Which of the following must be true for natural selection to occur?
O A. The ecosystem cannot contain predators.
B. A population cannot have competition for resources,
C. A population must be stable.
D. The ecosystem must have limited resources,

Answers

Answer 1
D. The ecosystem must have limited resources

Related Questions

This table shows the codons found in messenger RNA (attached). Using this information, what sequence of nucleotides in the template strand of DNA could code for the polypeptide sequence Val-His-Thr?

A. GUA-CAU-ACC (THIS IS WRONG)

B. GTA-CAT-ACC

C. CAT-GTA-TGG

D. CAU-GUA-UGG


Please explain, I'm very confused about this topic and I want to learn about it. No false answers or you will immediately be reported. Thanks in advance!

Answers

Answer:

A

Explanation:

The correct answer would be option A - GUA-CAU-ACC

Looking at the table of codons, for the amino acid Val, the first base (which is on the 1st column in the 6th row) is G while the second base (2nd column, 2nd row) is U. The third column can be any of U, C, A, or G (6th column, 4th row). Hence, GUA is plausible

For the amino acid His, the first base is C (1st column, 2nd row), the second is A (4th column, 4th row) while the last could be any of the 4 bases. Hence, CAU is plausible.

For the amino acid Thr, the first base is A (first column, 5th row), the second is C (3rd column, 2nd row) while the 3rth could be any of the 4 nucleotide bases. Hence, ACC is plausible.

Therefore, the correct sequence of nucleotides for Val-His_Thr would be GUA-CAU-ACC

which structure is found in both plants and animal cells

Answers

Answer: Animal cells and plant cells share the common components of a nucleus, cytoplasm, mitochondria and a cell membrane.

Answer:

the nucleus

Explanation:

Balance the equation with the correct coefficients.

Answers

Answer:

2 KClO³ ------ 2KCl + 3O2

Answer:

2KClO3--------2KCl+3O2

Amal was on a picnic to Hatta with his parents and family friends. While playing, he collected some muddy water from the Wadi in his beaker, which he wanted to make pure and clean. A) What do you think will happen to the mud in his beaker if left overnight? B) What is this process called?

Answers

Answer:

See the answers below

Explanation:

A) The mud in Amal's beaker will settle down at the bottom of the muddy water if left overnight with clear water occupying the surface. This is because the particles of mud are insoluble in water and will settle down at the bottom of the muddy water if left undisturbed for a while.

B) The process is called sedimentation. The settled mud particles are referred to as the sediments and the clear water at the top can be decanted off to separate the sediment from the water.

Propuso la teoría catastrofista, según la cual habían sucedido varios episodios de extinción, debidos a grandes cataclismos, seguidos siempre de nuevos periodos de creación

Answers

Answer:

Georges Cuvier.

Explanation:

Georges Cuvier (1769-1832) fue un zoólogo quien propuso que la evolución era el resultado de extinciones producidas por catástrofes a las cuales les sucedían nuevas creaciones con distintas especies. Los ecosistemas con las catástrofes eran destrozados y en los suelos de estos quedaban los  restos de los animales extintos formando parte de los estratos de la tierra.

How many taxa or levels exist in the phylogentic?
a)7
b)4
c)6
d) 8​

Answers

D would be the correct answer I think

n
Which statement best describes the step in muscle contraction when the sarcomere is the shortest?
A The sarcomere is contracted, and the actin and myosin filaments are partially overlapped.
B The sarcomere is relaxed, and the actin and myosin filaments are partially overlapped.
C The sarcomere is contracted, and the actin and myosin filaments are completely overlapped.
D The sarcomere is relaxed, and the actin and myosin filaments are completely overlapped.

Answers

Answer:

C The sarcomere is contracted, and the actin and myosin filaments are completely overlapped.

Explanation:

In rest, the tropomyosin inhibits the attraction strengths between myosin and actin filaments. Contraction initiates when an action potential depolarizes the inner portion of the muscle fiber. Calcium channels activate in the T tubules membrane, releasing calcium into the sarcolemma. At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to troponin C, troponin T alters the tropomyosin position by moving it and unblocking the binding sites. Myosin heads join the uncovered actin-binding points forming cross-bridges, and while doing so, ATP turns into ADP and inorganic phosphate, which is released. Myofilaments slide impulsed by chemical energy collected in myosin heads, producing a power stroke. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament.  Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin. Finally, Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

In the sarcomere, which is the contractile unit of skeletal muscles, there are

Thick myosin myofilaments in the central region belonging to the A band.  Thin filaments united to the Z lines, extending in the interior of the A band until they reach the border of the H band.  Thin actin filaments composing the I band, which belong to two sarcomeres adjacent to a Z line.

When the muscle contracts, the muscular fiber gets shorter and thicker due to the reduction in the length of the sarcomere. The H line and the I band get shorter. The Z lines get closer to the A band, meaning that they get closer to each other. A band keeps constant in length. This change is produced by movement mechanisms that involve a change in the relative position of actin and myosin filaments.

Answer:

C

Explanation:

edge 2021

The picture shows an organ system in the human body.
Kidney
A
Bladder
What is a function of the organ system shown?

Answers

Removes water and salts from the body !

What was Anton van Leeuwenhoek contribution in the development of cell theory

Answers

Answer:

animalcules

Explanation:

that is it i think

Draw a Punnett Square to show Queen Victoria and her husband Albert. Queen Victoria’s genotype will be XX^H and Albert will be XY. X^H indicates the female sex chromosome carrying the gene for hemophilia.

Answers

Explanation:

XY XX^H

XX^H XX^H XY XX^H XX^H

XY XY XY XY XX^H

all the royal families in Europe were related

that must mean 1 family ruled all of europe

The family pedigree of  Queen Victoria shows a number of hemophilic descendants. Because hemophilia is recessive disorder and Queen Victoria was a carrier. X-linked recessive disease most often occurs in males because Males have only one X chromosome.

XY XX^H

XX^H XX^H XY XX^H XX^H

XY XY XY XY XX^H

Which chromosome will cause the disease?

A single recessive gene on that X chromosome will cause the disease. Females have two X chromosomes so they can act as carriers for the disease.

What is hemophilia?

Hemophilia is a bleeding disorder that slows the blood clotting process.Hemophilia is x-linked recessive disorder

So, Queen Victoria was a carrier.

learn more about chromosomes below,

https://brainly.com/question/2600679

#SPJ2

Which type of cell adhesion is useful for anchoring cells together and defending against shear forces on tissues

Answers

Answer:

Desmosomes

Explanation:

Desmosomes are cellular structures that adhere to neighboring cells. Its function is to hold the epithelial cells together, associating the intermediate filament cytoskeletons of neighboring cells, thus forming a transcellular network with high resistance to mechanical traction. It thus allows the cells to maintain their shape and the epithelial sheet to exist in a stable form. Inside cells act as anchoring sites for intermediate rope-shaped filaments, which form a structural network in the cytoplasm providing a certain rigidity. Through these junctions the intermediate filaments of the adjacent cells are indirectly connected forming a continuous network that extends throughout the tissue.

When a cell uses fatty acids for aerobic respiration, it first hydrolyzes fats to Group of answer choices glycerol and fatty acids. glycerol and amino acids. fatty acids and sugars. sugars and glycerol.

Answers

Answer:

glycerol and fatty acids.

Explanation:

Fats as biological molecules can be used as energy sources by the cell when there is low or no carbohydrate (glucose) for use.

Fats, mainly triglycerides enter metabolic pathway in an aerobic condition where they undergo catabolism to produce glycerol and fatty acids, their monomeric units. This process leads to the synthesis of ATP (Adenosine triphosphate). In other words, fats are hydrolyzed to glycerol and fatty acids

Complete the sentence below by selecting the correct words from the drop-down menus. Factors that affect natural selection include , , and .

Answers

Answer:

The correct answer is -

variation, over population and adaption.

Explanation:

Natural selection is the process to which the various species and populations are able to adapt and change according the environmental changes. It is affected by three main factors that are variation, over population and adaption.

Variation: varion is one of the factor that pushes the population to change towards the beneficial variation in the population for their survivability and reproducing theirselves.

Overpopulation: over population increases the competition amon population and there fore there resources become limited so few have to change or their ways of utilizing resources.

Adaption: Adapting the change takes place due to any situation in environmental that put stress on the population allow them to adapt according the change or they will extinct.

Answer:

Variation, overpopulation, and adaption

Explanation:

I can confirm this is the right answer, because I just did the assignment.

A computational biologist develops a computationally intensive program for DNA sequence alignment. When they use distributed computing techniques to run the program on four computers in parallel, they find a speedup of 4. In this case, what does a speedup of 4 indicate

Answers

Answer: The program completed in a quarter of the time with four computers versus one computer

Explanation:

Distributed computing simply means using distributed systems in solving computational problems and this is done as the problem is divided into many tasks, whereby the tasks are accomplished by one or more computers.

Following the information given in the question, a speedup of 4 indicate that the program completed in a quarter of the time with four computers versus one computer.

1. the movement of water into area with high concentration of dissolved solutes in order to equal out the solute concentration is
a) concentration
b) diffusion
c) osmosis
d) blood oxygen level​

Answers

I think the answer is osmosis.

Explanation:

The principle of osmosis states that when a semipermeable membrane separates two fluid spaces, water will flow from an area of lower solute concentration to one of higher solute concentration to achieve equilibrium so that the osmotic pressures are balanced.

Enzymes are _______. Enzymes are _______. made of protein permanently changed by the substrate made of protein, are catalysts, and permanently changed by the substrate made of protein and are catalysts are catalysts

Answers

Answer:

enzymes are biological catalysts.

Enzymes are catalysts. Therefore, option (4) is the correct option.

Enzymes are biological catalysts made primarily of proteins that accelerate chemical reactions within living organisms. As catalysts, enzymes lower the activation energy required for a reaction to occur, thus speeding up the rate of the reaction without being consumed or permanently changed themselves. Enzymes achieve this by binding to specific reactant molecules, forming enzyme-substrate complexes, which stabilize the transition state and facilitate the breaking and formation of chemical bonds during the reaction.

Once the reaction is complete, the products are released from the enzyme, and the enzyme remains unchanged, ready to catalyze further reactions. Enzymes play a crucial role in metabolism, cellular signaling, and many other physiological processes, enabling life to function effectively. Therefore, option (4) is the correct option.

Learn more about enzymes, here:

https://brainly.com/question/31385011

#SPJ6

Your question is incomplete but your full question was:

Enzymes are _______.

made of protein permanently changed by the substrate made of protein, are catalysts, and permanently changed by the substrate made of protein and are catalystsare catalysts

What's different about the 4 dams

Answers

Answer:

dams could mean the bridges

dams could be mean like something real good

It could also dams as in girl eg-damsel in distress, dams was a old word used in the 70s for girls

which of the following is not a feature of natural selection?

Answers

Answer:

naturally living organisms

Lipids and carbohydrates have many functions in the body of an organism. Specific lipids and proteins
perform specific tasks. Read the descriptions below to answer the following question: How are
triglycerides and glycogen similar in their primary function?

A. Both act as catalysts.
B. Both store genetic information for the organism.
C. Both support the structure of the organism.
D. Both store energy used by the organism.

Answers

Answer:

D. Both store energy used by the organism.

Explanation:

Sejak bilakah mereka berkawan?​

Answers

What does this mean?


State the structure by which the embryo develops and grows.

Answers

Answer:

the structure by which the embryo is called the oblica cord

It’s placenta that connects embryo to mom’s body through which all sort of exchange takes place.

What are practical applications of genetic engineering?

Answers

Answer:

Medicine, agriculture, animals, and even human mutations ;o

Explanation: Nothing much to explain.

A meiotic error occurred during gamete formation, resulting in an egg that has 24 chromosomes. If that egg is fertilized by a normal sperm, how many chromosomes will be in the zygote

Answers

Answer:

47 chromosomes

Explanation:

Meiosis is a kind of division that reduces the chromosome number of the daughter cells by half i.e. 2n - n. It occurs only in reproductive cells to produce sex cells or gametes. In humans, meiosis occurs to produce gametes (egg and sperm) that have 23 haploid chromosomes.

N.B: Somatic human cells have 46 chromosomes

According to this question, a meiotic error occurred during gamete formation, resulting in an egg that has 24 chromosomes. If that egg is fertilized by a normal sperm i.e. sperm with 23 chromosomes. A zygote that posseses (23 + 24) = 47 chromosomes will be produced.

Parte de la variabilidad genética que aporta la meiosis se produce en la

Answers

Answer:

Se produce durante la profase 1 de la meiosis, y en ella se da un entrecruzamiento entre una de las dos cromátidas de los cromosomas homólogos, por lo que las cromátidas resultantes son diferentes entre sí y de las originales.

Explanation:

1. How does scientific inquiry differ
from simply asking questions?

Answers

Answer:

inquiry means more than asking questions. Inquiry is a process of investigation, with thoughtful questions leading to a search for answers. Asking questions is a natural activity for all curious minds, but even figuring out what to ask takes practice.

A man with Type B blood has children with a woman with type A blood. Their children have the following blood types, A, AB, B, and O. What are the genotypes of the parents? What would be the genotypes of the parents if the offspring could only have type AB or A blood

Answers

the child has the blood type of Ab its obvious

Explanation:

only when both alleles is O, the blood group can be O. Thus both parents must have O as one allele

Thus man's genotype: BO or

[tex] { | }^{b} i[/tex]

Woman's genotype : AO or

[tex] { | }^{a} i[/tex]

When

the children can not have O blood

The children cannot have B blood

means the man have BO

[tex] { | }^{b} i[/tex]

and woman have AA

[tex] { | }^{a} { | }^{a} [/tex]

Because

if man have BB, and woman have AA

children can only have AB

if man have BB, and woman have AO

children can only have AB and B

Brainliest please~

‼️Need answer asap‼️. Which jar contains a mixture? A jar of solid carbon. A jar of carbon dioxide gas. A jar of liquid copper. A jar of copper and water.

Answers

Answer:

A jar of copper and water

Explanation:

The rest are compounds.

how to get remove black tartar from teeth.please help thank you​

Answers

Answer:

1. Brush regularly

2. Electronic or powdered toothbrushes may get rid of it

3. Rinse daily

4. Don't smoke

Explanation:

Hope this helps!

Brush your teeth regularly 2 times a day .
Avoid electric brush

In recent history, humans have influenced which parts of life on Earth?
A. Almost none of it.
B. Life on land only.
C. Virtually all life on Earth.
D. Life in cities only.

Answers

C. Virtually all life on Earth.

They have affected nearly every life form.

I’ll give you the answer later

The photos below show specialized cells of a living organism.
Based on the parts of the cells that can be observed, these cells are most
likely from the
A. skin of frogs
ООО
B. leaves of plants
C. gallbladders of animals
D. roots of plants

Answers

Answer:

B

Explanation:

i am not sure also..sorry

Other Questions
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