Assuming height of the bar represents altitude, the bar representing Han Chinese will be shorter compared to that representing Tibetans since Han Chinese live at lowlands.
What is the role of natural selection in evolution in Tibetanscompared to Han Chinese?Tibetans and Han Chinese are thought to originate fro. same ancestors.
However, while the Han Chinese lived in lowland areas, Tibetans split off drom the Han Chinese about 2750 years ago and went on to live in high altitudes.
Natural selection helped Tibetans to evolve to adapt to high altitudes with several mutations occurring in their genes which are mostly related to use of oxygen by the body.
Assuming height of the bar represents altitude, the bar representing Han Chinese will be shorter compared to that representing Tibetans.
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Darwin’s finches have different beaks in terms of size and shape to be able to eat different food sources like insects, nectar, and seeds. Cactus finches have longer, more pointed beaks to probe cactus flowers compared to their relatives, the ground finches.
If a plant disease killed a large portion of the cacti on the Galapagos islands, what would the future populations of finches look like in terms of beak size and shape? Use your knowledge of natural selection to determine which option is most likely.
A. Cactus finches would compete for food with ground finches and exhibit competitive exclusion, so the beaks of future generations would be similar to whichever finch outcompetes the other.
B. Ground finches would survive and pass on their shorter and wider beaks, so there would be a higher proportion of finches in future generations that have short and wide beaks.
C. Ground finches would survive and pass on their beaks, but they would mate with the remaining cactus finches, creating a new hybrid that is somewhere between short versus long and narrow versus wide.
D. Cactus finches would compete for food with ground finches and exhibit resource partitioning, so the beaks of future generations would not change.
Answer:
The Answer should be B
Explanation:
The Knowledge of natural selection to determine which option is most likely Ground finches would survive and pass on their shorter and wider beaks, so there would be a higher proportion of finches in future generations that have short and wide beaks.
What is natural selection and example?
Natural selection is the procedure in nature by which organisms sufficiently adapted to their environment survive and replicate more than those less adapted to their environment.
For example, treefrogs are sometimes eaten by snakes and birds.
Thus, option "B" is correct.
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please help me :( i am struggling with this
Which of the following planets has the longest orbit?
A. Mercury
B. Earth
C. Neptune
D. Mars
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The Correct choice is C. Neptune !
since Neptune is the farthest planet from sun in our solar system, it has to cover the longest orbit.
The respiratory system that involves diffusion of oxygen and carbon dioxide directly into and out of cells is ______.
Answer:
Alveoli
Explanation:
they are very small air sacs which performs the exchange of oxygen and carbon dioxide takes place. CAPILLARIES are blood vessels in the walls of the alveoli.
How do multiple alleles and polygenic traits differ.
purchasing the latest version of the iPhone is an example of which of the following
Answer:
physiological motivator
Explanation:
because when you buy a phone your physiological reaction is triggered.
The La Brea Tar Pits in Los Angeles are the site of millions of fossils from the ice age. Woolly mammoths, giant sloths, dragonflies, and other plants and animals from this era have been found in these pits.
Scientists at the tar pits discovered that many of the smaller animals they extracted from the pits still exist around Los Angeles today. But many of the larger mammals—such as woolly mammoths and saber-toothed tigers—are now extinct. Why do you think this is the case? What can scientists learn about Los Angeles’ climate history by studying the specimens found in these tar pits?
Answer:
231 species
Explanation:
More than one million bones were recovered in 1906. These bones represented 231 species of vertebrates and there were 234 species of invertebrates.
Los Angeles climate is relatively stable for over 50,000 years. The fossils of more than 180 insects were preserved in La Brea Tar Pits. The climate warming probes a link for evolution of Ice Age predators.
Explanation:
Mammals like sabertooths and mammoths both are extinct because Its reliance on large animals has been proposed as the cause of its extinction, along with climate change and competition with other species, but the exact cause is unknown.
The second question you can do independently, but anyways hope this helped you!
How long are spices good for after expiration date?.
Answer:
Whole spices will stay fresh for about four years, while ground spices run between three and four years
Explanation:
What is an example of something that increased tax revenue could pay for ?
Answer:
Increased tax revenue could pay for more government-provided services. This includes things like Social Security, Medicare, food stamps for the poor, infrastructure, etc.
Basically, an increase in tax revenue can raise money for the government to pay for more things that benefit the American people as a whole
Explanation:
Olfactory receptor cells are essential for our sense of.
Answer:
Smell. They make us smell things.
Explanation:
Select the correct answer from each drop-down menu. complete the passage about earthquakes. earthquakes sometimes occur when . some underwater earthquakes shake the ocean floor and cause large sea waves that destroy property and threaten lives. such a sea wave is called .
Earthquake occurs due to friction between tectonic plates. The correct options are:
First blank: Option C: A transform boundary causes excessive amounts of friction between two tectonic plates,Second blank: Option B: tsunamiWhen does earthquake happens?An earthquake occurs when the Earth's crust moves suddenly. As the tectonic plates grind against each other, pressure builds up. Earthquake can occur when the plates collide, spread etc.
The options for first 'blank' space are:
a. A volcanic island moves away from a hotspot and it goes extinctb. The solid rock layer in the lithosphere is no longer influenced by the more fluid asthenosphere, c. A transform boundary causes excessive amounts of friction between two tectonic plates, d. A divergent boundary abruptly reserves rolls to become a convergent boundaryThus, correct statement would be:
Earthquakes sometimes occur when A transform boundary causes excessive amounts of friction between two tectonic plates.
(option C)
Now, the second blank has options:
a. an avalanche, b. a tsunami, c. a tidal wave, d. a landslideIt asks the name for "some underwater earthquakes shake the ocean floor and cause large sea waves that destroy property and threaten lives. such a sea wave is called "
Tidal waves are caused by gravity of heavenly bodies, mainly moon.Landslide is sliding of land from hillside etc places.Avalanche is falling of snow, rock and ice from a mountain or hill type region.Tsunami is correct option here, it is caused because of shaking of ocean floor.Thus, Option B: A tsunami is correct.
Thus correct statement would be:
some underwater earthquakes shake the ocean floor and cause large sea waves that destroy property and threaten lives. such a sea wave is called a tsunami
Thus, the correct options are:
First blank: Option C: A transform boundary causes excessive amounts of friction between two tectonic plates,Second blank: Option B: tsunamiLearn more about earthquakes here:
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The enzyme that travels along a template strand, assembling nucleotides into a growing DNA strand, is
Answer: DNA Polymearse 111
Pick an element in a common molecule.
-how many protons?
-how many neutrons?
-how many valence electrons?
Molecule:
-what atoms are found in your molecule?
-how many of each type of atom do you have?
-what are the atomic masses for each Atom?
SOMEONE PLEASE HELP ME IM SO BAD AT SCIENCE
Answer:
nitrogen and h20
Explanation:
protons:7
neutrons: 7
valence electrons: 5
atoms:hydrogen and oxygen
# of each type: H 2 O 1
atomic mass: H 1.00794 O 15.9994
this is all found on the periodic table btw
How does a plant grow in an overcrowded area
Answer: Nutrient Deficiencies
Explanation : Overcrowded plants must compete with each other for soil nutrients, which can result in increased fertilizer needs. Soil contains a finite amount of nitrogen and other necessary plant nutrients. The more plants there are in a small space, the more quickly these nutrients are used up.
Give an example (except for a plant responding to light) of an organism's response to a stimulus.
Answer:
plants For example, phototropism is the plant's response to stimulus, i.e. sunlight. A plant hormone “auxin” keeps the plant's direction towards the sun by activating the growth in a particular part of a stem. Similarly, gravitropism in plants responds to the stimulus, i.e. gravity
Explanation:
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How can two cells of a complex multicellular organism have the same genome, but markedly different structures and functions
Stete five importance of the soil to plant and animal
Answer:
Soil provides habitat, water, air and food for animals. Healthy soil allows for plants to grow which provides animals with shelter and materials to build it. Soil also provides food for animals as many animals eat plants as their main source of nutrition.
Explanation:
Answer:
It absorbs , holds,releases and purifies water.It provides a sustainable habitat to animals living in the soil.It helps in the growth and development of the plants.It acts as the base for building homes,roads and buildings.It helps to regulate the earth's temperature.The four cells produced in meiosis will have a
Answer:
At the end of meiosis, all four cells formed are identical as far as the number of chromosomes is concerned, but will not be identical to each other as far as the genes present on the chromosomes.
Hope this helps :)
Bacteria that are able to survive in an alkaline environment having bile salts present are adapted to living in the
Which procedure involves the destruction of a blood clot using anticlotting agents called clot-busters
Answer:
Lytic therapy - A clot-busting medication given in the hospital into the blood vessel to break up clots. The treatment has a risk of bleeding.
hello people ~
help me with this :
Fill in the blank -
Two or more genes that are located on the same chromosome are__________
linked genes.
.........
Which of the following statement accurately describes the nervous system?
A. Neurons are directly connected to one another and send chemical messages throughout the body.
B. Nerves make up neurons, which are directly connected to one another and transmit electrical messages throughout the body.
C. Nerves transport chemical messengers known as hormones throughout the body.
D. Neurons do not directly touch, but transform electrical messages into chemical messages to transmit the message to the next neuron.
Answer:
D
Explanation:
There are spaces between neurons called synapses
A population of fish lived in a large lake. During a storm, a huge landslide occurred, bringing a large amount of land into the lake and splitting the lake into two bodies of water. Over many years, the fish population in each body of water evolved. The two fish populations can no longer breed together.
Is the speciation above an example of allopatric speciation or sympatric speciation? Explain how you know by referring to the definition of each.
Answer: Allopatric speciation
Explanation: Because in allopatric speciation, groups from an ancestral population evolve into separate species due to a period of geographical separation.
I searched it up and both don't fit this 100% so I am kinda just making a guss because the first part on this sounds right but the 2nd part doesent and on the other one the first part sound wrong but the 2nd part sounds correct.
Sorry if its wrong.
The given example shows allopatric speciation, because due to a storm, a huge landslide occurred, bringing a large amount of land into the lake and splitting the lake into two bodies of water.
What is allopatric speciation?A period of geographic separation causes groups from an ancestral population to diverge into distinct species in allopatric speciation. Without any geographical separation, groups from the same ancestral population diverge into distinct species in a process known as sympatric speciation.
While parapatric or sympatric populations live in the same habitat, allopatric populations are physically isolated from one another.
Therefore, while sympatric species share a single ecological niche, parapatric populations occupy different environmental niches and are thus divided by ecological variables.
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During which phase of meiosis are the chromatids first separated from each other?.
Answer:
In the anaphase II
Answer:
During which phase of meiosis are the chromatids first separated from each other? Anaphase
Explanation:
The chromosomes move away from one another to opposing poles of the spindle during meiotic or mitotic cell division.
Importance of soil pollution
Answer:
Besides air pollution, four other important types of pollution are soil, water, waste, and noise pollution -D.
Noise pollution comes from being overly loud compared to other species. Humans create a lot of noise pollution in cities where there is a lot of things going on and with that we create a lot of damage to the environment.
Explanation:Hope it's helps you ! : )
Answer:
Soil pollution causes a chain reaction. It alters soils' biodiversity, reduces soil organic matter and soils' capacity to act as a filter. It also contaminates the water stored in the soil and groundwater, and causes an imbalance of soil nutrients.
Explanation:
hope it helps you
Muscles receive messages from
a. motor neurons
b. interneurons
c. sensory neurons
d. effectors
pls help
Answer:
motor neurons
Explanation:
muscles contraction begins when the nervous system generates a signal.The signal, an impulse called action potential, travels through a type of nerve cell called motor neuron. The neuromuscular junction is the place where the motor neuron reaches a muscle cell.
Answer:
a. motor neurons
Explanation:
i hope this helps let me know if its wrong
What is one important FUNCTION of our skin?
Answer:
Ans :
Explanation:
Provides a protective barrier against mechanical, thermal and physical injury and hazardous substances. Prevents loss of moisture. Reduces harmful effects of UV radiation. Acts as a sensory organ (touch, detects temperature.
hope it helps
does anyone know the meaning of "donor gene"? It's for my biology class.
Answer:
During conjugation, one bacterium serves as the donor of the genetic material, and the other serves as the recipient. The donor bacterium carries a DNA sequence called the fertility factor
Explanation:
Answer:
The definition of a donor is:
One that gives, donates, or presents something.
Explanation:
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Assertion (A): Chromosomes are responsible for the transfer of characteristics from parents to offspring.
Reason (R): Chromosomes are present in the nucleus.
A. Both A and R are true and R is the correct explanation of A
B. A is true but R is false
C. A is false but R is true
D. Both A and R are true but R is not the correct explanation of A
Answer:
Option B
Explanation:
In the nucleus, thread-like structures called chromosomes are present.These carry genes which contain all the information needed by the cell to function and to reproduce. IGenes are also responsible for all the characteristics of an individual. Thus, genes are responsible for inheritance i.e., transfer of characteristics from the parent to the offspring.
compare and contrast biotic and abiotic factors using a venn diagram include 3 examples for each
Answer:
A biotic factor is something living that affects its environment around it including other biotic factors and aboitic factors. Examples include grass, cows, spiders
A abiotic factor is something nonliving that affects it's environment around it and the organisms in it. Examples include climate, sunlight, temperature, and water
Explanation:
A biotic factor is anything living that influences both biotic and abiotic variables in its surroundings. Examples include cows, spiders, and grass. while the Abiotic factors are things that are not living but have an impact on the environment and the organisms inside it. Climate, sunlight, temperature, and water are among examples.
What are Biotic and Abiotic factors?All the organisms in the ecosystem have a relationship with biotic variables. The biological byproducts they produce and their presence alter an ecosystem's structure. All living things, including people, fungi, and bacteria as well as animals and plants, are considered to be biotic factors. For each species to reproduce and to meet basic needs like food, the interactions between numerous biotic variables are vital.
Any non-living, chemical, and physical elements that exist in the atmosphere, hydrosphere, and lithosphere are referred to as abiotic factors. Abiotic variables include things like sunlight, air, precipitation, minerals, and soil, to name a few. These elements significantly affect the persistence and procreation of species within an ecosystem.
Thus, examples of Biotic factors include cows, spiders, and grass. while the abiotic factors examples are climate, sunlight, temperature, and water.
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