Answer:
c. A high natural birth rate
Which animal adaptation happened before the others?
A. Reproduction on land
B. Lungs
C. Backbone and skull
D. Development of a coelom
Answer: D. development of a coelom
Answer:
D?
Explanation:
In the simulation, when protein molecules were evenly distributed on both sides of the membrane, was the solution isotonic, hypertonic, or hypotonic? Which direction was water flowing?
Answer:
1. Diffusion is the process of a substance moving from an area of high concentration to an area of lower concentration. Osmosis is a type of diffusion where water moves across a semipermeable membrane still from an area of high concentration of water to an area of lower concentration of water. This corresponds to water moving from an area with a low concentration of solute to an area with a higher concentration of solute.
2.
a. A semipermeable membrane allows some substances to pass through it.
b. The plasma membrane of a cell allows small uncharged molecules to pass through it, but not large molecules and not charged ions.
3.
a. The protein molecules were evenly distributed on both sides of the membrane, so this solution was isotonic.
b. In an isotonic solution, water moves both in and out of the cell, which was observed in the simulation.
4.
a. The protein molecules were more highly concentrated on the inside of the cell, so this solution was hypotonic.
b. In hypotonic solutions, water moves into the cell to help dissolve the higher amount of solute inside the cell, which was observed in the simulation.
5.
a. A semipermeable cell membrane is important to allow some molecules, like proteins, to be more highly concentrated inside the cell than outside the cell. If the cell membrane were permeable, the molecules on the inside of the cell would exit the cell and be evenly distributed in the cell and in its environment.
b. If the cell membrane were not permeable at all, the cell would not be able to receive nutrients from its environment.
Explanation:
When protein molecules were evenly distributed on both sides of the membrane, the solution is isotonic.
In isotonic solution the concentration of solutes on side remain same .There is no net gain or less of water in isotonic solution.What will be the direction of water flow in isotonic solution?The water will flow freely across the cell membrane without any change in the concentration of solutes.In isotonic solution the cell neither shrink nor swell because the water concentration will remain same.To know more about isotonic solution here
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what directs the changes that occur in allele frequency
a. natural selection
b. random mutations
c. hox genes
Answer:
I think it's b - random mutations... >3
A change in allele frequency is directed by natural selection. So the correct answer is option A.
What is meant by allele frequency?The allele frequency (also known as gene frequency) refers to the frequency at which a particular allele appears in a population. The term evolution in population genetics refers to a variation in the frequency of a particular allele within a population. The frequency ranges from 0 (zero alleles present in no individuals) to 1 (all alleles present in all individuals). The gene pool refers to the sum of all alleles at all the genes in a population.
Natural selection affects the phenotype, or observable characteristics, of an organism. Phenotype is usually largely determined by genotype (the number of alleles, or versions of genes, that an organism carries).
When the phenotype produced by specific alleles helps an organism survive and multiply better than its neighbors, natural selection can spread the beneficial alleles from generation to generation – in other words, it causes microevolution.
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Can someone help me if this is correct
Answer:
I think B because when you digest you release waste, you absorb nuitreunts from it, and you make proteins for energy.
Census data show that the human population doubled from 2.65 billion in 1953 to 5.3 billion in 1990. If it continues to double at this rate, the human population could reach 10 billion by the year 2020. Which best explains how this rate of human growth can harm the environment on which humans depend?
The question is incomplete, the complete question is;
Census data show that the human population
doubled from 2.65 billion in 1953 to 5.3 billion
in 1990. If it continues to double at this rate,
the human population could reach 10 billion
by the year 2020. Which BEST explains how
this rate of human growth can harm the
environment on which humans depend?
A. by gradually making up more available energy
B. by using resources faster than they can be
replaced
C. by changing how matter cycles through an
ecosystem
D. by increasing the variety of ecosystems that are
Answer:
by using resources faster than they can be
replaced
Explanation:
As population of the world continues to grow, there is greater demands for resources which are obtained from the environment such as crude oil for energy, solid minerals for various applications, wood for furniture etc.
Demand for these materials increase exponentially as population increases thus they are extracted at a faster rate than nature can replace them. This will eventually harm the environment on which humans depend as population increases.
The variable h represents the number of hours spent doing yard work and the variable d represents the amount of money earned how many hours spent doing yard work and the variable d represents the amount of money earned how many hours in all will it take Whitney to earn 15$
Answer:
[tex]4\frac{1}{11}[/tex] hours
Explanation:
Given
See attachment for graph
First, we determine the equation of the graph.
Pick any two points from the graph
[tex](h_1,d_1) =(18,168)[/tex]
[tex](h_2,d_2) =(36,366)[/tex]
Calculate the slope (m)
[tex]m = \frac{d_2 - d_1}{h_2 -h_1}[/tex]
This gives:
[tex]m = \frac{366 - 168}{36 -18}[/tex]
[tex]m = \frac{198}{18}[/tex]
[tex]m = 11[/tex]
The equation is then calculated as:
[tex]d = m(h - h_1) + d_1[/tex]
This gives:
[tex]d = 11(h - 18) + 168[/tex]
Open bracket
[tex]d = 11h - 198 + 168[/tex]
[tex]d = 11h-30[/tex]
So, the number of hours to earn $15 is:
[tex]d = 11h-30[/tex]
[tex]15 = 11h -30[/tex]
Collect like terms
[tex]11h = 15 + 30[/tex]
[tex]11h = 45[/tex]
Solve for h
[tex]h = \frac{45}{11}[/tex]
[tex]h = 4\frac{1}{11}[/tex]
The intense heat from Earth's interior is called _____________________ energy.
Answer:
it's called geothermal energy
How does being hydrophobic affect protein folding?
Answer:
The hydrophobic effect is considered to be the major driving force for the folding of globular proteins. It results in the burial of the hydrophobic residues in the core of the protein. It is exemplified by the fact that oil and water do not mix and was described well by G. S. Hartley in 1936 .
PLEASE I NEED HELP Question 8 of 10
Membrane proteins called pumps use energy to move hydrogen ions to one
side of the membrane. Which term describes the difference between the
numbers of hydrogen ions on opposite sides of the membrane?
A. lon concentration
B. Concentration gradient
C. Homeostasis
D. Equilibrium
Answer:
Explanation:
Pumps, also called transporters, are transmembrane proteins that actively move ions and/or solutes against a concentration or electrochemical gradient across biological membranes. Pumps generate a membrane potential by creating an electrochemical gradient across the membrane.
please answer this for me
Answer:
The answer is a tape worm they are long and flat and can have more than one inside a animal, fish, human, and more
The white fur of a polar bear is an example of a:
A. Structural adaptation
B. Behavioral adaptation
C. Functional or physiological adaptation
Answer:
the answer is A
The bears fur is white to help it blend in and keep warm. suitable for the environment it lives in
Answer:
A. Structural adaptation
Explanation:
The white fur of a polar bear is an example of a: Structural adaptation
Pls fast
cancer drug Vinblastine interferes with the
synthesis of microtubules. Which process does
Vinblastine interfere with during the cell mitosis?
Answer:
The correct answer is - disrupting microtubule assembly and proper formation of the mitotic spindle and the kinetochore.
Explanation:
Vinblastine is known for treating cancer cells by sending them to apoptosis. It interferes with the synthesis of microtubules. It binds to the microtubular proteins of the mitotic spindle that causes disrupting microtubule assembly.
It also prevents from proper formation of the mitotic spindle and the kinetochore which is essential to separating chromosomes during anaphase. They arrest mitosis and cause cell death.
PLEASE HELP PLSSS I need just answer fast
Answer:
A
Explanation:
BECAUSE IT HAPPENS DURING MENSTRUAL CYCLE
Answer:
The sudden increase in lh hormone
Explanation:
In women, ovulation of mature follicles on the ovary is induced by a large burst of LH secretion - the preovulatory LH surge.
Definition of Salt Water
(Impact on Weather)
The thickness of seawater is an element of saltiness and temperature, Lagerloef clarified. Saltier water is heavier and will sink further in the sea, where it joins flows that course water all throughout the planet. ... Stable salt densities in the seas keep the world's environment in balance, researchers accept.
hope this helps:)
Answer:
Salt weathering or Salt Weather is a form of mechanical or physical weathering of rock. ... The salt derives from an external source (capillary rising ground water, eolian origin, sea water along rocky coasts, atmospheric pollution). Salt weathering is favoured by dry conditions, such as are found in warm and cold (arctic) arid climates.
Explanation:
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#5 help will markbrainliest
Answer:
after nutrients are absorbed during digestion,the excretory system removes faeces through the rectum. these work together to maintain oxygen homeostasis.
The products of photosynthesis (glucose and oxygen) are used in cellular respiration. The products of cellular respiration (water, and carbon dioxide ) are used in photosynthesis.
A. True
B. False
Answer:
True
Explanation:
This is true because the cycle goes to Oxygen Glucose then Cellular Respiration to Carbon Dioxide Water then to photosynthesis. This cycle is like this because Photosynthesis converts carbon dioxide and water into oxygen and glucose. All in a cycle :)
Answer:
A. True
Explanation:
Yes, the products of photosynthesis are used in cellular respiration. The products of cellular respiration are used in photosynthesis.
In a predator prey graph, the peak for the predator population always comes after the peak for the prey
population. Why do you think this happens?
60 predator prey grap populationin the peak.
How many amino acids must be obtained in the diet because they cannot be made by the body? A. 2 B.5 C.10 D.20
Answer: C
Explanation: Just is.
When cells join together, what is formed?
A. Tissue
B. Organs
Answer:
A. Tissue
Explanation:
The cells join together to form tissues. So, option (A) is the correct answer.
Answer:
A. Tissue
Explanation:
Just as cells join together to form tissues
What subatomic particles make up the nucleus of an atom? Check all that apply.
neutrons
electrons
protons
subatomic particles are not found in the nucleus
Answer:
• neutrons
• protons
Explanation:
The nucleus is made up of two types of subatomic particles, that is the protons and neutrons.
Answer:
neutrons and protons
Explanation:
8. Which type of fossil shows evidence of evolution?
O imprint fossils
O trace fossils
O transitional fossils
O mold fossils
Use the codon chart to determine the amino acid that the following mRNA sequence would code for.
mRNA sequence: AUG
Answer:
aug = met, which stands for methionine
Answer:
AUG is the start of the codon
Explanation:
please help me i need to pass
Answer:
Read the question and try understanding it
Explanation:
do you think there is an aesthetic value that could be attached to the hides of the nguni cattle after slaughtering ?
Answer:
The correct answer is - yes, these hides are used as aesthetic value.
Explanation:
Nguni hides are the secondary products after slaughtering the Nguni cattle farmed in South Africa. These skins or hides are used to make many aesthetic values and beauty items such as floor rugs. These hides are not only famous for their natural beauty but also due to their incredibly hard-wearing and very easy to clean.
Other than Floor rugs these are also used as furniture in rich houses and lodges. These hides are used to make shoes, leather jackets, car leather, and many more.
A biological process is represented in the diagram below. Which of the following concepts does the diagram best illustrate
Answer:
in sexual reproduction the offering we see the same number of chromosome from each parent
Compare the movement of oxygen and carbon dioxide across the cell membrane
"As oxygen-rich (and carbon dioxide-poor) blood travels by a cell the oxygen diffuses through the cell membrane to the area of lower concentration inside the cell. ... Because the CO2 is of a higher concentration in the cell than in the blood passing by, this gas continually diffuses out of the cell."
4. The human population has experienced unchecked growth for the past 200 years. What does "unchecked" mean? A. Slow b. At a steady rate c. Unrestrained d. Dangerous
Answer:
B
Explanation:
The correct option would be B
The human population experiencing unchecked growth for the past 200 years does not mean that there were no restraining factors that limit the population. Factors such as death, competition for resources, diseases, etc., were still present.
Despite the limiting factors, the population has been growing. Hence, the correct word to replace 'unchecked growth' would be 'at a steady rate'.
Slow and dangerous really have nothing synonymous with unchecked growth.
The correct option is, therefore, B.
Select the correct answer from each drop-down menu.
The pancreas is an accessory organ whose function aids the chemical digestion of food.
If the pancreas fails to make
, it will inhibit the action of enzymes and affect chemical digestion. Also, might damage the small intestine walls.
Answer:
I dont know the first one but the last one is acidic chyme. Hydrochloride is what I put as the first and its wrong, acidic chyme is right as the second one.
Explanation:
Answer:
First one: Bicarbonate Ions
Second one: Acidic Chyme
Explanation:
...
Write the procedure of stone grafting.
Answer:
Stone/epicotyl grafting is a simple, cheap and quick method of mango propagation with a success rate of 75-80%. For this purpose, stones should be sown in June-July on raised beds of size 1x3 m. the beds should e prepared by mixing soil and FYM in the proportion of 2:1.
Explanation:
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