of the organism. All living organisms have a tolerance level for temperature range. For example, a human being would die if he stood out in minus 50 degree temperatures for any length of time. Light exposure often affects the temperature. Areas with direct sunlight are warmer