Answer:
Concentration gradients:
Passive transport: In favor ----> Simple Diffusion and facilitated diffusionActive transport: AgainstPhospholipid bilayer
Passive transport: Small particles or molecules can pass through the membrane----> Simple diffusionActive transport: Big particles or molecules need proteins to pass from one side to the other of the membraneMembrane proteins
Passive transport: Channel proteins in favor of electrochemical gradient---> Facilitated diffusionActive transport: Transporters or carrier proteins help molecules to pass to the other side of the membrane the electrochemical gradient.Explanation:
Diffusion: Refers to the pass of some small polar hydrophilic molecules through the lipidic bilayer. There are momentary membrane openings that allow small molecules to freely move from one side to the other in favor of the electrochemical gradient. These openings are the result of the lipids movements. The membrane permeability depends on the size of the molecule. The bigger the molecule is, the less capacity to cross the membrane it has. Diffusion is a very slow process, and to be efficient requires short distances and pronounced concentration gradients.
Facilitated diffusion: Occurs when big hydrophilic molecules cannot move freely across the membrane. In these situations, channel proteins are in charge of passive transport. Facilitated diffusion also occurs in favor of electrochemical gradients, meaning that molecules move from the more concentrated side to the less concentrated side.
Simple diffusion and facilitated diffusion are passive transport processes because the cell does not need any energy to make it happen.
Active transport is against the electrochemical gradient, so it does need energy to happen. Molecules move from a lower concentration side to a higher concentration side. This process is always in charge of carrier proteins. In primary active transport, the energy needed comes from the ATP molecule. In secondary active transport, the energy comes from the membrane electric potential.
Transmembrane proteins act in active and passive transport, connecting cells, and participating in signal transduction.
Channel proteins act by passive transport (these proteins do not need energy to carry in or out substances. They do it according to an electrochemical gradient) and carrier proteins act during active transport (these proteins do need the energy to transport substances because they do it against an electrochemical gradient). These transmembrane proteins carry in those substances needed by the cells to properly perform their activities, and they can also carry out waste substances.
An example of two organisms living
together is...
A. a bird gliding on wind currents.
B. a flower opening in the morning.
C. a dandelion growing in your lawn.
Answer:
c
i think
Explanation:
What cellular structure is responsible for the movement that occurs in image 3?
IMAGE ABOVE
O cytoplasm
O nuclear membrane
chromosomes
spindle fibers
Answer:
Spindle fibers because they split the cell
Explanation:
Pls help I willl give Brainly
Answer:
C
Explanation:
Answer:
I believe the answer is Z= cerebrum used for thinking, memory and processing sensory information
Explanation:
hope this helps xx
Which is generally true of all terrestrial biomes?
Answer: they're based on land
Explanation:
Wheat has flowers similar to those in Fig. 5.1, but reproduces by self-pollination. Explain the consequences of self-pollination for a population of plants.
Answer:
The transfer of mature pollen grain from anther of the flower to the stigma of the same flower of the same [species is called self pollination.
Generally, the transfer of pollen grains by wind,animals,and water to stigmas is called pollination. It is a means of vegetative propagation which ensures reproduction.
Therefore during self pollination, the same genes are distributed from one generation to another. Thus genetic purity is ensured. It also ensured reproductive success. because there is little chance of the pollen grain getting lost in transit. It is also certain a particular plant would always breed true.
Additionally it prevent the process of transfer of genes in some transgenic crops( rice, maize) where through genetic engineering some genes are introduced in their genome.
The only negative effect is lack of genetic diversity. Therefore after a period of time the plants get weak and prone to diseases and infection. Because of poor resistant from lack of variation.
Explanation:
The allele for a widow's peak has complete dominance over the allele for a straight hairline (w). What is the probability of two parents heterogeneous for a widow's peak (Ww) having an offspring without a widow's peak?
Your skin cells and muscle cells have different characteristics. Finish this statement: The proteins in your skin cells and muscle cells are
a
the same
b
different
Answer:b
different
Explanation:
This core has stayed hot over the billions of years since. Every kilometer you go down, it gets about 25 degrees Celsius hotter (or 1 degree Fahrenheit per 70 feet). The core will never freez
over. Scientists estimate it would take about 91 billion years for the core to completely solidify. The sun will burn out long before that time!
Which two words would BEST replace estimate" and "solidity in the paragraph above?
(A) guess; freeze
(B) hope; set
(C) predict: harden
(D) assume, congeal
Answer:
C. Predict; Harden
Three stages of development from an embryo from a fish salamander turtle and chicken . What information about evolutionary relationships can be inherited from the drawings
Answer:
Zygote, cleavage and hatching are embryogenic stages of fish, salamander, turtle and chicken.
Explanation:
The main embryogenic development stages of fish, salamander, turtle and chicken were zygote, cleavage and hatching. all these stages are present in these organisms which shows that fish, salamander, turtle and chicken are evolved from a single ancestor. Due to similar embryogenic development stages indicates close evolutionary relationships among these organisms.
ASAP I WILL MARK BRAINLIST
What is the product of translation?
A. A strand of RNA
B.A nucleic acid chain
C.A strand of DNA
D.An amino acid chain
The twisted ladder shape of DNA
A.
triple helix
B.
helical ring
C.
double helix
D.
hexagonal ring
Answer:
C. Double helix
Explanation:
The twisted ladder shape that DNA has can also be called a double helix.
It is in the shape of a helix, which is similar to a 3D spiral shape.
It is called a double helix because DNA is made up of two DNA helix strands that are intertwined.
So, C is the correct answer.
Answer:
The answer is C. double helix.
Explanation:
DNA is constructed through two threads or strands winded around each other in the shape of a twisted ladder - hence one of the shape of a DNA's most prominent nicknames (that is, twisted ladder). Additionally, it is even more commonly known as a double helix. In fact, the term double helix was especially created to describe DNA!
What is the probability of producing a roan (red and white) cow when a white cow is crossed with a red cow?
Cross: RR x WW
Answer:
A cross between a roan bull (Ww) and a white cow (ww) produces roan and white phenotypes in a 1:1 ratio.
Explanation:
Two alleles are influencing the color of the hair of the cow-W red and w white.
These alleles show that a hybrid Ww has red hair. The genotype of the bull is Ww, WW is red and ww is white. So, mixing the red and white cows is 1:1.
Which of the following is not a function of the cell membrane?
Answer:
The plasma membrane, or the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions. One is to transport nutrients into the cell and also to transport toxic substances out of the cell.
Explanation:
This is what the cell membrane does so if any of these are an answer choice then use process of elimination to figure out which one is correct
Answer:
its does not provide energy
Explanation:
An ecosystem usually contains a single kind of habitat.
True or false
what is the role of dna in determining an
organisms trait
What is the role of mRNA during translation?
A. forms parts of ribosomes
B. carries codes from the DNA in the nucleus to the site of protein synthesis
C. Carries amino acids to the mRNA for correct placement into the protein chain
Answer:
I think it is C if I am wrong i am srry
When a drop of food dye is placed in a flask of water, the dye molecules spread slowly through the entire volume of the water until they are evenly distributed. Name this type of transport.
a. diffusion
b. osmosis
c. molecular pumps
d. facilitated diffusion
In 1-3 sentences, explain the structure and function of an enzyme.
Answer: Enzymes are life’s great facilitators. They create the conditions needed for biochemical reactions to happen fast. The general name that chemists use for chemical entity that increases the speed of a reaction is “catalyst.” Enzymes are biological catalysts they catalyze the chemical reactions that is happen inside living things.
Explanation:
Explain digestion Process.
Answer:
Each bite passes through several "cells" within the digestive system, and each of them has a specific function in terms of processing uneaten food.
Explanation:
The food begins to be processed in the mouth and prepared for the upcoming digestion process.
Saliva is important for food processing, among other things because it contains the enzyme ptyalin (alpha-amylase), which is responsible for the breakdown of starch and glycogen and continues its activities in the stomach.
Well-chewed food passes through the pharynx to the esophagus. During the swallowing of food, the opening of the trachea is closed, although it is possible that some crumb of food strays and causes a strong cough, which expels the excess from the trachea.
From the esophagus, food comes into the stomach, which is surrounded by ribs. Stomach acid is extremely strong and enables the conversion of food into liquid, which facilitates the further process of digestion.
Food from the stomach continues its way through the digestive tract to the duodenum, from the duodenum it reaches the small intestine.
Food processing in the large intestine is the last phase of digestion of food in the digestive tract. When the waste materials reach it, they need up to 24 hours to pass through the large intestine and reach the other end.
What is the main function of the immune system?
A.to package wastes and remove them from the body b. To fight diseases and other invaders C. To take the food we eat and turn it into nutrients for the body to use d. To send electric through the body
Answer:
c
Explanation:
explains why energy is needed for active transport?
Answer: Active transport requires energy to move substances across a plasma membrane, often because the substances are moving from an area of lower concentration to an area of higher concentration or because of their large size.
Explanation: Learned About it in class please give me brainliest
who come first egg or hen ?
DUE IN 1 HOUR HELP! Please answer
Compare the carrying power of a small, mountain stream in the mountains with that of a slow large river that is about to enter the sea.
(Note: Needs to be detailed) [this is more of a Geology question]
Answer:
The carrying power of a small, mountain stream in the mountains with that of a slow large river that is about to enter the sea is explained below in details.
Explanation:
A mountain stream is a river or stream, normally with a sheer slope, running down a mountainside. Stream velocity is most noted in midstream near the exterior and is crawling along the stream bottom and shores due to friction.
The river stalls down at the entrance, so it doesn't have the energy to carry all the sand, dirt, and clay anymore. These deposits create the flat, regularly triangle-shaped tract of a delta.
plz help will give brainliest
Answer:
Explanation:
Tropical Zone: humid, hot, wet, rainforests
Temperate Zone: forests and grasslands, four seasons
Cold Zone: windy and snowy, mountains and highlands
How many grams are in 12 teaspoon of salt if 5.00 grams of salt are in 1.00
teaspoon?
Answer:
There are 60 grams of the salt in 12 teaspoon of it
Explanation:
We can rephrase the question by saying, if 1 teaspoon has 5.00 grams of salt, how many grams does 12 teaspoon have? We can then equate the answer by doing the following
1 teaspoon = 5 grams
12 teaspoon = ?
Cross-multiply
? = 12 × 5/1
? = 60 grams
There are 60 grams of the salt in 12 teaspoon of it
The mRNA molecule contains the codon
that is read during translation. What
molecule contains the anticodon that is
complementary to this codon?
A. nucleosomes
B. amino acids
C. TRNA
Answer:
it is TRNA
Explanation:
HOPE U ENJOY ANSWER
What is the most specific group to which both camels and platypuses belong?
Answer:
Mammals
Explanation:
Camels and platypuses both exhibit distinct mammalian features such as being warm blooded and having fur
How is sexual reproduction (meiosis) involved in cystic fibrosis? How is asexual reproduction (mitosis) involved in cystic fibrosis?
Meiosis is the cell division that enables sexual reproduction. It consists of two successive cell divisions, after which four genetically different cells are obtained, which contain half the number of chromosomes as the mother.
Marine biotechnology can be used to produce genetically modified (GM) fish with preferred traits. Some opponents of genetic modification argue that the release of these fish can have a negative impact on natural ecosystems. Is this a valid concern, and can anything be done to minimize the impact on nature
Incomplete question. The options;
a) yes, gm fish could alter biodiversity if they mate with fish in the wild. This impact is best minimized by producing gm fish that are sterile.
b) yes, gm fish can alter biodiversity if they mate with fish in the wild. This impact is best minimized by tracking the released fish and capturing them.
c) no, gm fish cannot impact natural ecosystems because they are likely to die in the wild. There is no need to be concerned about the impact to nature.
d) no, gm fish cannot impact natural ecosystems because they are designed.
e) there is no need to be concerned about the impact to nature.
Answer:
a) yes, gm fish could alter biodiversity if they mate with fish in the wild. This impact is best minimized by producing gm fish that are sterile.
Explanation:
Indeed, genetically modified (GM) fish basically refers to fish whose natural traits have been edited or adjusted by scientists. For example, they may be modified in such a way that they feed more and grow faster than is usual for wild fish. Biodiversity is altered when these GM fish begin to consume more food and also producing offsprings with similar traits, over time this would make it difficult for natural wild fishes to find food; reducing their population, thereby impacting nature.
However, if GM fish are produced to be sterile (ie cannot reproduce offsprings), it could easily lead to a balance in the population of the natural ecosystem.
A student is collecting the gas released from a plant when exposed to sunlight. The gas being collected is:
A) water
B) Carbón dioxide
C) ATP
D) oxygen
Answer:
D
Explanation:
Plants absorb carbon dioxide and releases oxygen, that is part of the reason trees are important to the earth because one, many animals live in forests, and two, they give oxygen to the earth.