Answer:
Crossing over occurs during prophase I of meiosis before tetrads are aligned along with the metaphase I.
Which method gives the actual age of a fossil in years?
Answer:
Radiometric dating methodsExplanation:
Researchers use a clock to estimate the date a rock or fossil was produced in order to ascertain its age. Radiometric dating methods, which are based on the natural radioactive decay of specific elements like potassium and carbon, are widely used by geologists to date ancient events.
OAmalOHopeO
awncer this question
https://brainly.com/question/24294790?utm_source=android&utm_medium=share&utm_campaign=question this is the other page of this paper awncer this also plz
Answer:
YES NO YES
Explanation:
Why are most of the functions of the body regulated by negative, rather than by positive feedback
mechanisms?
Answer:
Negative feedback mechanisms actually control a process; it can turn it off, whereas positive feedback accelerates the process, allowing the cell no control over it.
Explanation:
Which of the following is the best definition of pseudoscience?
Explanation:
a collection of beliefs or information that claims to be scientific as it is supposedly gathered by a scientific method,
Which of the following describes a solution that contains a buffer?
• A. Citric acid is added to the solution, but the pH of the solution does
not change.
O B. Distilled water is added to the
does not change.
solution, and the ph of the solution
• C. Acetic acid is added to the solution, and the ph of the solution
becomes lower.
D Sodium hydroxide, a base, is added to the solution, and the pH of
the solution becomes higher.
Answer:
a Citric acid is added to the solution, but the pH of the solution does
not change.
Explanation:
which of these sources add water to lakes
Answer:
what are the sources bff
Explanation:
Answer:
Rain runoff, groundwater, melting snow.
Explanation:
Rain flows through various paths and goes into lakes, carrying various types of small leaves or soil particles along with it into the lake.
Groundwater can also form lakes and is the source of freshwater.
The melting snow is also the source of freshwater that flows and reaches the nearby ponds or lakes present in the nearby areas.
What is the constant of “Which bait works best for a homemade fly trap?” Plz answer quick!!!!
Answer:
Mix scraps of meat (the older, the better) with something sweet (see list below). Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination.
Hope this helps!
Please give me brainliest if this helped you!
Answer:
Mix scraps of meat (the older, the better) with something sweet (see list below). Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination.
Which of the following is found in the 'rungs' of a DNA strand?
A. Phosphate
B. Thymine
C. Uracil
D. Deoxy Ribose
The area where the two chromatid halves of a chromosome
are joined is called a
A. centrosome
B. metaphase plate
C. centromere
D. mitotic spindle
what was invented in the late 16th century that allowed scientists to study organisms at a new level
Answer:
compound light microscope
Explanation:
:)
The light microscope was in the late 16th century that allowed scientists to study organisms at a new level.
Thus, The microscope revolutionized the field of biology by enabling researchers to observe and study tiny structures, cells, and microorganisms that were previously invisible to the eye.
This technological advancement marked a significant milestone in the history of science.
It paved the way for discoveries and insights into the microscopic world of living organisms.
Thus, The light microscope was in the late 16th century that allowed scientists to study organisms at a new level.
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3. What is one thing that can be done to help improve areas that produce a lot of runoff?
Answer: hi, im here to help :3
so, you can either use plants, use pesticides and fertilizers less often or the one thing i know is consider a rain barrel.
Fire suppression has been an official management policy in a variety of Northern Ghana ecosystems. Discuss examples of how this has impacted community composition. Describe how these examples are either consistent or inconsistent with the predictions of the Intermediate Disturbance Hypothesis. Be sure to take into account various aspects of the disturbance regime (e.G. Frequency and intensity).
The answer to these questions are the following:
1. It has been suggested that fire suppression management might increase the area affected by increasing the frequency of high-severity fires in the Idaho-Montana Rockies (USA) and in the chaparral vegetation of California
2. Fire suppression>> alteration of composition, distribution, and density of species
3. Data are consistent with the intermediate disturbance hypothesis
Fire suppression management is a strategy focused on trying to stop wildfires. The fire suppression management strategy has recently been criticized for accumulating dead biomass in fire-prone ecosystems, thereby leading to high intensity and high severity fires when these areas do burn with wildfire. It has been shown that fire suppression may negatively alter the composition, distribution, and density of species (both animals and plants), especially in ecosystems having high-frequency and low-intensity fires.
In the Idaho-Montana Rockies (USA), it has been shown that high-severity fires increased their frequency in the period from 1975 to 2012 than in the period from 1935 to 1974, when the fire suppression management strategy coincided simultaneously with cooler and moister conditions that were conducive to them.
The intermediate disturbance hypothesis states that species diversity is maximized at intermediate-scale disturbances. There are many ecologists that disagree with this hypothesis, indicating that the association between ecological disturbance and species diversity does not follow a unimodal distribution. In the example of the Idaho-Montana Rockies, data are consistent with the intermediate disturbance hypothesis because the intermediate disturbance hypothesis indicates that species diversity is highest in areas that have had an intermediate frequency and scale of disturbances (i.e., a fire suppression strategy might decrease the frequency of wildfires but it increases the risk of high severity fires).
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How does Earth's internal structure contribute to its magnetic field?
A. The inner core is a permanent magnet made of iron, and the liquid
iron in the outer core aligns with that magnet's magnetic field.
B. Convection currents in the core generate a magnetic field, which is
strengthened by convection currents in the mantle.
C. The crust becomes magnetic because of radiation from the sun,
and the resulting magnetic field makes all of Earth's layers
magnetic
O D. Convection currents in liquid iron in the outer core generate an
electric current, which produces a magnetic field.
i think answer D( convection currents in liquid iron in the outer core generate an electric current , which produces a magnetic field)
Hello everyone, I need your help plz
Define the word Microbiology:-
Thx ^_^
Answer:
Microbiology is the study of microscopic organisms, such as bacteria, viruses, archaea, fungi and protozoa. This discipline includes fundamental research on the biochemistry, physiology, cell biology, ecology, evolution and clinical aspects of microorganisms, including the host response to these agents.
it is the branch of biology that studies micro-organisms (very small organisms). ... The scientific study of microorganisms. (biology) The branch of biology that deals with microorganisms, especially their effects on man and other living organisms.
the study of all living organisms that are too small to be visible with the naked eye. This includes bacteria, archaea, viruses, fungi, prions, protozoa and algae, collectively known as 'microbes'.
hope it helps
PLEASE MARK BRAINLIEST
In the plasma membrane, the phospholipid heads Group of answer choices are isotonic and do not respond to water. are hydrophobic and face inward, shielded from water. are hydrophilic and face inward, shielded from water. are hydrophilic and face outward toward the aqueous solution on both sides of the membrane. are hydrophobic and face outward toward the aqueous solution on both sides of the membrane.
Answer:
hydrophilic and face outward toward the aqueous solution on both sides of the membrane
Explanation:
The cell membrane is mainly composed of phospholipids, which are arranged in a lipid bilayer. In general, phospholipids consist of a glycerol unit, a phosphate group, and two fatty acids. In a lipid bilayer, hydrophilic (polar) phosphate heads are always oriented outwards and interact with surrounding water molecules; whereas hydrophobic fatty acid tails are oriented towards the center of the lipid bilayer away from water. It is for that reason that phospholipids are considered to be amphipathic molecules, where fatty acids confer hydrophobic properties and polar phosphate groups confer hydrophilic properties.
Passive transport differs from active transport because Passive
transport does not:
A. require energy.
B. move materials out of the cell.
C. use the concentration gradient.
D. use proteins.
Answer:
i’m not a 100% sure but i think it’s A
Please help 10 points for answers!!
Answer:
1=65
2=50
3=true
Explanation:
To test how fertilizer affects tomato plants, a farmer divided a field of young
tomato plants into 10 plots of equal size. The farmer then put fertilizer on half
of the plots and no fertilizer on the other half of the plots. What is the control
group in this experiment?
Answer:
The plots with no fertilizer
Explanation:
In an experiment, the control group is used as a comparison for the experimental group (the group being actively changed and observed).
So, in this experiment, the control group is the plots with no fertilizer.
This acts as a good control group because it provides a normal standard to show the effect of fertilizer on the tomato plants.
So, the control group in this experiment are the plots with no fertilizer.
The flash patterns of fireflies attract mates of their own species. What type of reproductive isolation is this an example of?
A person who has allergies has a compromised immune system because the body's immune system
attacks its healthy cells.
overreacts to an antigen.
steals nutrients from healthy cells.
responds to mutagens.
Answer:
overreacts to an antigen
perfect 2 minute speech on deforstation
Answer:
A warm welcome to all present here. Today I am going to give a speech on deforestation. Deforestation is the process of cutting down the forest, without replanting them again. The causes for deforestation are to obtain wood and fuel or to use the land for farming, mining or construction. From the time of civilization till now, forest wood is very essential for humans in our day to day life.Explanation:
U can add more if u like it!What is the role of the fungus in the food web shown?
boa constrictor
beetle
- coati
poison dart frog
sloth
strangler fig
fungus fruit bat
A. To recycle molecular building blocks
a
B. To break down photons
C. To gather green light
O D. To convert light energy into chemical energy
Answer:
OptionA because decomposers are associated
Explanation:
The role of the fungus in the food web shown is to recycle molecular building blocks. The correct option is A.
What is food web?A food web is a diagram that depicts the interconnection of various organisms in an ecosystem via the exchange of energy and nutrients.
The food web is made up of several interconnected food chains that represent the flow of energy from one organism to the next.
Fungi are decomposers that play an important role in breaking down organic matter and recycling nutrients in many ecosystems.
The fungus in the food web is most likely breaking down dead plant or animal matter, releasing nutrients like carbon, nitrogen, and phosphorus back into the soil.
These nutrients are then absorbed by plants, which are then consumed by herbivores such as the coati and sloth.
Thus, the correct option is A.
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A sealed Ecosphere is able to perpetually sustain life until what happens? A. Oxygen is depleted. B. The producers use up all the carbon dioxide (CO2). C. Energy makes it to the highest trophic level. D. Necessary minerals become locked in deposits.
Answer:
D. Oxygen is DEPLETED
Explanation:
iT NEEDS OXYEN TO SUSTAIN IN A CLOSED ENVIRONMENT
A sealed ecosphere is able to constantly continue life until oxygen is depleted. The correct option is A.
What is a sealed ecosphere?A sealed ecosphere is a name given to a sealed ecosystem designed and made by Ecosphere Associates, Inc. These are miniature ecosystems in glass containers.
These miniature ecosystems continuously need oxygen to survive, because it contains small plants or mosses, or algae to grow inside.
Thus, option A. Oxygen is depleted is correct.
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Which activity is a way engineers can control erosion?
O A. Testing a body of water near a building site to make sure that it
can support wildlife
B. Using protective barriers to hold the soil on sites exposed by
construction activities
C. Designing buildings that can be maintained using minimal water
and electricity
D. Looking for soil that contains minerals that bind with particular
pollutants
Answer:
B. Using protective barriers to hold the soil sites exposed by construction activities.
Proteins are three dimensional molecules made of strands of amino acids (imagine a ball of string). There are 20 different amino acids used in proteins found in living organisms. Some of these amino acids are polar and others are nonpolar. Where would a series of nonpolar amino acids most likely be located in a protein that is found in the cytosol of an animal cell
Answer:
A series of nonpolar amino acids would most likely be located in the interior region of the tridimensional molecule.
Explanation:
Proteins are formed by linearly arranged amino acids, each with a side chain: the R-group.
Of the 20 different amino acids that compose the proteins, about half of them -10- are non-polar. Their R-groups are not stable if they are in contact with water, meaning that non-polar amino acids are hydrophobic.
When proteins are synthesized, they acquire a three-dimensional structure that makes them more stable. Lineal polypeptides get folded and turn into a shape that makes them more stable in the environment and capable of accomplishing their biological role. When they are in an aqueous media, their bent shape leaves the hydrophilic R-groups in contact with water. The hydrophilic R-groups stick in the center of the polypeptide, facing the protein interior, and avoiding interaction with water.
Which of the following statements explains the importance of carbon in cells? (Choose all that apply)
Carbon affects the function of a cell.
Carbon is a waste product for a cell.
Carbon provides structure for a cell.
Carbon maintains the proper temperature in a cell.
Carbon can easily make bonds with other atoms, allowing biomolecules like DNA and RNA, which are crucial for the development and replication that characterize life, to take on a variety of shapes and functions. Thus, option C is correct.
What is importance of carbon in cells?Carbon is an essential component for all living things. Due to its role in the production of numerous bonds and essential molecules in all living things, carbon is an important chemical.
Due to its unique chemical structure, carbon may combine with numerous other molecules to form a variety of compounds.
Because of its propensity to create stable bonds with other elements, including itself, carbon is the main component of organic molecules.
It makes up roughly 20% of an organism's weight and is necessary for them to survive, develop, and procreate.
Therefore, carbon provides structure for a cell.
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What do these images model?
A atoms
в compounds
C elements
D mixtures
Answer:
b
Explanation:
compounds
7. Why are people from Pacific Island
nations likely to become environmental
refugees?
A. Because of sea level rise due to
climate change
B. Because the fish populations they
survive on are diminishing
C. Because they ve degraded their
Islands and can no longer grow food
D. Because large factories there have
contaminated the soil, increasing cancers
and other health problems
Answer:
For these migrants, economic and cultural reasons were given as motivations for settling abroad. About 37 percent leave to find work, 26 percent for education opportunities and some 18 percent give climate change as their reasons for migration.
What is the constant of “which date works best for a homemade fly trap?”
Answer:
Mix scraps of meat (the older, the better) with something sweet. Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination
A specific defense is a(n)
Answer:
The adaptive immune system.
Explanation:
Recognizes and attacks specific pathogens
Hope this helps!
--Applepi101
