Why are matter and energy cycles important to an ecosystem ?
Answer:
Carbon and nitrogen are examples of nutrients. Unlike energy, matter is recycled in ecosystems. ... Decomposers release nutrients when they break down dead organisms. The nutrients are taken up by plants through their roots
Explanation:
Bacteria reproduce in a process called binary fission which of the following is true about binary fission?
Algae can grow out of control when too many nutrients containing ______ and _______ enter the water.
phosophorus and nitrogen
carbon dioxide and oxygen
protein and sugars
(This is 7th grade science)
Answer:
Phosphorus and nitrogen
Convection occurs because heated material becomes ____________________. A less dense and rises B denser and rises C denser and sinks D less dense and sinks
Answer: A less dense and rises
Explanation:
Convection is a type of heat transfer happens when there is a movement of fluid (liquid or gas) in which convection currents are produced due to the movement of hot fluid upwards and cold fluid downwards. This happens as the density of hot fluid decreases due to presence of less number of mmolecules per unit volume. As the hot liquid becomes less dense, it starts moving upwards.
Thus convection occurs because heated material becomes less dense and rises.
What size molecules can pass through a cell membrane by a process called passive transport?
Answer:
diffusion and osmosis
Explanation:
lipid_ soluble substance
through lipid baleyer
through protein channel
Transported proteins carry small substances like water, amino acids, and charged ions. One to fifteen angstroms is the range in molecule size that can pass through the membrane. The easier it is for a molecule to move across the cell membrane, the smaller it is.
What is cell membrane ?All cells have a cell membrane, also known as a plasma membrane, which separates the interior of the cell from the external environment. A semipermeable lipid bilayer makes up the cell membrane. The movement of materials into and out of the cell is controlled by the cell membrane.
Small molecules or ions can traverse the cell membrane passively without the cell providing any energy. The three basic types of passive transport are osmosis, assisted diffusion, and diffusion.
Gases like oxygen and carbon dioxide, as well as small hydrophobic compounds, quickly traverse membranes. Water and ethanol are examples of small polar molecules that can move across membranes, though more slowly.
Thus, The easier it is for a molecule to move across the cell membrane, the smaller it is.
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Please help I'm behind
Answer:
The first answer is rainfall, and the second answer is the last one
Explanation:
1.
Rainfall is measured with a rain gauge in inches/millimeters - Most modern rain gauges generally measure the precipitation in millimetres in height collected on each square meter during a certain period, equivalent to litres per square metre. Previously rain was recorded as inches or points, where one point is equal to 0.254 mm or 0.01 of an inch.
2.
Climate is the weather conditions prevailing in an area in general or over a long period. The other 3 describe the weather conditions in a place for just a week, or day while climate is measured annually (basically over a long time)
Good luck with the rest of your exam, I hope you catch up with all your work and do well :)
What happens inside your body as you an oral report in front of your class? URGENT I need it quick, I will give brainliest!
Answer:
If you get nervous (which could happen alot) it feels like your body temperature is rising but really its not , and your face starts to turn red. And when you do an oral report you use your brain to read off the work and to show your knowledge.
Explanation:
4) After a horrible car wreck, Jamie had a broken ankle, a few minor cuts, scratches, and a
large bruise across her chest from the seatbelt. While at the hospital, they kept checking her left
lung because it kept collapsing.
What systems are affected?
Why?
What is Pedigree?? Can someone help me i need this answer plzzzzzz
Answer:
A pedigree is like a lineage or a recorded ancestry. For example, if a dog has recorded breeding papers it would show you it's pedigree. I hope that helped! :)
Select the correct answer.
Which item is the correct comparison to pathogen?
A.
flora
B.
menace
C.
medicine
D.
germ
2. Name 2 parasitic flatworms.
Explanation:
Both flukes and tapeworms are parasites with vertebrate hosts, including human hosts. Flukes live in the host's circulatory system or liver. Tapeworms live in the host's digestive system.
Answer:
any two flatworms are
1. tapeworm
2. liverworm
Explanation:
hopes it could help you
I need help with this (last question I had had the picture all black)
Answer:
I only know A
I think it's the lap
help plsllsss
question on picture
Answer:
Body temperature
Explanation:
7th Grade Science Yes i will brain list
What is a convection current?
a current in a fluid that results from convection.
What is the role of mRNA in the process of protein synthesis?
Explanation:
Messenger RNA (mRNA) molecules carry the coding sequences for protein synthesis and are called transcripts; ribosomal RNA (rRNA) molecules form the core of a cell's ribosomes (the structures in which protein synthesis takes place); and transfer RNA (tRNA) molecules carry amino acids to the ribosomes during protein ...
How does the size of a bacterial cell compare with an animal cell?
Answer:
hope it helped
Explanation:
Bacterial cells are very small - about 10 times smaller than most plant and animal cells. Most bacterial cells range in size from 0.2 to 10 microns or micrometers (0.0000079 to 0.00039 inches). ... One reason why bacterial cells are so small is that they need a large surface area to cell volume to take in nutrients.
Which of the following is a requirement for a population to be in Hardy-Weinberg equilibrium?
A) The population must be very small
O
B) immigration must outpace emigration
O
C) each allele must be equally beneficial
O
D) There must be a high mutation rate
I think the answer is B. Immigration must outpace emigration. Hope this helps!
Hardy-Weinberg equilibrium is the principle of the genetic variation being constant. Each allele must be equally beneficial for a population to be in equilibrium. Thus, option C is correct.
What is the requirement of Hardy-Weinberg equilibrium?
Hardy-Weinberg equilibrium states the invariant nature of genetic variation when there are no disturbing factors in a population. For an equilibrium condition, the population should have a large size. Each allele must be equally beneficial so that there is no genetic drift.
There should be no immigration or emigration of the organism in a particular population as it affects the generation and individuals. Also, there must be no spontaneous mutations for the variation to occur.
Therefore, each allele must be equally beneficial for equilibrium.
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please help with this question
Answer:
C
Explanation:
the answer is C bc I read this and u can site it in the text
Explain the production of urine, include the processes of Ultra filtration and selective reabsorption.
Answer:
Urine Is 95% Water
Explanation:
The Glomerulus Filters Water and Other Substances from the Bloodstream
The Filtration Membrane Keeps Blood Cells and Large Proteins in the Bloodstream
Reabsorption Moves Nutrients and Water Back into the Bloodstream
. Waste Ions and Hydrogen Ions Secreted from the Blood Complete the Formation of Urine
which is more specific chordata or Eukarya
2. Our sun converts 700 million tons of hydrogen into 695 million tons of helium every
second.
O True
False
Answer:
true
Explanation:
In the African savanna, more wildebeests are born than the environment can support. Which is most likely to happen over a period of years as a result?
The chances for survival of the population are reduced.
New food sources are discovered and become the regular diet.
Individuals that are well suited to the environment reproduce, and those that are not well suited die before they reproduce.
The environment adapts by providing more resources to the growing population, increasing the chances of survival for individuals within the habitat.
Answer: I think the correct answer from the choices listed above is option C. Over a period of years, most likely, individuals that are well suited to the environment reproduce, and those that have lesser adaptations die before they reproduce. Hope this answers the question.
Explanation:
Calculate the mass of an object whose weight is 400 N and acceleration due to
gravity is 10 m/s2
Answer:
40
weight= 400N
acceleration due to gravity= 10m/s2
now
force=m*g
400=m*10
m=40kg
11. Cheetahs have been through a genetic bottleneck; evidence for this is that
A little natural selection occurs in this species.
B. the body is long thin, and graceful.
c. there is very little genetic variability.
D. these cats are members of an endangered species.
E. they originally came from sm all areas of Africa.
Cheetahs have been through a genetic bottleneck; evidence for this is that there is very little genetic variability (Option c).
What is a genetic bottleneck?A genetic bottleneck is a natural process where a population and/or species lost part of this genetic diversity.
A genetic bottleneck is a process that can be caused by catastrophic natural disasters.The genetic bottleneck is evidenced by the lack of genetic variability.In conclusion, cheetahs have been through a genetic bottleneck; evidence for this is that there is very little genetic variability (Option c).
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The DNA sequences below show DNA segments for four different species. DNA SEQUENCES Species A TGG CAA CGG CAG ATT TAG Species B TGG CTA CGG CAG ATT TAG Species C TGC CTA CGG CTG ATT TAG Species D TGG CTA CTG CTG ATT TAG Scientists sometimes use DNA sequences such as these to determine the relatedness of different species. Which of the following is a necessary condition for scientists to use DNA sequences in this way?
Answer: I think it's A: the DNA of all organisms contains the same four bases.
Answer:
It’s C
Explanation:
I took the test
Plz help. WIll give brainliest.
Which describes a difference between a positive and a negative feedback loop?
a.) The output of a system signals the system to disregard the stimulus only in a negative feedback loop.
b.) The output of a system stimulates another cycle of the system only in a positive feedback loop.
c.) The output of a system maintains conditions around a set point only in a positive feedback loop.
d.) The output of a system keeps conditions within the body absolutely constant only in a negative feedback loop.
In what ways is the composition of the sun different from the Earth? Choose all that apply.
The Sun does not have continents.
O The Sun has a thick, solid core.
O The Sun does not have a solid surface
The Sun does not have a solid core.
The Sun has continents known as plasma zones.
Answer:
1,3,4
that's my answerrrr
(Uhm help?) The law of conservation of energy states that when there is an energy transfer or transformation, energy is lost.
Assuming this is a true/false question, the answer would be false.
According to the law of conservation of energy, energy is neither created nor destroyed; it simply changes forms.
Unless you are saying that some energy would be lost as heat, This is true.
Answer:
ae you trying to find the meaning?
Explanation:
The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. The only way to use energy is to transform energy from one form to another.
ex: the cue ball is shot at a stationary 8 ball. The cue ball has energy. When the cue ball hits the 8 ball, the energy transfers from the cue ball to the 8 ball, sending the 8 ball into motion. The cue ball loses energy because the energy it had has been transferred to the 8 ball, so the cue ball slows down.
List 3 organisms that are made of plant cells:
Answer:
Seed Plants
Ferns
Mosses
Thallophytes
Explanation:
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