Answer:
A, Mitochondria
Explanation:
what is the role of a catalyst?
Answer:
Catalysts make such a breaking and rebuilding happen more efficiently. They do this by lowering the activation energy for the chemical reaction. Activation energy is the amount of energy needed to allow the chemical reaction to occur. The catalyst just changes the path to the new chemical partnership
Explanation:
Which of these is a eukaryotic plant cell?
(A) Human liver cell
(B) E.coli bacteria cell
(C) Horse hair cell
(D)Carrot root cell
Answer:
Its D
Explanation:
Between these selections just carrot is a plant.
A euckaryotic cell is a cell that has a nucleus with membrane.
In the root for example we have paranshime cell
Which has one nucleus with membrane so this is the answer.
Hope you understand
Which statement is scientifically based? Mutations rarely occur. All mutations are harmful. Some mutations can be contagious, like infections. Mutations are not passed from parent to offspring.
Answer:
Mutations rarely occur
Explanation:
Did the Test and got it correct have a nice day
The scientific statement is; "Mutations rarely occur."
A scientific statement is a statement that is empirical. This means that the statement can be proven experimentally not just by mere logical reasoning. Science is empirical and does not depend solely on logic.
The statement which is scientifically based according to the options in the question is; "Mutations rarely occur. ."
Learn more: https://brainly.com/question/17106056
if there's 23% cytosine how much adenine
I'm going to tell you how to find the answer yourself so you can figure out other problems like it.
First, DNA is made up of those four nucleic acids. Adenine always pairs with Thymine in DNA. Guanine always pairs with Cytocine.
Therefore, the amount of Adenine will always equal the amount of Thymine in DNA. The amount of Guanine will always equal the amount of Cytocine.
So, if Adenine equals 23% of your sample and Adenine equals Thymine, then Thymine equals 23%.
Add the amounts of Adenine and Thymine. 23% + 23% = 46%
100% - 46% =
That gives you the percentage of Cytocine and Guanine together. Since they are in equal amounts, divide by two and you have the percentage of each.
What are sensory organs and what type of stimuli do these receptors respond to?
Answer:
Heart,Brain,Stomach,Intestines ,Lungs
Explanation:
lets say if ur low on blood your heart would automatically start pumping blood to replace the missing blood
2. How are the circulatory, respiratory and lymphatic systems related to each other? specific.
How long is the Lechuguilla cave?
HELP WILL MARK BRAINLIST !!!
Answer: 9. is D
10. is A
Explanation:
Answer:
the 2 at the top:
1. unicellular cells are made of 1 cell
2. multicellular cells are made of many cells
the middle ones:
very sorry don't know those ones
the last ones:
prokaryote goes to B
eukaryote goes to C
unicellular goes to D
multicellular goes to A
Explanation:
sorry i couldn't help that much :/
Where does the mass come from when growing an oak tree I need to write a paragraph so someone help me
Active transport moves molecules_____their concentration gradient
PLEASE HELP ME i will mark you brainless
Answer:
1. devloped
2. highest- USA lowest- austrailia
3. cause devloped contries have more tech and machinces that create carbon dioxide (like cars)
4. im not sure but one reason could be they are super eco-friendly and they dont have/use as many cars
What type of cell is mostly square or rectangular shaped? *
O A animal
B bacteria
C plant
O D fungus
Answer:
It would be >> C plant cells
what is the difference between stimulus and stimuli
How many days does it take the moon to orbit earth?
A. 36.2
B. 1
C. 23.5
D. 29.5
Answer:
D.29.5
Explanation:
it's takes 29.5 days to orbit the sun
what are some potential consequences of the widespread use of plastic materials
Answer:
Consequences of the widespread use of plastic materials can be an increase in levels pollution and the overflowing of landfills because most plastics are non-biodegradable and can take a very long time to disappear unlike things like paper which are biodegradable.
Why is red light the best for photosynthesis?
Answer:
The primary reasons why LED fixtures emit a lot of red are 1) red LEDs are among the most efficient at converting electricity into photosynthetic photons, 2) chlorophyll strongly absorbs red light, thus it is effective at photosynthesis, and 3) red LEDs are relatively inexpensive
why are region called promoters essential to RNA transcription?
Answer:
A promoter is a region of DNA where transcription of a gene is initiated. Promoters are a vital component of expression vectors because they control the binding of RNA polymerase to DNA. RNA polymerase transcribes DNA to mRNA which is ultimately translated into a functional protein.
hope that helps :)
distinguish these terms
taxonomy and phylogeny
Answer:
Taxonomy is the science/study of classification. Phylogeny is the science/study of evolutionary relationships between organisms.
Answer:
Taxonomy is the study of classification. Phylogeny is the study of relationships between organisms
In the rat, the allele for red eye colour is dominant over the alleles for brown colour. Consider a cross between a rat that is an Hozygote dominant for eye colour and a rat that is an Hozygote recessive for eye colour.
1. Show the parental genetic cross between the two rats.
2. Use a Punnett square to show the F1 (filial generation).
3. Indicate the genotype and phenotype of the F1 generation.
4. With the results of the F1 generation, construct a Punnett square showing the results of an F2 (generation).
5. Indicate the genotype and phenotype of the F2 generation
Answer:
1) RR x rr
2) Shown below
3) 100% Rr with red eyes
4) Punnett square shown (Rr x Rr)
5) 25% of the offspring are h0m0zygous dominant with red eyes (RR), 50% are heterozygous with red eyes (Rr), and 25% are h0m0zygous with brown eyes (rr)
Explanation:
Let's say the allele for red eyes is R and the allele for brown eyes is r.
1. A cross between a h0m0zygous dominant (two copies of the dominant allele, R) and h0m0zygous recessive (two copies of the recessive allele, r) is: RR x rr
2. R R
r Rr Rr
r Rr Rr
The F1 generation is shown in the Punnett square above.
3. The F1 generation are 100% Rr. They are heterozygous. Since red (R) is dominant, the rats all have red eyes
4. A cross between the F1 generation (Rr x Rr) gives the F2 generation
R r
R RR Rr
r Rr rr
5. 25% of the offspring are h0m0zygous dominant with red eyes (RR), 50% are heterozygous with red eyes (Rr), and 25% are h0m0zygous with brown eyes (rr)
An atom of argon contains 18 electrons. Describe how these electrons would be arranged. You may find
it helpful to draw a diagram.
Argon is a gas at 20°C (room temperature). Predict which state neon is at this temperature and give a
reason for your answer.
Answer:
a. The electrons are configured in a 2-8-8 order with 8 valence electrons. There are three full shells.
b. Because Argon and Neon are in the same group, they have very similar properties, so we can guess they would be in the same state. Neon would be a gas.
I would greatly appreciate it if some can Please help me asap!!!
Which kind of root system would more likely benefit a desert plant----a taproot or a fibrous root system? Why?
Answer:
A taproot
Explanation:
A taproot will most likely benefit a desert plant because a taproot is a large long root that gets deep into the soil because in a desert the soul isnt fertile and is also sandy so a fibrous root system would be less beneficial because it will absorb less nutrients and will have a hard time clinging on a sandy soil while a taproot can reach further into the fertile part of the soil.
The cell theory states that all living cells come from pre-existing cells. If that's true then, how did the first cell originate?
1 not enough information is given
2 Nature created the first cell.
3 The first cell originated spontaneously.
4 This postulate of cell theory is false.
Answer:
option 2 and 3 are seems to be correct.
Explanation:
according to our studies the options and 3 are seems to bee correct because the first cell was created by nature not by man or any other organism and the term spontaneously also look to be true. so my answer is that options 2 and 3 are correct.
The electrons are outside the nucleus and have a negative charge?
Answer:
Correct!
Explanation:
Dose any one wanna like make a go og le hangout?
if not than thats fine..
Answer:
I can talk but I'm also in class soooo
Explanation:
Which organelle makes proteins?
*
o
A chloroplasts
O B nucleus.
C ribosomes
O D Golgi apparatus
Answer: RIBSOMES
Explanation:
none
Describe a real-world situation in which the plant might
have too much H,0 or Co, but not enough to carry out
photosynthesis.
Which two statements describe processes most likely to be involved in the
formation of sedimentary rock?
I A. Rivers flow across many miles into a body of water.
OB. A volcano erupts near a coastline.
OC. Tectonic plates push on each other underground.
O D. Windstorms blow regularly near rocky cliffs.
Answer:
the answer would be A and D
Explanation:
Rivers flow across many miles into a body of water
windstorms blow regularly near rocky cliffs.
thanks
Which stage of cellular respiration produces the largest amount of energy?
Stage one
Stage two
They produce an equal amount of energy
The answer is Stage 2
8
Organisms evolve due to changes in their DNA called
A
growing
B cellular respiration
mutations
D
recombination
Answer:
Mutaciones
Explanation:
Los cambios genéticos incluyen mutaciones causados por errores en la replicación del ADN de un organismo
Answer:
b cellular respiration
3 process that directly add carbon dioxide to atmosphere?
Answer:
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