How would the human population be different if crossing over did not happer during meiosis?
Answers
Answer:
Without crossing over, each chromosome would be either maternal or paternal, greatly reducing the number of possible genetic combinations, which would greatly reduce the amount of genetic variation between related individuals and within a species
Explanation:
Answer: Without crossing over, each chromosome would be either maternal or paternal, greatly reducing the number of possible genetic combinations.
Explanation: It would greatly reduce the amount of genetic variation between related individuals and within a species. -socrative
Related Questions
BRAINLIEST+15 PTS-What does it mean when a plant is "pure for its trait'?
Answers
Answer:
Non-N-fixing plants usually benefit from reduced competition in mixed stands compared to pure stands and attain higher biomass and N content per plant
Explanation:
a plant that has a pure trait is homozygous. homozygous traits are either a combination of two dominant alleles or the two recessive alleles. a hybrid would be the opposite, consisting of dominant and recessive alleles, therefore making it unpure (lol sorry) and hybrid.
i hope that made sense!
Nguyen uses a triple beam balance to measure the mass of each rock. Read the values on the balance for rocks X, Y, and Z.
Answers
Answer:
X = 120
Y= 710
Z= 620
Explanation:
The Density of Rocks Part A Nguyen uses a triple beam balance to measure the mass of each rock. Read the values on the balance for rocks X, Y, and Z. Rock Balance Reading of Rock Mass (g) X triple beam part of mass balance with top beam with pointer at 20, middle beam with pointer at 0, and lowest beam with pointer at 1 Y triple beam part of mass balance with top beam with pointer at 10, middle beam with pointer at 0, and lowest beam with pointer at 7 Z triple beam part of mass balance with top beam with pointer at 20, middle beam with pointer at 0, and lowest beam with pointer at 6
y = 710
z = 620
Explain the circumstances when a recessive trait will be expressed.
Answers
Based on these images, what can you say about the tentacles of an octopus and the limbs of a lizard?
Answers
Answer: 4
Explanation:
How did the Industrial Revolution contribute to global climate change?
A. It led to an increased use of alternative fuels other than fossil fuels.
B. It led to an increased use of coal, oil, and other fossil fuels.
C. It led to the release of chemicals that destroyed the ozone layer.
D. It led to the development of nonrenewable sources of energy. (I think it's B. Please correct me if I'm wrong.)
Answers
Answer: You're right its b.
Explanation:
Human activity has rapidly increased the emission of greenhouse gases to the atmosphere. Since the start of the Industrial Revolution, in about 1750, human activities such as burning fossil fuels, including coal and oil, have increased greenhouse gas concentrations in our atmosphere.
50 POINTS!
Energy is transferred into the ecosystem when
1.when bacteria absorbs nitrogen from other organisms
2. dead organisms decay and form organic matter
3. rodent prey on invertebrates
4.plants grow from the soil
Answers
Answer:
2
Explanation:
Energy is transferred between organisms in food webs from producers to consumers.
The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants.
Answer: between organisms in food webs from producers to consumers.
Explanation:
Which of the following is not an example of heredity?
A
Lions show their cubs how to hunt for prey.
B
Bacteria reproduce asexually to create cells identical to the parent cell.
C
A boy who is 5 feet, 10 inches is taller than his father who is 5 feet, 8 inches tall.
D
A red geranium plant is bred with a white geranium plant which produces a pink geranium.
Answers
Answer:
I believe the answer is A - Lions show their cubs how to hunt for prey. Hereidty is having the same genetics are your family member(s).
When lions show their cubs how to hunt for prey, it is not an example of heredity. Thus, the correct option is option A.
Heredity is the process by which features or qualities are passed down through genes from one generation (parent) to the next (offspring). Sexual reproduction is a fairly clear example of heredity. This is so because there is a lot of variety in the inherited traits during this phase.
Errors in DNA copying are the cause of the variance. Variation is significant because it supports heredity and aids in evolution. Gene mutations, how genes interact with the environment, and different genetic material combinations all contribute to variation. Keep in mind that variation can also be produced asexually. These differences, however, are barely perceptible.
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How do volcanoes erupt describe how they erupt in your OWN words
Answers
Volcanoes erupt when a continental-oceanic plates combine piling up the pressure and eventually the magma explode out of the volcano/mountain.
Volcanoes erupt when molten rock called magma rises to the surface. Magma is formed when the earth's mantle melts. Melting may happen where tectonic plates are pulling apart or where one plate is pushed down under another. Magma is lighter than rock so rises towards the Earth's surface.
What effect might a supernova have had on the material in a nebula that led to the creation of our solar system?
Answers
This pedigree diagram shows how a dominant trait is inherited in a family. The red circle and squares represent family members with the trait.
Based on the pedigree diagram, which two people must be heterozygous for the trait?
A. The mother and son
B. The father and mother
C. The son and daughter
D. The father and daughter
Answers
What is an ecosystem and what are its parts and functions?
What can challenge an ecosystem?
What are the roles of the water and food cycles in an ecosystem?
Answers
An ecosystem is a structural and functional unit of ecology where the living organisms interact with each other and the surrounding environment. In other words, an ecosystem is a chain of interactions between organisms and their environment.
Answer:
An ecosystem consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Energy enters the system through photosynthesis and is incorporated into plant tissue.
Parts & Functions Of an Ecosystem
The functions of the ecosystem are as follows: It regulates the essential ecological processes, supports life systems and renders stability. It is also responsible for the cycling of nutrients between biotic and abiotic components. It maintains a balance among the various trophic levels in the ecosystem.
What are the major parts of an ecosystem? An ecosystem includes soil, atmosphere, heat and light from the sun, water and living organisms.
Challenges For An Ecosystem
Some of the primary challenges include, but are not limited to, habitat loss, climate change including sea level rise, and levee stability.
The Role and Function of Water
Water cycle have several impacts on the nature - it takes part in weather, erosion and watering plants.
In short term it is positive, to see green grass and trees, not just bonedry dead nature.
In longer term we can see weather changing, clouds made of tiny drops of water coming and leaving - changing humidity (important for fungi and liches), local temperature changes etc.
Longest takes erosion and it is mostly about changing soils structure and nutritients for plants. Erosion can be also seen on riverbeds - in soft rocks/soils being wider, in harder rocks narrow. Also sedimentation in delta is important for development of border ecosystems.
Water makes organisms live and rocks move, that is the importance of water cycle.
Have a wonderful day! :-)
Explain why cell division is more complicated In eukaryotic than prokaryotic cells
Answers
Answer:
Although prokaryotes divide through binary fission, eukaryotes undergo a more complex process of cell division because DNA is packed in several chromosomes located inside a Cell dividing by mitosis.
Explanation:
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Look at the diagram of the rock cycle below.
Which part of the cycle is missing?
A.
sedimentation
B.
melting
C.
crystallization
D.
mineral integration
Answers
it’s melting
From the diagram of the rock cycle the missing part is ( B ) ; Melting
Magma is a hot liquid/semi-liquid rock that is usually formed under the earth due to high pressure and temperature present in the inner core of the earth. magma is obtained by the melting down of existing rocks ( Igneous, sedimentary and metamorphic rocks ) under high pressure and temperature in the earths core.
Magma is released to the earth surfaces during volcanoes therefore the missing term in the rock cycle is melting
Hence we can conclude that from the diagram of the rock cycle the missing part is Melting.
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Provide an example of a neutral mutation
Answers
The diagram shows a food web in a national park.
A diagram of a food web is shown. Grasses, Aspen Trees, Cottonwood, and Willow are shown at the lowest level, Beaver, rabbit, elk, and mule deer are shown at the second level from the bottom. Topmost level has the coyote and gray wolf. Arrows are drawn from grasses to beaver, grasses to rabbit, grasses to elk, grasses to mule deer, aspen trees to beaver, aspen trees to elk, aspen trees to mule deer, cottonwood to beaver, cottonwood to elk, cottonwood to mule deer, willow to elk, willow to mule deer, beaver to coyote, rabbit to coyote, elk to gray wolf, and mule deer to gray wolf.
What is most likely the effect of unrestricted hunting of gray wolves on the food web of the region?
The vegetation will decrease.
The coyote population will increase.
The beaver and rabbit population will increase.
The elk and mule deer population will decrease.
Answers
where did the name '' hamster'' probably come from?
A. The animal was discovered by a person named Hamm.
B. People thought the animals looked like little hams.
C. It comes from a word meaning ''tiny''.
D. It comes from a word meaning ''to hoard''.
Answers
Answer:European Hamster
Smallest breed
Roborovski hamster
Stout-bodied rodents,
with tails shorter than body length, and have small, furry ears, short, stocky legs, and wide feet.
en.wikipedia.org
Popular breed
Golden hamster
They carry food in their spacious cheek pouches to their underground storage chambers. When full, the cheeks can make their heads double, or even triple in size.
en.wikipedia.org
Explanation:
Need Help!
What conclusion can be drawn about the number of elements the make up the majority of the world in which we live and the total number of elements identified on the Periodic table?
Answers
Answer:
I think what you're reaching for is how the vast majority of the world we live in is comprised of only a few elements on the periodic table (carbon, hydrogen, oxygen, to name a few).
Explanation:
The other molecules identified on the periodic table do exist in nature but in much smaller quantities than those of a select few atoms.
Answer:
Of these 118 elements, 94 occur naturally on Earth. Six of these occur in extreme trace quantities: technetium, atomic number 43; promethium, number 61; astatine, number 85; francium, number 87; neptunium, number 93; and plutonium, number 94.
Explanation:
Why is it that duck-billed platypus is classified as a mammal
Answers
Answer:
The platypus is classed as a mammal because it has fur and feeds its young with milk. It flaps a beaver-like tail. But it also has bird and reptile features — a duck-like bill and webbed feet, and lives mostly underwater. Males have venom-filled spurs on their heels.
Could heterotrophs survive without autotrophs? Could autotrophs survive without heterotrophs?
Answers
Answer:
No they would not be able to survive
Explanation:
Producers are often called autotrophs because they can make their own food. In return, heterotrophs can break down the food molecules to convert their own form of energy. Without autotrophs, heterotrophs
carbon and oxygen atoms can combine to form the gas called carbon dioxide.
Answers
Answer:is true
Explanation:
Carbon dioxide is made up of one carbon atom and two oxygen atoms.
Why do you think the western gorilla’s hands are shaped the way they are? What does the western gorilla use its hands to do?
why do you think the European mole’s hands are shaped the way they are? What does the European mole use its hands to do?
Answers
Explanation:
Gorilla: This is very hard to think about but to like help support the the gorillas body when it's like doing that with its hands
Mole: The way there hands are built, it can easily claw it's way through the ground and get places easier.
Both the animals hands might be shaped the way they are due to the required adaptation for their own environment as it differs from place to place. The gorilla may use their hands to have a faster way of transportation as they move to foraging.
What is foraging?Foraging is a behavior which includes all the methods by which an animal acquires and utilizes sources of energy and nutrients. This also includes the location and resources consumption, as well as their recapture and storage, within the context of the larger community.
The european mole's hands are in that shaped due to the need of survival and to build their shelter. The european mole may use their hands to dig to provide themselves a safe shelter and to hide from predators.
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please help Complete the sentence.
Answers
Answer:
The mutation in the MCR1 gene affected the structure and function of the MCR1 protein.
Which has increased at about the same rate as global temperatures over the past 100 years?
A sunlight reaching Earth
B Volcanic eruptions
C Tree rings
D carbon dioxide
Please help thank you
Answers
Answer: D is the answer.
Explanation: Carbon dioxide significantly impacts the global temperature, and is partially the reason why it has been increasing over the past 100 years.
this is science
the question is what caused the jelly population to increase.
Answers
Lesson Slides
2.2: Evaluating Energy Sources
Due Date
Tuesday, October 27, 2020 11:59pm
Resources
Harnessing Human Energy Glossary
Directions
Use the lesson slides as you work through each activity. These are where you will access all of the resources needed to complete this lesson guide.
Provide your responses in blue areas. Be sure to read and follow all of the directions.
Essential questions (orange) are questions we will keep trying to figure out through the lessons and will be able to answer at the end of the chapter or unit.
Key terms (blue) are important words or terms that you will become familiar with throughout the unit expected to know by the end. These can also be found in the glossary.
Activity 1
Reread the last two paragraphs of the “Energy Inventions” article below and highlight evidence that supports or goes against the claims:
Comparing Solutions
Using solar energy and capturing energy from humans are just some of the exciting ways people are using science to solve energy problems. There is no perfect solution, however. Solar energy relies on the sun and doesn’t work as well in the dark or on cloudy days. For example, if you were using your Little Sun to read at night and it ran out of energy, you would need to wait for the sun to come up so that more energy could be captured and transferred to the battery in your light. Just imagine if the next day was very cloudy! Your energy system would not be able to capture very much energy from the sun, so your light would not stay on for long.
The Little Sun lamp and the Hollow Flashlight have something in common: they get energy from somewhere else instead of making it themselves. In fact, that’s true of every object in the universe. Engineers must think about energy sources as they design their inventions. They must find an energy source that will do a good job of transferring energy to the object. The Little Sun lamp gets energy from the sun, while the Hollow Flashlight gets energy from the human body. There are many other possible energy sources to consider. For example, some devices transfer kinetic energy (energy of motion) from wind, water, or even people to power devices! There isn’t a single right way to provide energy when there’s no electrical grid available, and each source has its strengths and drawbacks. Which energy source would YOU choose?
Which claim do you think is most convincing based on the evidence you have gathered so far?
Activity 2
Ranking Energy Sources for the Rescue Team in the Doc.
Read each Energy Source Card carefully and discuss your questions and ideas about each energy source with your partner.
Next, arrange the cards in order of best to worst energy source options for the rescue team.
When you are finished sorting the cards, answer the question in your Doc.
Best Energy Source ↑
Worst Energy Source ↓
Which energy source did you rank as the best option for the rescue team? Why?
Activity 3
Complete the flashlight Energy Diagram by moving each image to match the form of energy it represents.
Potential Energy
Light Energy
Transfer- to move from one object to another or one place to another
Convert- to change from one type to another
Describe how energy moved through the system. Be sure to include your new vocabulary words where necessary.
Key Concept 4: Nothing creates energy. If something has energy, the energy must have been transferred from something else.
Key Concept 5: Energy can be transferred from one object to another, and energy can be converted from one type to another.
Activity 4- Homework
Complete each scenario by moving each image to match the form of energy it represents. Make sure to COPY (CTRL+C) and PASTE (CTRL+V). Describe how energy moved through the system in the box below the diagram. Be sure to include your new vocabulary words where necessary.
Scenario 1- Power a flashlight with a battery, using energy from the sun as the energy source
light energy
potential energy
light energy
Scenario 2- Power a flashlight with a battery, using energy from fuel (gasoline) as the energy source.
potential energy
potential energy
light energy
Scenario 3- Power a flashlight with a battery, using energy from food as the energy source.
potential energy
kinetic energy
potential energy
light energy
Go back and check that you have answered all questions (written in the blue areas). Then turn in your work on Google Classroom, by 11:59 PM on the day that it is due.
Answers
Answer:
activity 2
Explanation:
someone please help me with this !
i need i and ii done
Answers
Gene banks also preserve cells or organisms that host unusual gene variants — genes with special traits. Those genes might later prove useful when some disease epidemic strikes, when the climate changes or when other factors threaten the survival of plants or animals. Farmers could use the banked deposits — stored cells or tissues — to restore genetic diversity or to introduce traits from other breeds or varieties.
Some gene banks house millions or even billions of plant seeds. One example: the Svalbard Global Seed Vault. It’s located underground on a remote island north of Norway. The San Diego Institute for Conservation Research houses another project, called the Frozen Zoo. Its collection includes cells from thousands of birds, reptiles, mammals, amphibians and fish. The cells stored there might one day be used to help rebuild populations of endangered species.
The Smithsonian and SVF Biodiversity Preservation Project in the United States freezes semen and embryos from rare breeds of domestic animals. The U.S. Department of Agriculture’s Agricultural Research Service (ARS) has an even bigger program. It has almost a million samples of semen, blood and embryos from both common and rare breeds. Such collections serve “as a backup to the United States’ livestock industry,” explains Harvey Blackburn. He’s an animal geneticist. He also manages the National Animal Germplasm Preservation Program at an ARS lab in Fort Collins, Colo.
Gene banks use low temperatures to stop chemical and biological activity that might break down cells. Some banks freeze material in liquid nitrogen at –196° Celsius (-320.8° Fahrenheit). This freezing process replaces water in cells with another fluid, such as glycerol. That fluid minimizes the development of ice crystals. Such crystals could damage cell walls. Later, during thawing, biologists will remove the glycerol or some other fluid and return water to the cells.
Freezing and thawing cells has to be done quickly and carefully so that the material will still be viable after it has warmed back up. But some material requires extra special care.
The sperm from chickens and other poultry, for instance, do not survive the freezing and thawing cycle as well as does the sperm from cows and other mammals. Bird biology partially explains why, says Julie Long. A physiologist, she studies animal reproduction at an ARS lab in Beltsville, Md. Unlike female mammals, hens store sperm for several weeks after a single mating. Then they use those sperm over time to fertilize eggs. So thawed sperm must be very hardy to last such a long while in the female bird’s reproductive tract, she explains.
The shape of the frozen material also can affect how well it survives freezing. Bird sperm looks like a piece of string. That shape makes it more fragile than the sperm of most mammals, which contain a round head and slender tail. Ice crystals can more quickly damage DNA in a bird’s sperm.
But Long and other researchers are working to make the sperm of birds more resilient. “Bird sperm seems to respond better to a very fast freeze,” such as a 200 °C drop in one minute, notes Long. That’s more than three times as fast as the freeze rate necessary to preserve the sperm of mammals.
1.) The scientific name always consists of two words:
Group of answer choices
Genus and species
Family and species
Species and kindom
Domain and species
2.) Puma concolor is the scientific name for an American Mountain Lion, what is the species?
Group of answer choices
Puma
concolor
mountain lion
American mountain Lion
Answers
2.Puma
Which characteristics belong to Whittaker’s classification system ? A)three domains B)six domains C)two kingdoms D)five kingdoms E)five levels F)seven levels G)eight levels
Answers
Answer:
for the lazy gang it is d
Explanation:
Can you answer c and the challenge part please.
Answers
Answer:
QUESTION - 3 ----> Revise & Repeat
A --->How did the Gas Levels Change:
ANSWER ----> O2 = Went Lower, (Decreases)
ANSWER ----> CO2 = Went Higher (Increases)
B ---> The total of O2 & CO2:
O2 = 5.0
CO2 = 7.0
5.0 + 7.0 = 12
ANSWER ------> So, Total Of O2 & CO2 = 12
C ----> Why do the gas levels stop changing in this case:
ANSWER ----> It is because there is no Exchange of Gases, However, the snails died and the gas levels did not change!
QUESTION - 4 ----> Challenge:
ANSWER ----> The Gases were recycled and there were no gases entering or escaping!
Explanation:
Question 3 - REPEAT & REVISE
Question 4 - CHALLENGE
Hope I was able to help you!
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C. Gas levels change because of the frequency
Sorry , I don't understand the challenge
A corn field includes corn plants, mice, hawks, and various insects, fungi, and bacteria. Which nutritional role is correctly paired with organisms that carry out that role?
A. heterotrophs - corn and bacteria
B. producers - insects and fungi
C. decomposers - hawks and bacteria
D. consumers - mice and insects
Answers
Because mice and insects because they both eat from the ecosystem and do not produce anything to benefit or harm the ecosystem while others aren’t correctly paired
Consumers- Mice and Insects is the nutritional role which is correctly paired with the organisms that carry out that role. Thus, the correct option is D.
What are Consumers in a Corn field?Consumers are the organisms which play a vital role in an ecosystem through the regulation of the population growth of the living organisms and providing enough amount of energy to other higher organisms in an ecosystem. The removal of any species in an ecosystem, such as the producer or consumer, from an ecosystem can destabilize that particular ecosystem through overpopulation and lack of food and other resources.
Primary consumers, secondary consumers, tertiary consumers or the apex or higher consumers are the different types of consumers in an ecosystem. These types of consumers are classified according to the trophic level to which they belong in an ecosystem.
Consumers in a corn field are mice and insects.
Therefore, the correct option is D.
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