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

Please help me

3. What is the difference between society and culture?

Answers

Answer:

A culture represents the beliefs and practices of a group, while society represents the people who share those beliefs and practices. Neither society nor culture could exist without the other.

If you have 52.4 grams of hydrogen and 52.4 grams of heliumwhich one has a greater mass ? Why?

Answers

Answer:

Explanation:

I d k this hard

i have no clue but i think it’s Equal

how Greenhouse gases in the atmosphere impact Earth’s global climate

Answers

Answer:

They impact it by heating up the atmosphere by trapping heat

explain went experiment​

Answers

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When Went placed the agar block on one side of the decapitated shoot, the shoot curved away from the agar as it grew. This demonstrated that some kind of hormonal signal had diffused into the agar from the coleoptile tips. ... Went's experiment represented the first time that anyone had isolated a hormone from plants.

Thanks hope it helps


The presence of which magnetic feature best explains why a magnet can act at a distance on other magnets or on objects containing certain metals?
O fields
O dipoles
O domains
O forces

Answers

Answer:

Option: A) fields

Explanation:

Answer: A) Fields

Explanation:

I just took the test.

what kind of flower is this?

Answers

Answer: could be Trifolium repens Aka the white clover

Explanation:

When wax is heated, it turns into a liquid. How are the wax molecules affected by this change of state?

Answers

answer:

the molecules gain more energy and the space between the molecules increases

explanation:

when wax is heated, the molecules of wax gains kinetic energy and move about randomly until the inter molecular forces binding them together is broken and the wax turn into liquidIn the liquid state, the molecules have more free movement, so they spread out and the distances between them increasecredits: https://brainly.com/question/2755409

How does the carnivorous plant catch its victums?

Answers

Pitfall traps (pitcher plants) trap prey in a rolled leaf that contains a pool of digestive enzymes or bacteria. Flypaper traps use a sticky mucilage. Snap traps utilise rapid leaf movements. Bladder traps suck in prey with a bladder that generates an internal vacuum.

Answer:

They use special traps that are connected to them.

Explanation:

For example, the Venus Flytrap uses it's "mouth" to close on the fly. A sundew plant uses sticky spines to stuck to the bugs and slowly curls up and digests the bug.

What are the two parts that describe the measure of force? (your own answer)​

Answers

Answer:

Force can be measured by the amount of mass in the object and how fast that object is accelerating.

It can also be measured by the change in momentum and the time taken.

Need help!!!!! I need this page solved !!

Answers

Answer:

1. Igneous

2. Compacting and cementation

3. Igneous

Do mutations in body cells contribute to genetic variation?(1 point)

A) No, the causes of body cell mutations are outside the body and cannot alter DNA.

B) Yes, the mutations can be passed on to offspring and contribute to variation in the population.

C) Yes, these body cell mutations lead to mutations in the gametes.

D) No, the mutations cannot be passed to offspring and only affect the individual.

Answers

A mutation is the alteration of the genetic sequence of an organism, which can either be inherited or cannot be inherited. The mutation when transmitted to the offspring leads to genetic variation.

The correct answer is:

Option B. Yes, the mutations can be passed on to offspring and contribute to variation in the population.

Mutation is the change in the genetic sequence of the organism, which can be caused due to environmental factors and can be inherited.

The mutations can lead to genetic disorders, chromosomal disorders, or any other conditions. The mutations like a disease or adaptation that can be passed onto the offspring can result in genetic variation.

The mutation leads to genetic diversity, as the mutation is also the first step towards evolution. The organisms better suited to the environment will survive more and adapt more. These changes in the organisms will be inherited by the offspring leading to genetic variation.

Therefore Option B is correct.

To know more about mutation, refer to the following link:

https://brainly.com/question/4222118

Case Study no. 1
A 35 year old woman complains of muscle weakness, anxiety and depression.
Questions:
1. Which disorder account for the symptoms?​

Answers

Answer:

the disorder that muscles weaken, axiety and depression is hypothyrodism.

Explanation:


Which of the following MOST influenced scientists to conclude that the fossils found in the Philippines were from a new human
species?
(A)
the tools that were found near the fossils
(B)
the unique shape and size of the fossils
(C)
the location where the fossils were discovered
(D)
the age of the fossils that were tested

Answers

Answer:

c

Explanation:

next me my question ☺️⁉️

Is this wrong? I lost my Nanna 2 years ago, and I still cry at night because I miss her...

Answers

Answer:

nope

Explanation:

its right.........

What would happen within a few months if all decomposers on Earth disappeared overnight?
There would be an overabundance of organic waste.
Plants would grow out of control.
Animals would grow out of control.
There would be no visible impact.

Answers

Answer:

There would be an overabundance of organic waste.

Explanation:

I took the same test :)

Name three large molecules that make up the bulk of the food humans eat, and identify the products of each one that result from digestion.

Answers

The body breaks down nutrients from food and drink into carbohydrates, protein, fats, and vitamins.

CARBOHYDRATES. Carbohydrates are the sugars, starches, and fiber found in many foods.

PROTEIN.

FATS.

VITAMINS.

Explanation:

I hope this is what your looking for. If not, let me know!

(this answer is from www.msdmanuals.com, turn this information into your own words. I am giving credit. :)

The three large molecules that make up the bulk of the food humans eat are:

CarbohydrateProteinFats

the products of each one that result from digestion are;

Carbohydrate : Fructose, glucoseProtein : Amino acidFats:monoglycerides and fatty acids.

large molecules are the giant molecules that is been found in our daily diet and this includes Carbohydrate, Protein, Fats.

However after digestion of these large molecules after enzymes have reacted on it they will give the products which was listed above.

Learn more about large molecules

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The least specific level of classification is:
A.Phylum
B.Domain
C.Order
D.Genus

Answers

Answer:

species

Explanation:

use this acronym king pharaoh can order for general scientists. king for kingdom, pharaoh for phylum,can for class,order for order, general for genus and scientists for species

Answer: the answer is c

Explanation: C. Provide a root to the phylogenetic tree by choosing a noncontroversial out group. D. ... B. domain, kingdom, class, phylum, order, family, genus, species. C. i hope this helps i learnd this way in class

what is the powerhouse of the cell. i give brainliest

Answers

Answer:

mitochondrion

Mitochondria generate most of the cell's supply of adenosine triphosphate (ATP), used as a source of chemical energy. A mitochondrion is thus termed the powerhouse of the cell. Mitochondria are commonly between 0.75 and 3 μm ² in area but vary considerably in size and structure. Unless specifically stained, they are not visible.

Explanation:

Please mark Brainliest, it really helps.

Answer:

mitochondria, the power house of the cell.

Explanation:

i an Superior to all.

Which of the following correctly describes the cell cycle?
A: Event in the normal life cycle of a cell

B:Events in the normal life cycle of a human

C:Event that change DNA

Answers

Answer:

A: Event in the normal life cycle of a cell

The body temperatures of ectotherms, like lizards and turtles, can fluctuate with the environment. How do ectotherms maintain homeostasis?

Answers

Endotherms, such as birds and mammals, use metabolic heat to maintain a stable internal temperature, often one different from the environment. Ectotherms, like lizards and snakes, do not use metabolic heat to maintain their body temperature but take on the temperature of the environment.

Draw your own Punnett square using the following data.
he mother has long fur:
(F)
F = long fur
Che father does not have long fur: (ff)
f = short fur

Answers

Answer:

The alleles of the mother are : FF

The alleles of the father are : ff

The Punnett square will be:

      |   f   |   f  |

  F  |  Ff  |  Ff  |

  F  |  Ff  |  Ff  |

the substance present in the cell wall is protein true or falseboth animal and plant cells have cell membrane true or False​

Answers

Answer:

true and true

Explanation:

Please help, Its for kahoot

Answers

Answer:

blue one

Explanation:

it is mutualism, because both of them benefit

Answer:

Mutualism

Explanation:

Bee gains nectar and flower is pollinated.

Crossing a red-flowered four o’clock with a white-flowered four o’clock will produce pink-flowered offspring. This is called
1) incomplete dominance
2) codominance
3) F2
4) recessive

Answers

disks oak icoeoco isidro

Answer:

incomplete dominance

Explanation:

help asap
6th grade science

Answers

Answer:

true.......

Explanation:

.........

Answer: True.

Explanation: All facts mentioned are true avout plant cells...........

The leaves of plants have many specialized structures. Which statement explains the importance of the stomata and guard cells for the plant?
o They protect the plant from pests
o They are involved in plant reproduction
They work together to regulate water loss and gas exchange.
o They regulate the amount of water that enters the plant for cellular respiration

Answers

Answer:

They work together to regulate water loss and gas exchange.

They work together to regulate the loss of water and exchange of gases.

Stomata and guard cells

The tiny pores or openings in plant tissue, which allow for the exchange of gases are known as stomata.

The unique cells, which surround stomata and work to close and open the stomatal pores are known as guard cells.

Both these helps a plant to take in carbon dioxide at the time of photosynthesis and also assist in reducing the loss of water by getting closed when conditions are dry and hot.

Thus, stomata and guard cells work together to regulate the loss of water and gas exchange.

Find out more information about stomata and guard cells here:

https://brainly.com/question/7602098

What determines the
carrying capacity in an
ecosystem?
A. The number of different species in
the ecosystem
B. Limiting factors
C. Only biotic factors
D. Only abiotic factors

Answers

Answer:

B

Explanation:

The limiting factors tell you what chances you have to survive in the ecosystem. In fact, it is the primary basis which you will have to plan on because I you don't, it's disadvantages will take you unawares.

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.

Which of the following organisms can be used by humans for selective breeding? Choose all that apply.

15 points btw

Answers

Answer:

All of the above.

Explanation:

Selective breeding is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits by choosing which typically animal or plant males and females will sexually reproduce and have offspring together.

All of the above :)









What does the Greek Root "pro" mean?

Answers

Answer:

The prefix pro- primarily means “forward” but can also mean “for.” Some words that the prefix pro- gave rise to are promise, pro, and promote. When you, for instance, make progress, you are stepping “forward,” whereas if you give the pros in an argument, you are speaking “for” something by stating its advantages.

Explanation:

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