Explain the four main principles of natural selection

Answers

Answer 1

Answer:

Reproduction: Individuals mate to produce the next generation.

Individual variation: Individuals differ in various characteristics.

Different needs: What helps one survive does not always help another.

Resource competition: There are limited resources desired by other individuals and species.

Explanation:


Related Questions

Give two land features that can form because of deflation.

Answers

Explanation:

Deflation can form certain land features. It can pro- duce desert pavement, which is a surface made of peb- bles and small, broken rocks. In some places, the wind can scoop out small, bowl-shaped areas in sediment on the ground. These areas are called deflation hollows.

Answer:

Deflation can form certain land features. It can pro- duce desert pavement, which is a surface made of peb- bles and small, broken rocks. In some places, the wind can scoop out small, bowl-shaped areas in sediment on the ground. These areas are called deflation hollows.

Explanation:

Un tanque cilindrico de gasolina tiene 3 m de altura y 1.2 m de diámetro. ¿Cuántos kilogramos de gasolina es capaz de almacenar el tanque?
Plan: Para calcular la masa, primero debemos determinar el volumen del cilindro circular
derecho (V = irr2h), donde r = jD = 0.60 m. Por tanto, la masa se determina a partir de
la ecuación (15.1).
Solución: El volumen es
V = 7rr2h = 7t(0.6 m)2(3 m); V = 3.39 m3
Al resolver la ecuación de la densidad para m tenemos
m = pV = (680 kg/m3)(3.39 m3); m = 2310 kg
Otro método para indicar las densidades de las sustancias es la comparación su densidad
con la densidad del agua. La relación de la densidad de la sustancia con respecto a la del agua
se vuelve entonces la gravedad específica, la cual es una cantidad sin dimensiones. Si un
objeto tiene el doble de densidad que el agua, su gravedad específica es 2; un objeto que tiene
una tercera parte de densidad que el agua tiene una densidad relativa de 1/3.
La gravedad específica de una sustancia se define como la razón de su densidad con respecto a la densidad del agua a 4°C (1 000 k g /m 3).
Un mejor nombre para esta cantidad es densidad relativa, pero el término gravedad específica
se usa más ampliamente.

Answers

Answer:

HOLA, como estas?

Explanation:

Answer:

Vol+=+pi%2Ar%5E2%2Ah r = 0,6, h = 3

Masa+=+Vol%2A0,7 kg

Explanation:

Which of the following are considered renewable resources?

Select all that apply.

A
Coal

B
Wind

C
Solar

D
Oil

Answers

Answer:

B.wind and C.solar

Explanation:

hope it helps

solar and wind are the answers

‼️‼️‼️
PLEASE HELP WILL GIVE BRIANLIEST :))

Answers

Answer:

J SHAPED CURVE GIRL

Explanation:

HOPE THAT HELPS MUAH!

“When graphed, it appears as a J-shaped curve”, and “it occurs under ideal conditions with unlimited resources”

¿Cual es la importancia biológica de los estímulos umbrales?

Answers

Answer:

En electrofisiología, el potencial umbral es el nivel crítico al que debe despolarizarse un potencial de membrana para iniciar un potencial de acción.

Explanation:

En neurociencia, los potenciales de umbral son necesarios para regular y propagar la señalización tanto en el sistema nervioso central (SNC) como en el sistema nervioso periférico (SNP).

Espero que esto ayude :))

The series of diagrams below represents a process carried out by a unicellular organism. This process is know as

Answers

There’s no diagrams I would answer if I could see them

Phagocytosis is a crucial mechanism by which cells engulf and absorb foreign substances. This method is how small, unicellular organisms like free-living amoebas obtain food. Thus, option B is correct.

What phagocytosis process carries by unicellular organism?

Phagocytes, a type of living cell, devour or engulf other cells or particles through a process known as phagocytosis. An amoeba or other free-living single cell could make up the phagocyte, or it could be one of the body's cells, like a white blood cell.

In unicellular creatures, phagocytosis is a critical mechanism for nourishment; in multicellular organisms, it is a function of specialized cells called phagocytes.

Therefore, Phagocytosis is a process used by some single-celled protists, such as amoebae, to absorb food particles.

Learn more about phagocytosis here:

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Select the correct answer.
There was an overuse of fertilizers in William's farm. This led to the destruction of the crops, and William incurred huge losses. Which
management function was neglected in this process?
OA. organizing
OB. staffing
OC. planning
OD directing
O E. controlling

Answers

Answer:

OB. staffing

HOW can you be a good steward of your epigenome?

Answers

Answer: have good genes and regulate the cells case it can affect the future

i don't know.............

Why is the genetic code common to all organisms!

Answers

Answer:

Why Is DNA Considered a Universal Genetic Code? DNA is considered a universal genetic code because every known living organism has genes made of DNA. ... All organisms also use DNA to transcribe RNA, and then they translate that RNA into proteins. Every living organism uses that same system.

Explanation:

The genetic code is universal because it is the same among all organisms. Replication is the process of copying a molecule of DNA. Transcription is the process of converting a specific sequence of DNA into RNA.

 

Protein-encoding genes specify the sequences of amino acids, which are the building blocks of proteins. In turn, proteins are responsible for orchestrating nearly every function of the cell. Both protein-encoding genes and the proteins that are their gene products are absolutely essential to life as we know it.

Runoff from farmland into a river is an example of what???

Answers

Answer:

It would be a form of pollution due to the runoff of chemicals which harm the marine life while helping with the growth of algea more suitably known as

EUTROPHICATION

Explanation:

A body system is a group of organs that work together to keep the organism alive. How does the nervous system help to keep an organism alive?​

Answers

Answer: Just as the organs in an organ system work together to accomplish their task, so the different organ systems also cooperate to keep the body running. For example, the respiratory system and the circulatory system work closely together to deliver oxygen to cells and to get rid of the carbon dioxide the cells produce.

How does a landslide have a negative effect on humans

Answers

Landslide material can also block rivers and increase the risk of floods.
Deep landslides, triggered by major earthquakes or volcanic activity can destroy thousands of square kilometres of land and kill thousands of people.
Livelihoods and natural resources need to be quickly re-established after a landslide.

In humans, widow's peak (A) is dominant over a continuous hairline (a), and short fingers (B) are dominant over long fingers (b). Two individuals with widow's peak and short fingers have a child with continuous hairline and long fingers. Determine the genotypes of the parents.

Answers

Answer:

Both parents are heterozygous for the traits and exhibit the dominant phenotype → AaBb

Explanation:

Available data:

widow's peak (A) is dominant over a continuous hairline (a)short fingers (B) are dominant over long fingers (b)Cross:  Two individuals with widow's peak and short fingersF1) a child with continuous hairline and long fingers

Genotypes                        Phenotypes

AA and Aa             individuals with widow's peakaa                           individuals with no widow's peakBB and Bb             shorted-fingered individualsbb                           longed-fingered individuals

Cross:

Parentals) A-B-   x   A-B-

Note: the - symbol represents either a dominant or recessive allele.

F1)  child with continuous hairline and long fingers → aabb

Each parent provided one allele for each trait to the child. So the child inherited one recessive allele a and one recessive allele b from EACH parent. The fact that both parents could provide one recessive allele to the child for each character, indicates that both parents are heterozygous for the trait. It is the only way of having a child who expresses the double recessive trait.

Parentals genotypes → AaBb    x    AaBbChild →   aabb

Over millions of years
break down organisms into
fossil fuels, which contain carbon molecules. These carbon
molecules are then used in photosynthesis by
to make
oxygen for living organisms.
-decomposers, consumers
-decomposers, producers
-consumers, producers
-producers, consumers

Answers

Answer:

B

Explanation: "-decomposers, producers"

Which of the following accurately describes a trade-off of using a reusable
cloth bag instead of a plastic bag?
A. You have to store the cloth bags and remember them when you
go shopping
B. Plastic bags are recyclable, whereas cloth bags are not.
C. You are saving the oil required to produce plastic bags.
D. You are giving up a little bit of convenience in exchange for
environmental friendliness.
HELP PLEASE

Answers

answer: the answer is d

10. What adaptations allow polar bears to walk on ice without slipping?
O Only Pilli
O Only long claws
Pilli and long claws
Papillae and long claws

Answers

the answer is papillae and long claws

Scientific models are based on a set of observations.
Please select the best answer from the choices provided
OT
0 F

Answers

Answer:

Scientific models are based on a set of observations. Scientific models are based on current knowledge, which can limit their effectiveness when new discoveries are made. ... Scientists utilize models for a variety of different purposes, but each type of scientific model has limitations.

Explanation:

thank me later

Alina notices that when she shines a desk lamp on a mirror, nothing happens.When she shines an infrared lamp on the mirror, the mirror starts to get warmer.Why does light from the infrared lamp warm the mirror when light from the desk lamp does not?

Answers

Answer:

Because the infrared lamp gives off a type of light that the desk lamp does not, and the mirror can only take in the energy from the infrared light.

Explanation:

Answer:

Explanation:

Infrared is used for incubators when a chicken egg is about to hatch. It is the electrical frequency of electromagnetic radiation the provides heat.

Because heat is produced electrically it can be controlled with something resembling a dimmer switch (the kind of switch that dims lights in romantic restaurants). That means that the temperature can be set to the hen's body temperature.

Infrared is just below visible light.

True or falseThe study of where organisms live and how they got to specific places is called Biodiversity .

Answers

Answer:

False

Explanation:

Correct answer is biogeography

Explanation:

Biodiversity is a term used to describe the enormous variety of life on Earth. It can be used more specifically to refer to all of the species in one region or ecosystem. Biodiversity refers to every living thing, including plants, bacteria, animals, and humans.

In mice, albinism (b) is recessive to normal brown coloration (B). When an albino female was crossed with a brown male, they produced 2 brown offspring and 2 albino offspring. What is the genotype of the brown male parent?

Answers

Answer:

Bb is his genotype. He passed his dominant allele 50% of the time and his resessive allele 50% of the time.

Why did the timber industry do so well in the 1990s?

Answers

Answer:

A lot of technology improved production. There were no laws restricting harvesting timber. The economy was good and housing was in high demand. The United States was the only country that exported timber.

Hope this helped !

Answer:

The economy was good and housing was in high demand.

Explanation:

The natural extinction of a predator can negatively affect the
environment by leading to
unrestricted prey species growth.
major climate change
harmful human pollution.
increased sediment deposits.

Answers

Answer: A

Explanation:

With a decrease in predators there is no challenge for the prey and population growth can become uncontrollable

Hope this helps

What are the reactants in
photosynthesis?

Answers

Explanation:

Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive.

Which statement is true about human population today?

A) Population is declining for the first time in history.

B) Population is rapidly declining in urban areas.

C) The time required to double the population is going down.

D) Human population is now about 5 billion.​

Answers

Answer:

The time required to double the population is going down.

Explanation:

2022 Accelerate (option D)

According to the human population today, the time required to double the population is going down.

What do you mean by human population?"Population is the whole number of inhabitants occupying an area and continually being modified by increases (births and immigrations) and losses (deaths and emigrations)." As of now, the rate of birth and immigration is higher than that of death and emigration, due to which population is increasing rapidly.The current human population estimated to have exceeded 7.9 billion.

Hence, the correct option is C. The time required to double the population is going down.

To know more about human population here

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PLs, help me with this question

Answers

Answer:

Amino acids

Explanation:

Amino acids because it’s an acid

The image below represents two waves X and Y, traveling to the same medium at the same speed how are the two waves different?

Answers

Answer: D is right

Explanation:   It seems both waves have same wavelength.

Because speed = wavelength · frequency  (v = λf)  and

f = v/λ, so frequency is same.  Because period T = 1/ frequency, also periods are same.  Wave Y has higher amplidude and its energy is greater.

Answer:

D

Explanation:

just had it on study island

What would happen to the darker colored moths if the forest was light colored?

Answers

Answer:

Dark motgs live longer in a dark forest so they had more time to breed all living things respond to natural selection.

Due to their new distinguishable looks, with natural selection, they’d be more prone to death.

describe the following Characteristics of Life display organization growth development requires energy reproduction respond to stimuli and maintains homeostasis​

Answers

Answer:

These characteristics of Life are very important.

Explanation:

Organization growth, development requires energy, reproduction respond to stimuli and maintains homeostasis​ are the characteristics of Life. These characteristics are very important for survival and for a good life. In the absence of these characteristics, the organisms will die. Energy is required for  the growth and development of an organisms. Equilibrium is maintained in the body of organism by maintaining homeostasis in the body which resist change in the body.

An enzyme with Km = 3x10-4 M was tested with an initial substrate concentration of 10-6 M. Within one minute, 5% of the substrate had reacted. a) What percentage of substrate will have reacted in 5 min? b) If the initial concentration of substrate was 8x10-7 M, what percentage of substrate will have reacted in 5 min? c) Calculate Vmax. d) A concentration of 9x10-7 M, how long will it take for 50% of the substrate to react? e) A 10-6 M concentration, how long will it take for 75% of the substrate to react?

Answers

Answer:

[S] = 0.02 , Km = 1.2 x10^ -4 , rate = dP/dT = product formed per time = 2.7 x 10^ -6 moles /30 = 9 x10^ -8 we know rate = vmas

Explanation:

Overfishing decreases the population of trout living in a river.
What would also decline because of the decreasing number of trout?
A mayflies that are part of the trout's diet
B. eels that compete with the trout for food
C. birds that use the trout as a source of food
D. fish that lay eggs that are eaten by the trout

Answers

Answer:

C. birds that use the trout as a source of food

Explanation:

Living organisms feed on one another in their natural environment in order to obtain energy for their various activities. According to this question, overfishing by humans decreases the population of trout living in a particular river.

This means that in that aquatic ecosystem (river), the population of organisms that feed on trout as a source of energy will also decrease. In this case, it is the birds. Hence, birds that use the trout as a source of food.

Answer:C

Explanation:

Because birds use that as a source of food.

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