Why didn’t Darwin think you could observe natural selection in a lifetime?

Answers

Answer 1

Answer:

There aren't enough generations visible within a lifetime to have any visible changes or evidence of natural selection. Essentially, evolution takes much longer than 1 lifespan to happen.


Related Questions

10. An automobile headlight has a resistance of 40 ohms when attached to a standard 12 volt battery. How much current flows through the headlight?

Answers

Answer:

Current flows I = 0.3 Ampere

Explanation:

Given:

Resistance = 40 ohms

Voltage = 12 volt

Find:

Current flows

Computation:

I = V / R

Current flows I = 12 / 40

Current flows I = 0.3 Ampere

What phyla is this animal?





Platyhelminthes

Nematoda

Annelida

Cnidarian

Answers

Answer:

Annelida

Explanation:

Hope this helps

*
Which example is NOT an outcome of the ecosystem modifying a phenotype?
A.the changing of the color of an animal's fur as the temperature changes
B.the increased intelligence of a person who attended school for many years
C.the pink-flowered snapdragons that result from crosses between red-flowered and
white-flowered snapdragon plants
D.the very short stature of a kind of tree that grows at a high altitude in comparison with
the same kind of tree growing at a lower altitude

Answers

Answer:

The pink-flowered snapdragons that result from crosses between red-flowered and white-flowered snapdragon plants

Explanation:

A sea anemone has tentacles (similar to jellyfish) that deliver a chemical sting to animals that come in direct contact with them. Clownfish, however, are immune to the sea anemone's sting. They live among the tentacles of sea anemones and rely on the anemones for protection.

Sea anemones are filter feeders, and the movement of the clownfish increases the current of water flowing through the anemone. In addition, clownfish tend to drop scraps of food as they feed. What type of relationship exists between the clownfish and the sea anemone?
A. parasitism
B. predation
C. mutualism
D. commensalism

Answers

Answer: C mutualism

Explanation: the anemone provides the clownfish with protection and shelter, while the clownfish provides the anemone nutrients in the form of waste while also scaring.

The type of relationship exists between the clownfish and the sea anemone is option c. mutualism.

What is mutualism?

It refers to the ecological interaction that lies between two or more species at the time when each and every species has a net benefit.

Here, the anemone gives the clownfish along with the protection and shelter while on the other hand, clownfish gives the nutrients of anemone that could be in the form of wastage.

hence, the option c is correct.

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What is stored energy?

Answers

Energy storage is the capture of energy produced at one time for use at a later time to reduce imbalances between energy demand and energy production. A device that stores energy is generally called an accumulator or battery.

Please help !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

Your answer should be A Mitosis

Explanation:

In a genetic cross between plants, the alleles are denoted as P and p, where P is purple flowers and p stands for white flowers, which one is considered the dominant allele for flower color?

Answers

The answer would be P is purple flowers.

Form a hypothesis that explains your choice. You will be able to revise your hypothesis after performing experiments.

Answers

Hello. You have not informed the experiments to which the question refers, which makes it impossible for hypotheses to be formed. However, I will try to help you in the best possible way.

A hypothesis is an assumption, that is, it is a statement that the researcher believes to be true in relation to the research results, which can be proven or denied when the experiment is finished and the conclusions are established. Therefore, you must make assumptions about the results of the experiment, based on your primary visualization of them.

A murder occurs in a nursing home during a night full of thunderstorms and pouring rain. The victim is discovered lying on the plush carpet of the rec room, bleeding from a wound to the head. The staff assures investigators that there must have been a break-in because no one who lived or worked at the facility would do something like that. Considering the Principles of Trace Evidence, what would investigators be looking for to prove that someone entered from outside the facility?

Muddy or wet footprints in the carpet
The discovery of a murder weapon
Letters to the victim from a sick relative
Blood spatter from the victim's head wound

Answers

Answer:

Muddy or wet footprints in the carpet

Explanation:

Is this a question for school or is this some riddle?

Answer:

a

Explanation:

just took the test

Which of the vulture's five senses is most unusual and why?

Answers

Answer:

bc

Explanation:

4. Which of the vulture's five senses is most unusual and why? Vultures have a great sense of smell. This is unusual because most birds can hardly smell at all.

Included classifications: California condor; Andean condor

What type of microscopy would you use to study the detailed internal structure of a mitochondria? A.Light microscopy B.Scanning Electron Microscopy C.Transmission Electron Microscopy D.Electron microscopy

Answers

Answer:

C: Transmission Electron Microscopy

Explanation:

Transmission Electron Microscopy shows the complex internal membrane structure of mitochondria

// Please help !!!!!!!!!!

Answers

Answer: Caterpillars and Meadow voles

8. Which of the following shows an example of extinction?

A: Two species of caterpillars compete for the same food
B: Two species of caterpillars breed to create a new species
C: A generation of caterpillars all metamorphosize into butterflies
D: An entire species of caterpillar dies off

Answers

Answer: D

Explanation: hope this helps

how does the body's organization enable it to function

Answers

Answer:

All of the body's internal organs and systems rely on each other to function in harmony and this is what enables the body to function

Explanation:

How does the stomach protect itself from being digested by its own gastric juices?
a]it secretes mucin that coats the lining
b]the pancreas adds insulin to the stomach
c]it squeezes gastric juices only in the middle
d]the liver sends bile to the stomach

Answers

The answer is a] it secretes mucin that coats the lining

1. Define los siguientes pares de conceptos a partir de su semejanzas y diferencias A. ADN – ARN B. Acido Nucleico – Nucleótido C. Aminoácido – Proteína

Answers

Answer:

Las similitudes y diferencias entre ADN - ARN, ácido nucleico - nucleótido, aminoácido - proteína son las siguientes.

Explicación:

El ADN es similar al ARN debido a la presencia de cuatro bases nitrogenadas. La diferencia entre que tiene tres mismas bases nitrogenadas mientras que una es diferente. El ADN es bicatenario mientras que, por otro lado, el ARN es monocatenario. El ADN se considera más estable en comparación con el ARN sobre la base de su estructura.

Los nucleótidos son los componentes principales de los ácidos nucleicos, mientras que los ácidos nucleicos son los componentes básicos de la vida. Los nucleótidos están formados por nucleobase, azúcar de carbono y fosfato, mientras que, por otro lado, los ácidos nucleicos están formados por nucleótidos.

Los aminoácidos son los componentes básicos de las proteínas, lo que significa que las proteínas están hechas de aminoácidos. Las proteínas están conectadas entre sí, mientras que los aminoácidos libres no están conectados.

Which of the following describes positive feedback?
Select one:

A. A loss of output from the body’s receptors.

B. The response of the body to increased temperatures.

C. An event that reduces the effects of a stimulus.

D. An event that enhances the original stimulus.

Answers

C explaination: because you would be receive any bad effects

Which of the following improves your range of motion and helps prevent
injuries?
A. A healthy body composition.
B. Strong flexibility,
C. Strong cardio-respiratory endurance.
D. A good sense of balance.
SUBMIT

Answers

Answer:

B. strong flexibility

Explanation:

Being flexible allows your body to move in a fuller range of motion and can help prevent injury because you aren't putting as much strain on yourself.


Choose words of phrases from the list to complete the sentences
Each word or phrases may be used once, more than once or not at all

carbon dioxide
nitrogen
anaerobic respiration
amino acids
aerobic respiration
lungs
liver
fats
kidneys
toxic

Excretion is defined as the removal of material and the waste products of metabolism.
Carbon dioxide is formed in humans during the process of .
Urea is produced in the and is excreted in the .
Urea is formed from that the body does not need.​

Answers

Answer:

amino acids

anaerobic respiration

aerobic respiration

lungs

liver

kidneys

nitrogen

toxic

Explanation:

Excretion refers to the removal of waste products that is produced from amino acids metabolism.

Carbon dioxide is formed in living organisms in the process of both aerobic respiration and anaerobic respiration and can be removed from the body through lungs.

Urea is produced in the liver and then the blood is to be sent to the kidney and which is excreted from the body.

Urea is compounds of nitrogen which is formed from amino acids that contains toxic substances which the body does not need.​

How can you prevent oxygen toxicity?

Answers

The only effective methods to prevent oxygen toxicity are to limit the pO2, the time of exposure, and to give air breaks during oxygen breathing

Having dimples (D) is dominant over not having dimples (d). If a person that is Dd has children with a person that is dd, what would be their children’s possible genotypes?

a
DD, Dd
b
Dd, dd
c
dd, DD
d
Dd, DD, dd

Answers

Answer:

A or D

Explanation:

Dd, dd would be their children's possible genotypes. Therefore, option (B) is correct.


What is genotype?

The genotype of the first parent is Dd, which means they have one dominant allele (D) and one recessive allele (d). The genotype of the second parent is dd, which means they have two copies of the recessive allele (d).

When these two individuals have children, each parent will randomly pass on one of their two alleles to their offspring. Therefore, the possible genotypes of their children are:

Dd (with a 50% chance): the child inherits the dominant D allele from the Dd parent and the recessive d allele from the dd parent.

dd (with a 50% chance): the child inherits the recessive d allele from both parents.

Therefore, the correct option is (b) Dd, dd. The children cannot have a DD genotype because the second parent does not carry the dominant D allele.

Learn more about genotype, here:

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A cell has undergone determination to become an epithelial lung cell. If it is transplanted to a leg muscle, what do you think will happen to this cell?

Answers

Answer:

Change occur in form and structure of the cell.

Explanation:

The structure and shape of the cell change because the function of leg is different from the lungs. In the lungs the epithelial lung cell is responsible for the detection and protection of the cells against pathogen while on the other hand, the leg has the function to move an individual from one place to another so due to difference in function, the cells of both regions have different shape and structure of the cell and the epithelial lung cell will be changed into a leg muscle cell.

What process happens farther up the river to bring the sediments to the delta?
A.
volcanic eruptions
B.
erosion
C.
earthquakes
D.
friction

Answers

Answer:

erosion

Explanation:

erosion is the wearing away of something by a natural force like water

How to write 778,00,000 in scientific notation

Answers

Answer:

77.8 × 106

Explanation:

The 6 is the exponet (above the 10)

What is comparative anatomy and how do scientists use it to study evolution?

Answers

Comparative anatomy helps determine organisms evolutionary backgrounds. Scientists use comparative anatomy to try and find a common ancestor for certain organisms. Have a good day!

Answer:

Comparative anatomy has long served as evidence for evolution, now joined in that role by comparative genomics; it indicates that organisms share a common ancestor.

is an important tool that helps determine evolutionary relationships between organisms and whether or not they share common ancestors. However, it is also important evidence for evolution.

Explanation:

their you go have a nice day

Which of the following cannot reliably prevent the impact of hurricanes on hurricane-prone places?

A)

restoring freshwater marshes

B)

allowing the growth of a natural buffer of trees

C)

completely preventing settlements in areas that seem prone to catastrophes

D)

encouraging people to avoid settling in areas known to be hazardous

E)

using satellite images to predict hurricanes

Answers

Answer:

I think the answer is d I hope this help

Answer:

A) restoring freshwater marshes

Explanation:

got it right on edg

What type of mutation is the example below?

Original DNA: T T T G G G A C T A T C C A T A T C

Mutated DNA: T T T A G C C T A G G G A C T A T C C A T A T C

A: point mutation
B: Frameshift Mutation
C: deletion
D: Insertion
E: Inversion

Answers

Answer:

Insertion

Explanation:

because A G C C T A was added in

In the jar shown, a sample of various sediment was mixed with water and then mixed with water and then allowed to settle for 24 hours. The jar served as a model for what process

Answers

Answer:

Process of sedimentation.

Explanation:

The jar shows us the model of sedimentation process because all the sediments settles down in the jar due to heavy weight. The sediment can't combine chemically with water and these sediments are heavier so due to gravity they comes down and settles down at bottom of the jar, this settlement of sediments in the jar is known as the process of sedimentation.

Select the true statements about mitosis and meiosis
Mitosis creates haploid cells
Mitosis creates cells with a complete set of genetic instructions
Meiosis create diploid cels
Meiosis creates cells with a complete set of genetic instructions
o Meiosis creates haploid cells
Mitosis creates diploid cells

Answers

Answer:

Mitosis creates cells with a complete set of genetic instructions, Meiosis creates haploid cells , Mitosis creates diploid cells

Explanation:

Answer the following. The first to answer corectly and provide relevent evedence will
be potentaly be given a heart, five stars, and branleist. the querstions are;

___________________ is the study of heredity.

An organism that has a __________ gene pair will always have two genes for a particular trait.

The _________________________ is a chart used to predict the traits for the offspring from a cross.

a characteristic that is not passed from one generation to the next in the genes but instead is acquired during the lifetime of an individual is called what.

A gene in a gene pair that is always expressed

The science of heredity; the study of how traits are passed from parent(s) to offspring

When both genes from a homologous pair are identical

Factors in the environment of an organism that limit the full expression of a gene

When both genes from a homologous pair are different

Two similar chromosomes; one from the mother and one from the father

The links that hold the two sides of the DNA molecule together

Answers

Answer:

Genetics is the study of heredity.

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