The molecular clock is a figurative term for a technique that uses the mutation rate of biomolecules to deduce the time in prehistory when two or more life forms diverged. The biomolecular data used for such calculations are usually nucleotide sequences for DNA or amino acid sequences for proteins.
Explanation:
How does your heart rate affect the rate at which red blood cells travel throughout your body? PLEASE HELP ME QUICK!!
Answer:
with each heartbeat,the heart pumps blood throughout our bodies,carrying oxygen to every cell,after delivering oxygen the blood returns to the heart the heart then sends the blood to the lungs to pick up more oxygen.
Which mechanism listed below does NOT cause evolution to occur?
Artificial Selection
Genetic Drift
Reproduction
Gene flow
Mutations
PLEASE HELP
1. Which is the simplified version of Kepler’s third law when one of the planets being compared is Earth?
T=r^2
T^2=r^3
T^2=r
T^3=r^2
2. Which of the following are effects of melting sea ice? Select the two correct answers.
The exposed water can radiate more heat to the atmosphere than it could when insulated by the ice cover.
The exposed water reflects back more sunlight than did the ice.
The exposed water absorbs more thermal energy from the sun than did the ice
The exposed water absorbs heat and then sinks, replaced by cooler water.
3. A group of scientists are studying observable matter in a cluster of galaxies. They conclude that the cluster has only a small percentage of the mass required to keep it from flying apart. Why does the cluster remain intact?
The orbital speed of the galaxies in the cluster is slow enough to keep the cluster intact.
Dark matter provides the mass and gravity needed to keep the cluster together.
The orbital speed of the galaxies in the cluster is fast enough to keep the cluster intact.
Baryonic matter provides the mass and gravity needed to keep the cluster together.
Answer:
1. T^2=r^3 ( or T² = r³)
2. "The exposed water reflects back more sunlight than did the ice"
and
"The exposed water absorbs more thermal energy from the sun than did the ice'
3. Dark matter provides the mass and gravity needed to keep the cluster together.
Explanation:
1. Which is the simplified version of Kepler’s third law when one of the planets being compared is Earth?
Kepler's Third law of planetary motion is the ratio of the square of the orbital period of a planet is to the radius of orbit of a planet or those of other planets.
This means that, Kepler's Third law of planetary motion states that the square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit.
Mathematically, Kepler's Third last is represented as
T² : r³
= T² = r³
Therefore, the second option,T^2=r^3 which is equivalent to T² = r³ is the correct option
2. Which of the following are effects of melting sea ice? Select the two correct answers.
The melting of sea ice causes a lot of changes in the climate of an environment.
The presence of sea ice in oceans, reduces the surface area thereby causing a minimal reflection of sunlight but once sea ice melts, the surface area of the water is increased and this would results in a reflection of sunlight.
The sea ice absorbs less thermal energy or radiation from the sun(solar energy) and keeps the surface cooler but once the sea ice is melts, the resulting water, absorbs a lot of thermal energy or radiation from the sun, causing the surface of the water to be hot.
Therefore, the options "The exposed water reflects back more sunlight than did the ice" and
"The exposed water absorbs more thermal energy from the sun than did the ice" are the correct options.
3. A group of scientists are studying observable matter in a cluster of galaxies. They conclude that the cluster has only a small percentage of the mass required to keep it from flying apart. Why does the cluster remain intact?
It has been observed that galaxies present in the solar system have an attraction for one another such that they are drawn to each by force of gravity that is present in the solar system. And because of these, galaxies form clusters in the solar system.
Dark matter is a large amount of matter that is present in the solar system. Dark matter is the reason by which galaxies can form and maintain the clusters that they form around each other because it provides them with the force of gravity and sufficient mass that the galaxies require to prevent them from separating or flying away(apart) from one another
Therefore, the option "Dark matter provides the mass and gravity needed to keep the cluster together" is correct.
The simplified version of Kepler’s third law in a situation when one of the planets is compared to Earth will be T³ = T².
The effects of melting sea ice include:
The exposed water reflects back more sunlight than did the ice.The exposed water absorbs more thermal energy from the sun than did the ice.A cluster will remain intact because the dark matter provides the mass and gravity needed to keep the cluster together.
It should be noted that Kepler's third law of planetary motion simply represents the ratio of the square of the orbital period of a planet is to the radius of orbit of other planets. This can be expressed mathematically as T³ = T².
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An interglacial is a period of time that occurs between Ice Ages. During previous interglacials, the CO2 levels in the atmosphere were about 300 parts per million (ppm). In 2013, they were approximately 420 ppm. Rounding to the nearest percent, what is the percent increase in CO2 between these two time periods?
Answer:
40% increase
Explanation:
Percentage Increase Formula:
Percentage Increase=[(Final Value−Starting Value)/|Starting Value|] ×100%
To Calculate Percentage Increase:
1) Subtract final value (later value) minus starting value (initial value)
2) Divide that amount by the absolute value of the starting value (initial value)
3) Multiply by 100 to get percent increase
Keep in mind: If the percentage is negative, it means there was a decrease and not an increase.
So for your problem,
[(420-300)/300]*100% = 40% increase
Can someone help me fill out this chart about alleles please?
Explanation:
#of individuals
80
64
56
Subirrigation requires
in India- Which places had the clearest skies
Answer:
Spiti Valley, Himachal Pradesh
Explanation:
The crystal clear views of the skies makes it one of the perfect places for stargazing in India
What percentage of Japan’s population is between the ages of 0–4 years?
Answer:
looks like about 8% to me
40 to 44 percent of people are in the range of 0 to 4 years.
What is the population?A population is a group of different people. There are three different types of population such as rapid growth, slow growth, and negative growth.
In rapid growth, the population will grow rapidly. While slow growth population grows very slowly. In negative growth population growth is negative.
In the population graph, male and female growth is shown. The darker color in the population shows males and the lighter color shows females population.
Therefore, 40 to 44 percent of people are in the range of 0 to 4 years.
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Help plz im stuck with this plant question.
Answer:
I dunno muh dude sorry aaaaaaaa
what was the purpose of the field study? keys and kingdoms worksheet
Answer:
A field study is a general method for collecting data about users, user needs, and product requirements that involves observation and interviewing. Data are collected about task flows, inefficiencies, and the organizational and physical environments of users.
Answer:
is it correct or not?
Explanation:
Which can disrupt the cell cycle?
A.mutation
B.G0 phase
C.replication
D.cancer
Answer:A.mutation
Explanation:
The human
population growth
curve looks like
a -curve
population.
Please help!!!
Answer:
C
Explanation:
It shows a j looking black line.
Answer:
i think its b good luck hope u get i right
Explanation:
Can somebody help with those 3 problems please
Answer:
first one is option A
second one option B
third is26 N
Explanation:
1.the law here is every action has an equal and opposite......
2. only unbalanced forces move objects from rest or of uniform motion
3.net force is the sum of forces ,if forces are in the same direction
hope this helps plz mark me brainliest
Which of these statements is true about autotrophs, but not heterotrophs?
A. They use sugar and oxygen to make carbon dioxide and water.
B. They use chlorophyll and oxygen to make carbon dioxide and water.
C. They use sunlight, water, and carbon dioxide to make sugars.
D. They use sunlight, water, and oxygen to make chlorophyll.
plz help
Answer:
c
Explanation:
The statements is true about autotrophs, but not heterotrophs is that they use sunlight, water, and carbon dioxide to make sugars. Thus, option C is correct.
What plants use to make food?The plants use sunlight, water, and carbon dioxide to make sugars as well as food. Organisms can be divided into autotrophs and heterotrophs according to their pathway of producing food and energy. Heterotrophs are that organism which depend on another organism for their food and energy. They get their energy from carbohydrate, protein, and fat.
Those organisms that are able to make and produce energy from energy-containing organic molecules such as glucose from inorganic raw material such as water and by using light energy such as sunlight are autotrophs. Plants are the prime autotrophs, they produce their food and energy which is sugar from water, sunlight and carbon dioxide using photosynthesis.
Therefore, The statements is true about autotrophs, but not heterotrophs is that they use sunlight, water, and carbon dioxide to make sugars. Thus, option C is correct.
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Which autonomic system is most likely to be dominant while someone is experiencing stress about an upcoming job interview?
the peripheral nervous system
the sympathetic nervous system
the somatic nervous system
the parasympathetic nervous system
Explanation:
I got it right on edj :)
Answer:
Sympathetic nevous system
Explanation:
I got it right on a edge (2021) bio quiz
Could someone please help
If you use a punnet sq. and cross the parents you see that all the children should be affected. by this thing represented by black.
What type of relationship where both organisms benefit
Answer: mutualism!
hope this helps! recently learned about this. :D
Why are "Outer planets" also called gas giants?
Answer:
"Outer" planets are also called gas giants because they are large planets that have deep, massive atmospheres made mostly of gas.
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Hope this helps :)
Sound travels as mechanical waves.
How does light travel?
as mechanical waves
as magnetic beams in a medium
as surface waves
as electromagnetic waves
Answer:
Light travels as a surface wave
Explanation:
Answer:
it's electronic waves
Explanation:
i took the test and it said that it was electronic waves not surface waves
hi i like this app is so cool
Answer:
me too I love helping people
WILL GIVE BRANLIEST!!!! 20 POINTS!!!! BLESS YOUR GRADES!!
3. Which two substances move through an ecosystem in sedimentary cycles?
A) phosphorous and oxygen
B) phosphorous and sulfur
C) sulfur and carbon
What is the purpose of the motor neuron?
to carry information from sense organs to the brain or spinal cord
to carry information from the brain or spinal cord to sense organs
to carry information from the brain or spinal cord to muscles and glands
to carry information from muscles and glands to the brain or spinal cord
Answer:
ans this question is no 3
Explanation:
Because it sends electrical output signals to the muscles affecting the muscles ability to functions.
Which of the following types of mutations does not belong with the others?
Answer:
options please
Explanation:
Theres nothing to pick from
Sodium ions are used by your body every time you move a muscle. Determine the difference between the sodium ion and the sodium atom by using the model below.
Answer:
Sodium Atom is an element in its original state and Sodium ion is that on an excited state
Explanation:
Sodium Ion is a Soduim atom that has lost one electron.
Please help out! It would be very nice !!
Answer:D
Explanation:
Cell wall provides structure and protection
Answer:
D is the answer to the question
Human blood consist of blood groups A, B, & O. However, there is one more blood group, AB, which contains alleles A and B in the same genotype. What is this phenomenon called?
Answer:
codominant inheritance
Explanation:
edge
Which is older the pebbles inside the rock or the rock surrounding the pebbles? Explain why the pebbles are older?
I need help with that question and is due today pls help me out I been struggling with it and having a hard time
Answer:
The pebbles inside the rock.
Explanation:
The outside of the rock would've formed around the pebbles.
warm fronts appear on weather maps in areas of
Answer:
On a weather map, a warm front is usually drawn using a solid red line with half circles pointing in the direction of the cold air that will be replaced. Warm fronts usually move from southwest to northeast. ... A cold front is the transition area where a mass of cold air moves in to replace a mass of warm air.
Explanation:
Answer:Which object is created during the formation of a star?
a nebula
a protostar
a supergiant
a supernova
Explanation:
An energy pyramid shows the amount of
available at each feeding level in an ecosystem.
Answer:
10%, energy/food
Explanation:
As you progress, it goes to 10% of the previous amount of energy/food.
Hope this helps!!! PLZ MARK BRAINLIEST!!!!!!
True or False: All living organisms have cell membranes.
Answer:
Yes ,each living cell possess a cell membrane,which has a
semi-permeable barrier for various foreign particles.
Explanation:
