Which of the following results when homologous chromosomes cross over in meiosis?
Two sister chromatids get tangled, resulting in one re-sequencing its DNA.
DNA repair machinery alters maternal alleles so they match paternal ones
Two sister chromatids exchange identical pieces of DNA.
Corresponding segments of non-sister chromatids are exchanged.
When homologous chromosomes cross over in the process of meiosis, the corresponding segments of the non-sister chromatids are exchanged. Thus, the correct option is D.
What is Crossing over?
Meiosis is the process of cell division in which the chromosomal content of the cell reduces to half. This division is also known as reductional division. Meiosis is divided into two parts: Meiosis I and Meiosis II.
Meiosis I is divided into four phases which are Prophase I, Metaphase I, Anaphase I, and Telophase I. Prophase I is further divided into five stages which are Leptotene, Zygotene, Pachytene, Diplotene, and Diakinesis. Crossing over of chromosomes takes place during pachytene stage.
Crossing over or the chromosomal crossover is the exchange of the genetic material during the process of sexual reproduction between the two homologous chromosomes' non-sister chromatids which results into the formation of recombinant chromosomes.
Therefore, the correct option is D.
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can any mountain have a volcano erupt from it?
Answer:
no
Explanation:
Can any mountain have a volcano erupt from it? The easiest answer here is no. However some mountains are volcanoes (Mt Kilimanjaro, Mt Etna….), they can definitely erupt if active or re activated.
At a deep-ocean vent in the Eastern Pacific, the giant tube worms make up which of the following? Select all that apply. a. population b. part of a community c. part of a ecosystem
The giant tube worms make up the following:
PopulationPart of a communityPart of an ecosystemWhat is an Ecosystem?This consists of all the organisms and the physical environment with which they interact.
In an ecosystem, there is the population of organisms which live there together with various communities which was why all of the above were chosen.
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In severe pancreatitis, why does the destruction of the islet cells result in diabetes mellitus?.
Answer:
Type 1 diabetes, formerly known as juvenile diabetes or insulin-dependent diabetes, results from the specific autoimmune destruction of the pancreatic islet beta cells. The subsequent lack of insulin leads to increased blood and urine glucose.
What is meant by wildlife? How is wildlife important for us?
Answer:
Animals that grow or live in the wild without any human interference are known as wildlife. Importance of wildlife is as follows: Wildlife helps keep the food chain in place and thereby maintain ecological stability.
Explanation:
The term "wildlife" refers to all living organisms that exist in their natural habitat, without any human interference. It includes animals, birds, plants, and other organisms that thrive in forests, oceans, deserts, and other natural environments.
Wildlife is important to us in several ways:
1. Biodiversity: Wildlife plays a crucial role in maintaining biodiversity. Each species contributes to the intricate web of life, and the loss of even one species can have a significant impact on the entire ecosystem. For example, bees play a vital role in pollination, which is essential for the reproduction of many plant species.
2. Environmental balance: Wildlife helps to maintain a balance in ecosystems. Predators, such as lions or wolves, help control the population of herbivores, preventing overgrazing and maintaining the health of vegetation. This balance ensures that resources are distributed appropriately and prevents the dominance of a single species.
3. Ecosystem services: Wildlife provides various ecosystem services that benefit humans. Forests, for instance, serve as a habitat for countless species, help regulate climate, filter air and water, and provide resources like timber and medicinal plants. Wetlands act as natural filters, purifying water and reducing the risk of floods.
4. Cultural and recreational value: Wildlife also holds significant cultural and recreational value. Many communities have strong cultural connections to specific wildlife species, and these species may play important roles in their traditions, rituals, and beliefs. Additionally, observing and interacting with wildlife through activities such as bird-watching or safaris can bring joy and a sense of connection to nature.
5. Scientific and educational purposes: Studying wildlife helps us gain knowledge about different species, their behavior, and their roles within ecosystems. This understanding is crucial for conservation efforts and managing natural resources sustainably. Wildlife education also fosters a sense of environmental awareness and encourages people to become responsible stewards of the planet.
Hence, wildlife encompasses the diverse range of organisms found in their natural habitats. Its importance lies in its contribution to biodiversity, environmental balance, ecosystem services, cultural value, recreational opportunities, and scientific knowledge. Preserving and protecting wildlife is essential for the well-being of both the natural world and human society.
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Helpp!! Pleaseee!!
I need two paragraphs explaining how carbon is transferred within and between organisms and the environment.
Answer:
Organisms play an important role in the carbon cycle in the following ways: Plants absorb carbon from the environment in photosynthesis and return it in respiration. Animals obtain their carbon by eating plants; they release carbon in respiration.
For example, in the food chain, plants move carbon from the atmosphere into the biosphere through photosynthesis. They use energy from the sun to chemically combine carbon dioxide with hydrogen and oxygen from water to create sugar molecules.Carbon dioxide is added to the atmosphere naturally when organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossil fuels and forests and the production of cement.
Explanation:
WILL GIVE BRAINLIEST!!
Which research method would be most appropriate for investigating the relationship between the number of hours teenagers sleep and the amount of caffeine consumed on a daily basis?
Case study
Experiment
Laboratory observation
Naturalistic observation
Survey
Answer:
Survey
Explanation:
Because if you think about it carefully you really cant observe it. Your main goal is to compare them and with that we need a survey to get the data from both sides. Leaving us with the Survey
What is black soil best for?
O constructing buildings
O having a wildlife environment
O having a desert environment
O farming land
Answer:
I believe the answer is farming
Answer:
having a wildlife environment
Explanation:
I took the test and this was the correct answer so your welcome
The study of fossils is called Paleontology
True
False
Answer:
True
Explanation:
The answer is fact checked
VIDA chart for biology
Answer:
Yes you are right I didn't get the question too.
Natural gas drilling locations are determined by
a random drilling
b. seismic surveys
C. natural gas dogs
d satellite surveys
Answer:
The answer is b. seismic surveys.
Answer:
B - SEISMIC SURVEYS
Explanation:
True or false? DNA is found in both prokaryotic and eukaryotic cells.
Answer: True
Answer:
True DNA is found in both
Explanation:
Hope this helps
A red blood cell has a diameter of about 7 micrometer. a microscope of resolving power 240nm ,can it resolve the details of the red blood cell of size 7 micrometer
Yes, it resolve the details of the red blood cell of size 7 micrometer because the microscope has more than 30 times magnification power.
What is magnification?Magnification is the ability of a microscope to produce an image of an object at a scale larger (or even smaller) than its actual size so we can conclude that it resolve the details of the red blood cell of size 7 micrometer because the microscope has more than 30 times magnification power.
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Which Florida natural resource is renewable?
Oil
Coal
Wood
Limestone
Answer:
I think the answer is coal
Answer:
C: Wood
Explanation:
Wood can easily be renewed whereas with the others, they take thousands to millions of years to be renewed.
Cells need energy.Give reason?
Answer:
because cell is cell and it is cell
Answer:
Cells need energy to keep them alive. Processes such as cell division, Active transport, and protein synthesis all require energy.
Explanation:
What happens when a piece of DNA is missing?
A.)Genetic information is transmitted
B.)Genetic information is lost
C.)Genetic information is copied
D.)Genetic information is stored
Answer: Genetic information is lost. Genetic information is transmitted.
Explanation:
Why is the enzyme telomerase important in some cells?.
Answer:
✒️ Answer:Abstract. Telomerase is the enzyme responsible for maintenance of the length of telomeres by addition of guanine-rich repetitive sequences. Telomerase activity is exhibited in gametes and stem and tumor cells.
Explanation:
#CarryOnLearning[tex]watch.some.anime[/tex]
Why are organisms classified into different kingdoms? I don't want how they are classified, I just want why they are.
Living things are placed into certain kingdoms based on how they obtain their food, the types of cells that make up their body, and the number of cells they contain. Phylum is the next level following kingdom in the classification of living things.
Answer:
their classified because they have different structures.
you wouldn't want to put a goat in the same group as a insect would you?
Explanation:
Where in the United States and what year was the first documented case?
West Nile virus!
please help me
Answer:
The first reported case happened in Queens, New York in 1999.
"West Nile virus (WNV) has quickly established itself in North America since its recognition in New York City in 1999. Historically, WNV has been associated with temporally dispersed outbreaks of mild febrile illness."
West Nile Virus: An Historical Overview
James J. Sejvar
Ochsner J. 2003 Summer-Autumn; 5(3): 6–10.
PMCID: PMC3111838
3
Which of the following statements are true? Choose more than one
answer.
Oxygen is the most abundant gas in Earth's atmosphere
Gases in the stratosphere protect living organisms from solar
radiation
Wavelength affects the color of light
Gases are thicker in the upper levels of the atmosphere
Not all wavelengths of light are scattered by atmospheric
gases
Earth's atmosphere absorbs blue light most efficiently
Answer:
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Explanation:wfnwkfnskfnds
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Oxygen is the most abundant gas in Earth's atmosphere
Which animal phylum was the first to develop a dorsal nerve cord a backbone?
Answer:
Chordates?
Explanation:
What is the relationship between the curve seen in the graph and the environmental health of the oceans?
An increased population will result in the improved environmental health of the oceans due to more scientists inventing better technologies.
An increased human population size means that the ocean's resources will be used more efficiently.
As the population goes up, the oceans are more likely to be used as a habitat for humans.
As the population increases, more demands are put on the ocean to support human life.
Answer:
As the population increases, more demands are put on the ocean to support human life.
Explanation:
Many countries rely on the ocean for transport and as food sources. Over fishing has continuously been a growing problem as more and more fish are required to sustain populations as well as support more gourmet markets. A higher population will also lead to higher trade rates as more materials that aren't available in one country will need to be imported from others.
Look at this food chain. What would happen if the
salmon were overharvested?
The salmon is a key player in the food web whose removal may cause an imbalance in the whole ecosystem.
What is a food web?A food web is a graphical diagram representing all connections between organisms in a given ecosystem.
Salmon represent the food for different types of animals in a food web, thereby their removal may cause serious harm to the balance of the ecosystem.
Salmon fish is a tertiary consumer because they eat herring which in turn eat zooplankton that eats phytoplankton.
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which of the following is NOT a major part weather?
a. pressure
b. humitidy
c. wind
d. fronts
Answer:
d. fronts
Explanation:
Just took test and got 100%
Which of the following is an example of bioremediation?
a .using microorganisms to clean up an oil spill
b. using bacteria to make yogurt.
c. creating plants that are resistant to bacteria.
d. adding nitrogen-fixing bacteria to the soil before planting crops
Answer:
A: Using microorganisms to clean up an oil spill.
Explanation:
Bioremediation is a subcategory under biotechnology which alters environmental conditions with the usage of living organisms. It's a process that focuses on breaking down contaminants - making it an effective method to clean up oil spills due to its efficiency and affordability compared to other options.
How have hominid skulls changed over time? What are some of the reasons for those
changes?
Answer:
The change from the oblong skull and protruding face of ancient humans (right) to the modern rounder skull and retracted face is associated with a sharper bend in the floor of the brain case (lower left), thought to be caused by increased brain size.
Explanation:
Give brainlist me please
The change from the oblong skull and protruding face of ancient humans (right) to the modern rounder skull and retracted face is associated with a sharper bend in the floor of the brain case (lower left), thought to be caused by increased brain size.
the ___ division of the nervous system tends to prepare the body for flight or fight.
Answer:
sympathetic
Explanation:
PLEASE MARK ME AS BRAINLIEST AND HAVE A NICE DAY :)
two paragraphs
explaining how carbon is
transferred within and
between organisms and the
environment.
Answer:
For example, in the food chain, plants move carbon from the atmosphere into the biosphere through photosynthesis. They use energy from the sun to chemically combine carbon dioxide with hydrogen and oxygen from water to create sugar molecules.
Describe: Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants get rid of carbon dioxide gas through a process called respiration. Carbon dioxide is added to the atmosphere naturally when organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossil fuels and forests and the production of cement. Organisms play an important role in the carbon cycle in the following ways: Plants absorb carbon from the environment in photosynthesis and return it in respiration. Animals obtain their carbon by eating plants; they release carbon in respiration.
Explanation:
Planarians lack dedicated respiratory and circulatory systems because:.
Answer:
There is no need for a special circulatory system as a human has because the flatworm doesn't breathe with lungs and doesn't need to transport oxygen around its body. The flatworm simply diffuses oxygen via its skin. This occurs wherever it may need the oxygen.
Explanation:
roots of trees slows down the breaking of rocks ture or false
Answer: true
Explanation: as roots of the plants grow deep it crushes the rocks causing a mechanical weathering process