Allopatric speciation, the most common form of speciation, occurs when populations of a species become geographically isolated. ... Selection and genetic drift will act differently on these two different genetic backgrounds, creating genetic differences between the two new species.
Give 4 ""combining evidence"" in favor of organic evolution.
Answer:
1. Fossil record
2. Comparative anatomy
3. Embryology
4. Biogeography
Explanation:
Evolution is descent with modification. The organic evolution theory states that present complex life forms have evolved from the earlier (simpler) forms of life over time. Some of the most important pieces of evidence in support of the theory of organic evolution are:
1. Fossil record: fossils are dead remains of past living organisms preserved in the rocks of the remote past. These fossils demonstrate the existence of past living organisms that are related to present-day organisms.
2. Comparative anatomy refers to the study of similarities in the anatomy of different species, which provides direct evidence for identifying common ancestry between related species.
3. Embryology: the more recent the ancestor is that two species share, the greatest similarities in embryo structures and the more closely related the species are. In this regard, it is important to highlight that often homologous organs/structures (i.e., organs/structures descended from a common ancestor) can be observed only in embryos.
4. Biogeography refers to the spatial distribution of organisms and species. Species distribution reflects the evolutionary process when it is combined with geological change. For example, taxa that had already appeared before the separation of the continents are often distributed worldwide.
A ray of light travelling in medium 1 strikes and travels into another transparent medium, medium 2. If the speed of light is greater in medium 1, the ray will
The question is incomplete, the complete question is;
A ray of light travelling in medium 1 strikes and travels into another transparent medium, medium 2. If the speed of light is greater in medium 1, the ray will ............ *
refract away from the normal.
undergo total internal reflection.
refract towards the normal.
have an angle of incidence smaller than the angle of refraction.
Answer:
refract towards the normal.
Explanation:
Refraction refers to the bending of light waves or change in the direction of light waves as a result of change in the speed of light at the boundary between two media.
Whether the rays bend towards or away from the normal depends on the density of the both media. When light travels from medium 1 to medium 2 and medium 1 is less dense than medium 2(shown by a greater speed of light in medium 1 than medium 2) then the ray of light refract towards the normal and vice versa.
Which nonmetal is used as a food?
O rock gypsum
O rock salt
O quartz
O talc
Answer:
B. Rock salt
Explanation:
Answer:
B. Rock salt
Explanation:
Question 4
In this Food Web Pyramid Which type of consumer gets only 10% of the energy stored in plants?
A. Herbivore
B. Carnivore
C. Omnivore
D. Secondary Consume
Answer:
Herbivore, of course, I'm really sure that we all know exactly what a herbivore is, but as a refresher, a herbivore is like a vegetarian, they have a diet strictly based on plants. Carnivore's eat meat, not vegies, and an omnivore eats both, most humans are labeled as omnivores, except vegetarians. So your answer is Secondary Consume. This is because they only receive 10% in vegies, Primary Consume get 90%, Herbivores are Primary Consume's.
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Answer:
An Ocean Shore
Explanation:
The wind would erode and deposit sand from dunes, and the water from the waves will erode rocks.
Answer:
the open ocean
Explanation:
In the pictures above, someone is holding ice cubes; it feels cold and they begin to
melt. Which of the following describes what is occurring?
Answer:
As shown in the pictures above, the ice is absorbing heat energy from the hand and the surroundings, which results in the melting of the ice- a process of change of state from solid to liquid. The hand feels cold .
Note: The question is incomplete as it is lacking some details.
Explanation:
Melting is a change of state process which involves the change from solid to the liquid state. Solids when they absorb heat, change to liquids at a temperature known as the melting point. This change of state occurs because the molecule of the substance acquires enough energy which to be able to overcome the intermolecular forces holding the ice crystals together, as a result, the molecules begin to melt.
In the picture,the melting of the ice held by the hand is because the ice absorbs heat from the hand as well as from the surroundings . As a result of this loss of heat from the hand, the hand feels cold after. The process of this heat transfer is by conduction whereby heat is conducted away from the hand in order to melt the ice which is contact with the hand.
How does the proportion of hydrogen and helium in the universe support the Big Bang theory?
A. It is the proportion predicted to be present in the early universe.
B. It demonstrates the rate of expansion predicted by the theory
C. lt proves that matter must be formed under high temperatures
D. It shows that only simple elements are present in the universe
Answer:The answer is A
Explanation:I have had the question before
Answer:
it is a
Explanation:
Suggested evidence of natural selection at work in humans is the observation of Select one: a. low hemoglobin levels despite high elevation in Tibetan populations over generations b. increase in hemoglobin level when the average person travels from low to high elevation c. an increase in body fat in preparation for winter months at high elevation d. increase in muscle mass from extensive weight training over several months e. mountaineers using oxygen tanks when climbing at high altitude
Answer:
a. low hemoglobin levels despite high elevation in Tibetan populations over generations.
Explanation:
Natural selection can be defined as a biological process in which species of living organisms having certain traits that enable them to adapt to environmental factors such as predators, competition for food, climate change, sex mates, etc., tend to survive and reproduce, as well as passing on their genes to subsequent generations.
Simply stated, natural selection entails the survival of the fittest. Therefore, the species that are able to adapt to the environment will increase in number while the ones who can't adapt will die and go into extinction.
A suggested evidence of natural selection at work in humans is the observation of low hemoglobin levels despite high elevation in Tibetan populations over generations. This is as a result of a low level of oxygen in the blood of a living organism such as humans.
Why do you think the winter layers are darker than the summer layers in the ice core?
Screen shot is included
Answer:
Why do you think the winter layers are darker than the summer layers in the ice core? The winter layers are darker than the summer layers because little snow falls in the winter. ... The summer layers are lighter because the snow that falls in the summer is cleaner; there are fewer particles caught in the snowfalls.
Explanation:
You can put it in your own words if you want. Hope this helps!
The winter layers are darker than the summer layers in the ice core because the summer snow is less tightly packed with particulate matter, therefore, it is brighter while the winter snow is more tightly packed due to the compaction and therefore it is darker.
What do you mean by Ice core?Ice core may be defined as a structure of ice in a cylindrical shape which are plugged from the ice sheets or glaciers.
In winter, the snow that falls on the earth's surface is mixed with the more particulate matter due to compaction and hence it looks more darker as compared to summer snow.
Therefore, it is well described above.
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In feedback inhibition, does an enzyme’s substrate attaches to an allosteric site?
Answer:
They bind to an allosteric site which induces a conformational change that increases the affinity of the enzyme's active site for its substrate. This increases the reaction rate.
how do plant tissue systems work together to maintain homeostasis
Help me right know please! Past due! I will make you brianlest don’t copy and paste from the internet or your reported
hypothesis stated: the density of a liquid affects properties and how it interacts with other liquids.
How does density affect the position of a liquid relative to other liquids?
Answer:
The density of a liquid is shown by the object sinking or floating. Therfore, using this information if the object sinks then the object is more dense than the object that floats. When it comes to the density of liquids if the liquid sits on top of the water and does not mix, the liquid is less dense than water. If the liquid sinks into the water and the water sits on top, the liquid is more dense than the water.
Explanation:
bicycle tyres become flat when the weather is cold.Why?
Answer:
The tires lose air pressure in the winter because it contracts. If you have 35 lbs in the summer, with 85 degrees, when it gets cold, down to -10, your air pressure can get down to about 25 lbs. So before it gets bitter cold, inflate your tires up a little. You don’t want to be putting air in your tires once it is freezing out. Sometimes the schrader valve doesn’t seat properly because of frost and the rubber seal is hard. I have had several tires go flat on me because of this.
Explanation:
All of the following are true except?
-Nucleotides are the building blocks of proteins.
-A gene is a segment of DNA that codes for proteins which make your traits.
-Splicing removes exons from pre-mRNA.
-During transcription, adenine pairs with uracil instead of thymine on mRNA.
16. In the context of the personality research methods, determining the effect of one or more variables on behaviour....
Answer:
an experiment
Explanation:
In the personality research methods, an experiment is the method determines the effect of one variable or more variables on the behavior. In personality research methods, we conclude that :
-- it can be stable as well as predictable
-- it is based on the behavior and the personality traits
-- it is resistant to the sudden changes
What is apoptosis? plzzz help
Answer:
Apoptosis is the process of programmed cell death.
Explanation:
The proper order for the classification of organisms is
Answer:
Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species
An easy way to remember this is Dear King Phillip Came Over For Good Spaghetti.
Which statement identifies the body systems that are directly involved in the interaction
described and explains how they accomplish the interaction?
Answer:
Organ systems of the human body interact to maintain a balanced internal environment,As blood flows
Explanation:
through certain organs of the body, the composition of the blood changes because of interactions with those organs. state one change in the composition of the blood as it flows through the respiratory system.
Answer:
The reproductive system produces the ovum, and the muscular system causes the migration of the ovum by peristaltic contractions.
Explanation:
plz help i need this asap!!! Which characteristics do all bony and jawless fish have in common? Check all that apply.
backbone
swim bladder
scales
gills
bony skeleton
Answer:
Gills, Scales, swim bladder, and backbone.
Where did Watson and Crick do their work on Dna
Answer:
James Watson and Francis Crick with their DNA model at the Cavendish Laboratories in 1953.
Explanation:
as you move upward away from sea level.
In general, atmospheric pressure is greatest near Earth's surface and
decreases
stays the same
b. increases
d. doubles
a.
C.
Please select the best answer from the choices provided
A
B
C
С
D
Answer:
decreases
Explanation:
What are the types of physical quantites? pls answer in 1 minute
Answer:
Length.Mass.Time.Electric current temperature.Amount of substance.Luminous intensity.Explanation:
In physics, there are seven fundamental physical quantities that are measured in base or physical fundamental units: length, mass, time, electric current temperature, amount of substance, and luminous intensity.
which of the following is true about macromolecules
Answer:
i think A
Explanation:
A macromolecule is a very large molecule, such as a protein. They are composed of thousands of covalently bonded atoms. Many macromolecules are the polymerization of smaller molecules called monomers.
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The statement that is true as regards macromolecule is Amino acid are bonded together to make a protein.
What are macromolecule?macromolecule can be regarded as the big molecules which are the composition of smaller molecules.
For instance, very large molecule, such as a protein or carbohydrates.
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The principle of natural selection states that the best adapted organisms are most likely to survive and reproduce. Was this demonstrated in your experiment? Explain.
Answer:
Yes
Explanation:
Natural selection was first postulated by Charles Darwin. It is the idea that organisms that are best adapted to their environment are able to survive and reproduce thereby transmitting their favorable characteristics to their offspring.
In our experiment, the insects that were able to survive were allowed to reproduce thereby transmitting their favorable characteristics to their offspring. This is a demonstration of natural selection.
The root system of a grass plant interacts with the vascular system to increase the ability of the plant to Group of answer choices
a.absorb carbon dioxide for photosynthesis
b.manufacture pigments for protection
c.obtain nutrient molecules
d.carry on gas exchange and absorb inorganic substances
The root system of a grass plant interacts with the vascular system to increase the ability of the plant to obtain nutrient molecules. That is option C.
Importance of the root systemThe plant is made up of the root and the shoot systems which continually communicates for the growth and maintenance of the whole plant.
The root system is part of the plant that grows downwards. It has the following functions:
It holds the plant to the soil.It absorbs water and nutrients from the soil.It Conducts absorbed water and nutrients to stemTherefore, the root system of a grass plant interacts with the vascular system to increase the ability of the plant to obtain nutrient molecules.
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Non-living things that affect living things
1 biotic factor
2 niche
3 ecology
4 abiotic factor
Answer:
3) Ecology
Explanation:
Ask ya teacher:P
What gland is essential to the menstrual and ovarian cycles
a.adrenal
b.thyroid
c.pituitary
What particle travels in electromagnetic electromagnetic wave?
A. Proton
B. electron
C. neutron
D. Photon
Explain how the disruption can disturb the cycling of carbon ?
Answer:
Humans have breached this cycle by digging up fossil fuels and burning them, leading to carbon dioxide building up in the atmosphere faster than natural systems can soak it up. This has led to a net increase in greenhouse gases in the atmosphere, causing the planet to heat up.
Explanation:
energy
Using the Earth's internal heat to generate electricity is called
A. geothermal
B. solar
C. hydroelectric
D. wind
Please select the best answer from the choices provided
А
B
Ο Ο Ο Ο
Answer:
A
Explanation:
Geothermal power plants, which use heat from deep inside the Earth to generate steam to make electricity.
Answer: it’s A
Explanation: