why are Some substances allowed to cross the cell membrane while other substances are not?
Answer:
membranes are semipermeable so only let certain materials in and out; if there are carrier or channel proteins, then passive transport can occur otherwise active transport is required which requires energy.
Explanation:
membranes are semipermeable so only let certain materials in and out; if there are carrier or channel proteins, then passive transport can occur otherwise active transport is required which requires energy.
what are two limits to cell growth
BUKU DL
The illustration below shows translation in progress. The orange structure represents a ribosome and the dark grey ones labelled A and
B represent 2 tRNA. Fill in the blanks in the next sentence and answer the short essay question that follows.
A
5'-AGGGACUAUGAACAUUUACCAACUACGGUGGCGUUAGAC-3'
The final protein will contain
and carries the amino acid
d
tRNA B has the anticodon
amino acids.
Second Letter
PUCU
UAU
UUN
UUUC
UUA
UU
US
UCA
UGG
Shop
Low
CUC
La Coc
ACU
ACC
ACA
ACC
AUC
AUA
AUG
Ly
Explanation:
The illustration below shows translation in progress. The orange structure represents a ribosome and the dark grey ones labelled A and
B represent 2 tRNA. Fill in the blanks in the next sentence and answer the short essay question that follows.
A
5'-AGGGACUAUGAACAUUUACCAACUACGGUGGCGUUAGAC
Was Minato's last name Senju? It was never revealed in the show. Maybe it was in the comics?
Answer:
it was minato namikaze fatther of naruto and husband of the red hared woman and yes it was revealed in the show
Explanation:
Which molecule most likely has the greatest amount of stored energy in a bonds?
Answer:
Explanation:
Pryophosphate bond
i need help with this, it's not really coming to my head and its getting annoying
Answer:
looks really hard
Explanation:
Answer:
Things that are found only in bacteria cells are : circular DNA of the nucleoid, the cell wall of peptidoglycan, and flagella.
Things that are found only in animal cells are: centrosome and lysosomes.
Things that are found only in plant cells are: large vacuoles, cell wall, chloroplasts and specialized plastids.
Dumping raw sewage into a river will reduce the amount of dissolved oxygen in the
water. What effect could dumping raw sewage most likely have on a river ecosystem?
O an increase in cellular respiration due to the rising level of phosphates in the water
O a decrease in water temperature due to the energy transfer from osmosis
O a decrease in aquatic animal populations
O an increase in fish populations
Answer:
The first option "an increase in cellular respiration due to the rising level of phosphates in the water"
Explanation:
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A ________________________________ describes a pattern observed in nature.
Answer:
scientific law
Explanation:
i think this is right
hope it helps
please mark brainliest
Answer:
scientific law
Explanation:
I took the test got it right
How long has the light from a star 125,000 light-years away been traveling to reach Earth?
Answer:
Explanation:
Jan 02Jan 02, 2020 · Question: "How can the light of stars billions of light ye the maximum distance that light can travel in one year in the vacuum of space. Consequently, it takes billions of years for light to travel billions of light ..., 2020 · Question: "How can the light of stars billions of light years away from the earth have reached us if the earth is only thousands of years old?" Answer: Distant Starlight - A light-year is the maximum distance that light can travel in one year in the vacuum of space. Consequently, it takes billions of years for light to travel billions of light ...
How does a catalyst work?
Answer:
A catalyst is a chemical substance that affects the rate of a chemical reaction by altering the activation energy required for the reaction to proceed. This process is called catalysis. A catalyst is not consumed by the reaction and it may participate in multiple reactions at a time.
Explanation:
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Respiration in autotrophic organisms occurs only
during the day.
B) Fungi and monerans carry out aerobic respiration
only.
C) All living organisms carry out some form of
respiration.
D) All autotrophs and heterotrophs require glucose
and oxygen for respiration.
Answer it occurs at night aswell
Explanation:
Does anyone know 1,2,3,4,5,6?
Answer:
1. brown eyes
2.brown hair
3. BH Bh bh and bH
4. brown
5. brown
6. BH Bh
In what organisms are cell walls from
The gene for the hair pattern called a "widow's peak" is dominant. In a population of 100 people, 50 people have a widow's peak. How many people would you expect to be heterozygous for the trait?
50 people because the widow's peak is dominant. Those who don't have a widow's peak do not have the gene.
If the gene for the hair pattern "widow's peak" is dominant, it means that individuals with at least one dominant allele will express the trait. We would expect 50 people to be heterozygous (Ww) for the widow's peak trait.
Heterozygous refers to a genetic condition in which an individual possesses two different alleles for a specific gene. Alleles are alternate forms of a gene that can code for different variations of a particular trait. In a heterozygous individual, one allele is dominant and the other is recessive.
The dominant allele is expressed in the phenotype, meaning it determines the physical appearance or characteristic, while the recessive allele remains hidden and does not show in the individual's observable traits. The notation for a heterozygous trait is typically represented by two different letters, one for each allele (e.g., Aa).
Assuming that "W" represents the dominant allele for widow's peak, and "w" represents the recessive allele.
Given that 50 people in the population have a widow's peak (homozygous dominant, WW), we can deduce that the other 50 people must have the genotype for heterozygous (Ww) to express the trait.
Learn more about Heterozygous trait, here:
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What needs to ocCur for a male to be color blind?
He needs to inherit a copy of the color blindness allele from his father.
He needs to inherit a copy of the color blindness allele from his mother.
He needs to inherit a copy of the color blindness allele from both parents
He needs to inherit a copy of the color blindness allele from either his mother or his father.
Answer:
He needs to inherit a copy of the color blindness allele from either his mother or his father.
If you are experiencing Na channels deactivating the plasma membrane which hyperpolarizes the membrane which sense is being activated?
The options are missing from the question,below are the options.
A) touch
B) smell
C) hearing
D) sight
The correct answer to the question is option D
SIGHT.
If one is experiencing Na channels deactivating the plasma membrane,the sense that is being activated is SIGHT,
this is because in the red blood cell,the light induced isomerization of the moiety retinal rhodoesin produce activated opsin which goes ahead to activate the signal transducing G-protein transducin,this it does by catalyzing exchange of GTP (Guanosine triphosphate) for bound GDP(guanosine diphosphate) on the subunit.
This GTP in turn activates the level of CGMP (Cyclic guanosine monophosphate) phosphodiesterase and it further acts to lower the level of CGMP.
Upon this reduction,it leads to the closing of CGMP-gated Na+ channels and hyperpolarization of the membrane.
Describe where in nature you would see contaminated water actively weathering rocks and how it may differ from non-contaminated water.
Answer:
The contaminated water contains harmful chemicals which results in the cracking of rock.
For example: The feldspar crystals within the granite react with the water chemically to form clay minerals which makes the rock weak and hence result in weathering.
The definition of life science
Answer:
the sciences concerned with the study of living organisms, including biology, botany, zoology, microbiology, physiology, biochemistry, and related subjects.
Where did Margaret Mead live in the 1930s to conduct her study of cultural variation?
Answer:
Margaret Mead lived in New Guinea in the 1930s to conduct her study of cultural variation.
Explanation:
Margaret Mead lived in New Guinea in the 1930s to conduct her study of cultural variation.
What is cultural variation?Cultural variation makes reference to the rich range of cultural practices found in diverse cultures all over the world.
Gender roles, economic systems, and social structure, among a variety of other humanely as possible organized behaviors, all change from one culture to the next.
Margaret Mead conducted actual first-hand observational data of the shared, behavior patterns of several small societies in New Guinea to find out.
Mead chose to live among the people of New Guinea and take part in their activities in order to gain a comprehensive understanding of cultural variation.
Mead was best known as an anthropologist for her research on the nonliterate peoples of Oceania, particularly in terms of psychology and culture.
Thus, in 1930s Margaret Mead lived in new Guinea.
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Which are the main stages of the cell cycle? Select three options.
interphase
mitosis
metaphase
cytokinesis
anaphase
I will look back on my test and whoever is right and if they were both right I will mark the first one that answers brainliest!
PLEEASE HELP!
Answer:
interphase
mitosis
Cytokinesis
Explanation:
three stages of the cell cycle interphase longest part of the cell cycle cell grows and develop and function Parts in our body almost at the end of the interphase DNA and chromosomes double mitosis stage in cell where cell divides into nuclei Cytokinesis the two daughter cells create as the cytoplasm divides each daughter cell has an exact copy of parent cells DNA
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Can someone help? I don’t understand this at all
Answer: a plant with genotype rr will have red phenotype as the dominant, since there are two, same goes for ii, it will have ivory phenotype as the dominant. Meaning the one with ri would be of equal dominance. While the answer to the question on the bottom will be 1/2 or 50/100 chance of the pick one getting picked since, well, there is one of each plant, the possibility will have an equal chance of getting picked.
Explanation: hope this answers some of your questions.
Readiness Test: Natural Selection and Change Over Time
Due 10/16/20 4:00pm
The habitat of the Arctic fox is characterized by low-growing plants and brown dirt in the spring and summer. In the fall and winter, the
landscape is covered in deep snow. This animal has a different color coat in the winter than it has in the summer. What is this an example of?
А
mutation
В.
variation
С
competition
D
adaptation
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true or false: The main reason why living organisms require a constant supply of energy is to maintain themselves in a highly organized state.
Answer:
true
Explanation:
Answer:
True
Explanation:
it's true because
What do tropical rainy and temperate marine climates have in common?
O dry winters
O very few trees
O very hot temperatures
O high levels of precipitation
Which two words are paired correctly?
Overtebrate, endoskeleton
Oinvertebrate, endoskeleton
Overtebrate, autotroph
O invertebrate, autotroph
I NEED ASAP
Answer:
vertebrate, endoskeleton
Answer:
two words are paired correctly is vertebrate, exoskeleton have a good day mine is bad but have a good day
Explanation:
i did the test
what do we call scientists that study plants?
Answer:
The answer to this is: A botanist is someone who studies plants.
Explanation:
What happens during the prophase
the answer is chromosomes become visible the nucleus disappears, the mitotic spindle forms. and the nuclear envelope disappears
Explanation:
I just answered this question for another girl
please give me Braniest. if u need more help ill answer add me
Which is true about Embryonic Stem Cells.
Answer:
They can give rise to all cell types in the organism.
Hope this helps
If you needed to sterilize a mattress, which of the following would be most useful?
Question options:
membrane filtration
phenolics
incineration
UV radiation
carbon dioxide (scCO2)
Answer:
d
Explanation:
How do the Atlantic and Pacific profile differ from one another? Be descriptive of each region of ocean floor?