A substance with a pH of 6 is called O a base. O neither an acid nor a base. O an acid. O both an acid and a base.
4
The cell membrane controls the rate at which molecules, such as water and oxygen,
enter the cell to maintain homeostasis. This rate is determined by the -
F permeability of the cell membrane
G mass of the nucleus
H stage of the cell cycle
J primary function of the cell
5
Some solutes move freely across cell membranes, while other solutes require
assistance from special gates. Passive transport and active transport are methods of
moving solutes across cell membranes.
Which of the following accurately describes the difference between passive transport
and active transport?
A Passive transport can move molecules both in and out of a cell, but active transport
cannot.
B Passive transport works against a concentration gradient, but active transport does
not.
C Passive transport does not require energy, but active transport does.
D Passive transport requires carrier proteins, but active transport does not.
Answer:
the first one is F, the permeability. the second is C
Question 4: The permeability of the cell membrane determines the rate at which molecules enter a cell.
Question 5: The statement that describes the difference between passive and active transport is "Passive transport does not require energy, but active transport does"
CELL MEMBRANE:
The cell membrane is the organelle that bounds the cell and its component.The cell membrane is referred to as a semipermeable membrane because it selectively allows the passage of molecules in and out of the cell. However, the rate at which molecules enter a cell is determined by the permeability of the cell membrane. The cell membrane is permeable to some molecules but not permeable to others.CELLULAR TRANSPORT:
The transport of substances in and out a cell can be of two types namely: active transport and passive transport. Active transport is the type of transport that involves the use of energy in form of ATP. In active transport, substance move against a concentration gradient. On the other hand, passive transport does not require energy input because movement of substances occur down a gradient. Therefore, the statement that describes the difference between passive and active transport is "Passive transport does not require energy, but active transport does".Learn more at: https://brainly.com/question/18067330?referrer=searchResults
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What are cells that make up testis (imma need like. At least 2 sentences- 3 sentences pls)
Answer:
Seminiferous,Rete testis, Efferent ducts
Explanation:
Seminiferous tubules are coiled tubes that make up most of each testis. The cells and tissues in the tubules are responsible for spermatogenesis, which is the process of creating sperm.
After sperm is created in the seminiferous tubules, sperm cells travel toward the epididymis through the rete testis. The rete testis helps to mix sperm cells around in the fluid secreted by Sertoli cells. The body reabsorbs this fluid as sperm cells travel from the seminiferous tubules to the epididymis.
The efferent ducts are a series of tubes that join the rete testis to the epididymis. The epididymis stores sperm cells until they’re mature and ready for ejaculation.
After the body has begun shivering, what explains why it would stop shivering?
A. When body temperature returns to normal, the respiratory system sends a message to the skeletal system to stop shaking.
B. When body temperature returns to normal, the nervous system sends a message to the muscular system to stop shaking.
C. While body temperature is below normal, the nervous system sends a message to the skeletal system to stop shaking.
D. While body temperature is below normal, the respiratory system sends a message to the muscular system to stop shaking.
Answer:
B
Explanation:
your nervous system tell your muscles to stop shaking no, there not actually shaking there lossening a tightening
Answer:
B.)
Explanation:
During the first step of cellular respiration, glucose is converted into
Answer:
The first stage of cellular respiration, called glycolysis, takes place in the cytoplasm. In this step, enzymes split a molecule of glucose into two molecules of pyruvate, which releases energy that is transferred to ATP.
Explanation:
Answer:
glucose are first converted into pyruvate or enter the pathway at later intermediates such as oxaloacetate and dihydroxyacetone phosphate
Explanation:
In a cross between two mice that are heterozygous for agouti, black, color, and piebaldism, what is the probability that offspring will have solid black fur along with large patches of white fur? (Hint: Consider each gene separately; then use the multiplication rule. For more help getting started, see Hint 1.)
Answer:
9/256
Explanation:
According to Mendel's experiments the results for the heterozygous are in the ratio 3:1
As each gene is considered separately and the multiplication rule is used. Therefore the probability of getting a solid color would be 1/4 and black fur would be 3/4. Similarly the probability of getting the colored fur is 3/4 and getting a piebald( white patches) is 1/4
Then the combined probability is (1/4*3/4*1/4*3/4)= 9/256
Where does energy and matter come from
Answer:
energy comes from nutrition from our food. Matter comes from hydrogen
Explanation:
True or False?
1. Carbon is a nutrient needed by both plants and animals for growth.
T or[F?
2. Nutrients do not cycle through an ecosystem.
T or F?
3. Carbon can be found in the atmosphere (layer of gases surrounding a planet).
T or F?
4. Carbon can be found in the earth's crust.
T or F?
5. Carbon cannot be found in earth's oceans.
T or F?
define biodiversity in your own words
Explain why scientists use shared
characteristics to make cladograms.
Answer:
Scientist use synapomophies, or shared derived characters, to define cladograms. For instance, mammary glands are a shared characteristic of mammals. All mammals and their oldest common ancestor, had or have mammary glands.Thus, if we are looking at an unidentified animal and trying to place it in a cladogram, if it has mammary glands we know it belongs in that branch. Cladogram is a diagram used to represent a hypothetical relationship between groups of animals, called a phylogeny. A cladogram is used by a scientist studying phylogenetic systematics to visualize the groups of organisms being compared, how they are related, and their most common ancestors.
Explanation:
Answer:
Sample Response: Shared characteristics are features or qualities that organisms have in common with each other. They are used to make cladograms because they show the relationships among organisms. They can also show which organisms have a common ancestor.
Explanation:
When looking across the periodic table from left to right, which of these groups are the first to contain nonmetals?
group 2
group 7
group 14
group 18
Which habitat is best for salmonberry growth? And why
A. Forest
B. Stream bank
C. Forest edge
Answer:
I think stream bank. It grows in moist places and wetlands, and is especially abundant along streamsides and riparian areas at elevations below 1400 m.
Explanation:
What are 3 lab safety practices you will have to follow as you work to cure lactose intolerance
Different lab safety rules should be followed, you should follow the written and verbal instructions, always try to do under direct supervision, never work alone in the laboratory.
What are the lab safety rules ?For lab safety rules we should be aware of hazardous materials, should be well trained before using any lab equipment, maintain the concentration to avoid either spillage of toxic chemicals.
All chemicals should be labelled and stored properly, do not mix up all the chemicals, Emergency plan should be placed, sensible clothes should be wear along with glasses, gloves and footwear.
Loose clothing do not get caught in a flame or chemicals, so it should be used, do not taste or smell chemicals, never pour old stock chemicals , Chemical Hygiene Plan (CHP) should be used which will addresses the specific hazards.
Do not follow un-tested and unauthorized experimental procedure, Never undertake unknown experimentation and clean up all the chemical spill.
For more details regarding lab safety rules, here
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whats the form of Stereoisomerism?
Answer:
In stereochemistry, stereoisomerism, or spatial isomerism, is a form of isomerism in which molecules have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space. This contrasts with structural isomers, which share the same molecular formula, but the bond connections or their order differs. By definition, molecules that are stereoisomers of each other represent the same structural isomer.
Explanation:
Explain how so many types of cells can be formed even though all the cells have the same DNA.
Because all of your cells in your body started off as single cells. That single cell then divided into multiple other cells. So it breaks down so it can help the entire body equally. In order for a cell to work 1,000 of these proteins need to be created.
Inside of the cell, energy conversions must take place in order to remove energy from raw materials and turn it into a more useable from. What organelle performs these energy
conversions in all eukaryotic cells?
Answer:
mitochondria is responsible for this conversions
Why can Some insects can stand on the surface of water because water
Answer:
surface tension
Explanation:
The cross over frequency between linked genes C and D is 40%; between A and D is 35%; between C and A is 5%; between A and E is 25%; and between E and D is 10%. Construct a linkage map of these 4 gense and show the distances between the adjacent genes.
Answer: The first line shows the Correct order of genes in the chromosome and the second and third lines show the distances between genes.
C ------------ A ---------------------------------- E -------------------- D (Correct order)
/-----5MU--//---------------25 MU-----------//---------10MU-----/ (Distances)
/------------------------------------40 MU ------------------------------/ (Total distance)
Explanation:
We need to know that 1% of recombination frequency = 1 map unit = 1cm. And that the maximum recombination frequency is always 50%.
The map unit is the distance between the pair of genes for which every 100 meiotic products, one results in a recombinant one.
The recombination frequencies between two genes determine their distance in the chromosome, measured in map units. So, if we know the recombination frequencies, we can calculate distances between the four genes in the problem and we can figure the genes order out. This is:
Recombination frequencies:
1% of recombination frequency = 1 map unit (MU)
C-D = 40% = 40 MU
A-D = 35% = 35 MU
C-A = 5% = 5 MU
A-E = 25% = 25 MU
E-D = 10% = 10 MU
Now that we know the distances between pairs of genes, we need to figure out which is the correct order in the chromosome.
C and D are the genes with the biggest distance between them (40MU), which probably means they are in the extremes. The rest of the genes are in the middle.
C ------------------ (40MU) --------------------------------------- D
A is 5 MU apart from C and 35 MU apart from D, which means it is closer to C.
C------ (5MU)----A------------------------------(35 MU)-------D
E is 25 MU apart from A and only 10 MU apart from D, which means it is between A and D, and closer to D
C--------------------A------- (25 MU)---------E----(10MU)-----D
The sum of C-A distance + A-E distance + E-D distance equals the C-D distance. This is:
C-A 5MU + A-E 25MU + E-D 10MU = C-D 40 MU
5 + 25 + 10 = 40
In conclusion, the correct order of the genes in the chromosome is
C ------------ A ---------------------------------- E -------------------- D
/-----5MU--//---------------25 MU-----------//---------10MU-----/
/------------------------------------40 MU ------------------------------/
Which phrase best describes of a convergent boundary?
A. plates that move toward each other
B. plates that are attracted to each other by gravity
C. plates that move away from each other
D. plates that move side by side past each other
Answer:
option A is correct
Explanation:
Answer:
A. Plates that move toward each other
Explanation:
This the correct answer.
what are the products in cellular respiration
Answer:
In cellular respiration, glucose and oxygen react to form ATP. Water and carbon dioxide are released as byproducts. The three stages of aerobic cellular respiration are glycolysis (an anaerobic process), the Krebs cycle, and oxidative phosphorylation.
what connects bones to bones?
Answer:
Ligaments connect your bone to bone
What is a warm front?
Answer:
the boundary of an amount of mass in warm air
Answer:
A warm front is a type of front where a warm air mass overtakes a cold air mass.
Glaciers only form in
A. in water
B. in valleys
C. where more snow falls than melts
D. where more snow melts than falls
Answer:
I think the answer for this is D
Answer: where more snow falls than melts.
Explanation:
just took the quiz
The digestive system and the excretory system both excrete waste. Which best describes how waste is secreted in each system?
A. The digestive system excretes a liquid waste and the excretory system excretes a solid waste.
B. Both systems excrete waste as a liquid.
C. Both systems excrete waste as a solid.
D. The digestive system excretes a solid waste and the excretory system excretes a liquid waste.
Answer:
D
Explanation:
Which picture shows Osmosis? (A,B,C or D?)
Answer:
c
Explanation:
Answer:
Osmosis is the spontaneous net movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides. The answer is b
Explanation:
Which organelle in a prokaryotic cell contains genetic information?
nucleoid
flagellum
capsule
ribosomes
Answer:
The nucleoid.
Explanation:
Answer:
Nucleoid
Explanation:
Prokaryotic cells are simple cells that lacks a definite nucleus and some membrane bound organelles. Prokaryotic cells have a nucleoid region, which is an irregularly-shaped central region of the cell that contains the cell’s genetic information (DNA). Other organelles that can be found in prokaryotic cells include plasma membrane, cell wall, cytoplasm and ribosomes.
Plants use sunlight, carbon dioxide from the air, and water from the soil to make their food matter.
True
False
Answer:
•The answer is True
•
•
•
population of birds lives on a small island. Another population of the same species lives on the mainland. The distance between the island and the mainland is too great for birds to fly back and forth. Recently, a series of sandbars and tiny islands have formed between the island and the mainland.
Answer:
whats the question fam Explanation:
bruh moment
Answer:
an increase in gene flow between the bird populations
Explanation:
i just know
Which of the following statements is true?
A. Outdoor exercise is always strenuous.
B. Outdoor exercise helps your body make vitamin D.
C. You can't get outdoor exercise in a city.
D. Outdoor sports take place only in the wilderness.
Box A =
B
A
с
D
E
G
H
F
Answer
bad
Explanation:
