Study the timeline.
Based on the timeline, about how many years ago could the oldest mammalian organism have lived?
5 million years
200 million years
1.5 billion years
4.5 billion years
Answers
Related Questions
____are compounds that produce H+ ions in solution.
Answers
Answer:
An acid is a substance or compound that releases hydrogen ions (H+) when in solution. In a strong acid, such as hydrochloric acid (HCl), all hydrogen ions (H+), and chloride ions (Cl-) dissociate (separate) when placed in water and these ions are no longer held together by ionic bonding.
Unlike any animal, people have developed_____
to increase their ability to observe and gather information.
1. Equipment
2.tools
3.instruments
4.senses
Answers
Answer:
senses?
Explanation:
unlike any animal, people have developed senses
the rest of the options would not make much sense given the sentence
What are the function of siphon of mosquito larva?
Answers
Answer:
The purpose of the siphon is to drain liquid from the reservoir by liquid flow that passes over a higher level than the liquid surface in the reservoir.
Name two important parts of the celestial sphere
Answers
Explanation:
Earth's equator, axis, and orbit.
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An advantage of light microscopes compared to electron microscopes is that light microscopes
allow you to view the surface of cells in greater detail than electron microscopes
have a higher magnification capability because they use natural light
allow you to view living cells, while electron microscopes do not
have a greater resolution available because they use white light
Answers
Answer:
allow you to view living cells, while electron microscopes do not
Explanation:
An electron microsocpes electrons will kill living samples
Answer:
allow you to view living cells, while electron microscopes do not
Explanation:
An electron microsocpes electrons will kill living samples
1.
23 cm
How many significant digits are in each of the following measurements?
Answers
Answer:
2
Explanation:
There are no zeros so the only numbers there are is 2 and 3. So two numbers equals two sig figs.
What life circumstance most directly affects the type of weather emergencies you are most likely to experience?
Your occupation
Your Income
Your location
Your race
Answers
Which statement is correct? a.The number of electrons of a neutral atom always equals the number of protons. b. The number of neutrons always equals the number of protons. c.The number of neutrons always equals the number of electrons. d.Atomic weight is identical to atomic mass.
Answers
Answer:
A
Explanation:
The number of electrone will equal the number of protons in a NEUTRAL atom
Answer:
a. The number of electrons of a neutral atom always equals the number of protons.
Explanation:
Difference between silkmoth and honeybee
Answers
The description of a cell organelle is given below.
found in plants and plant-like protists
uses energy from the sun
makes sugar from carbon dioxide and water
What organelle is being described
a mitochondrion
a ribosome
a lysosome
a chloroplast
Answers
Starfish, sea stars, and sea urchins are classified as echinoderms. What does the prefix "echin-" mean?
A
smooth skin
thin skin
С
striped skin
D
spiny skin
dry skin
Chemical reactions in the body involve heat.
Some of the reactions are called exothermic. What does the prefix exo" mean?
Answers
Answer:
The prefix "echin-" means D. The prefix "exo" means outside/external.
Explanation:
Which is one event that may lead to Primary succession? clear-cutting climate change volcanic eruption introduced species
Answers
Answer:
Primary Succession is when an uninhabited area becomes an ecosystem, and Secondary secession is when an ecosystem is destroyed an Independent factor, like a fire, a hurricane, stuff like that.
Explanation:
Clear-cutting climate change would be an example of Secondary Secession, and volcanic eruption introduced species would be an example of Primary Secession.
Primary succession occurs when new land is formed or bare rock is exposed, providing a habitat that can be colonized for the first time.
The event that may lead to Primary succession is: volcanic eruption
What are the three causes of primary succession?The main causes of ecological succession include the biotic and climatic factors that can destroy the populations of an area. Wind, fire, soil erosion and natural disasters include the climatic factors.
What organisms come first after a volcanic eruption then what happens?Lava from a volcanic eruption hardens into bare rock. Primary succession begins with soil formation. The first stage of succession involves pioneer species. In primary succession, pioneer plants are those that can grow without soil, such as lichens.
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Which is an example of osmosis?
Group of answer choices
a. oxygen moving into the bloodstream from the lungs
b. potassium ions moving in and out of an animal cell
c. carbon dioxide moving into the leaf cells of a plant
d. water moving into the root cells of a plant
Answers
Explanation:
Osmosis is about the diffusion of water in and out of cells, so the answer is D.
PLEASE HELP!
A researcher performed an analysis of the elemental composition of several fish species living in the
same body of water. The amount (in parts per million) of iron (Fe), calcium (Ca), potassium (K), sodium
(Na), and magnesium (Mg) found in each species is shown in the table.
45.10
Species Fe
Ca
K
Na
Mg
Species A 55.70 179.51 107.94 45.39
33.89
Species B 23.74 134.16 105.19
33.38
Species C 67.18 785.18 103.60 42.71
32.45
Species D 30.09 457.59 107.97 44.68
33.84
Based on this data, identify which elements are found in similar concentrations across all species of fish
tested. Explain how this data provides support for the hypothesis that all four species of fish descended
from a common ancestor.
Answers
Based on the data table on the concentration of the elements Fe, Ca, K, Na, and Mg in the different fish species:
the elements which are found in similar concentrations across all species of fish are K, Na, and Mgthis data supports the hypothesis that all four species of fish descended from a common ancestor because these three elements are found as cofactors in enzymes, thus, the four fish species have similar proteins.What is the importance of elements in living organisms?Elements are the building blocks of all living things.
Some elements are found in small amounts in the body whereas other elements are required in large quantities.
Some of the most important elements in living organisms include carbon, hydrogen, oxygen, sodium, potassium, and magnesium.
Some of the importance of elements in living organisms include:
as part of proteinsas cofactors in enzymesas part of food moleculesLearn more about elements at: https://brainly.com/question/23292423
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What color is blood while it’s in your body ?
Answers
Answer:
Red, shade of red may depend on the oxygen level in it.
Explanation:
Answer: Dark red for veins, bright red in artery
Explanation:
Carmen conducted an experiment to determine if listening to different types of music would affect a person’s pulse. Her hypothesis was that pulse rate would change with different types of music. Each person listened to seven different selections of music for 30 seconds each. Each person’s pulse was taken before the music and then after each 30-second interval of music. The pulses were taken again after the music selections were completed. Based on her experiment, Carmen concluded that a person’s pulse rate changed when the person listened to different types of music. Which component is missing from Carmen’s experiment?
Answers
Answer: control group
Explanation:
Granite comes from the Latin word called
Answers
Answer:
granum, a grain, in reference to the coarse-grained structure of such a completely crystalline rock.
Explanation:
All organic compounds contain the element
Answers
Answer:
your answer is carbon molecules
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Answer:
carbon atoms
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which element is found in DNA and protein
Answers
The element found in both DNA and protein is nitrogen.
List two ways in which bacteria are important to humans. Briefly explain these ways.
Answers
One way is that the bacteria that lives in your intestine help you digest. Ususally things in your intestine that the human body can't breaking it down along with the other food. Also meaning that that bacteria also aids in taking in nutrients.
The second way bacteria can also help you get over an illness. The bacteria in your immune system fight the bacteria that is making you sick and gets rid of it.
Hoped that helped
Why is the polarity of water molecules and hydrogen bonding essential to adhesion and cohesion?
Answers
Some properties like Polarity makes water a good solvent, cohesion helps in stick water molecule to itself while adhesion helps it to stick with other surfaces. Water have surface tension due to hydrogen bonding.
What are the difference between adhesion and cohesion ?when two similar molecule come closer adhesion occur where as in cohesion two similar molecules face the force of attraction.
Adhesion is the force of attraction observed between the water molecules and xylem vessels while Cohesion is unrestrained among water molecules.
Capillary action and meniscus are the effects of adhesion while Surface tension, meniscus and capillary action are the effects of cohesion.
The major forces responsible for adhesion are electrostatic or mechanical forces while Cohesion is the result of hydrogen bonding and Van der Waals forces.
A strong adhesion can lead to spread of liquid all over the surface while cohesion forms water droplets.
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How is the cycling of matter and energy similar?
Answers
Answer: As matter cycles and energy flows through living systems and between living systems and the physical environment, matter and energy are conserved in each change. The carbon cycle provides an example of matter cycling and energy flow in ecosystems.
Explanation:
Which are limiting nutrients for plant growing
•water and nitrogen
•nitrogen and carbon
•carbon and phosphorus
•phosphorus and nitrogen
Answers
Answer:
phoshorus and nitrogen
Explanation:
isnt 1 or 2 and i dont think its 3 so that leads me to 4
Answer: phoshorus and nitrogen is the correct answer.
Pls help me answer this as fast as possible!!!!
Answers
Answer:
1. nucleoplasm
2. wall of adjacent cell
3. golgi apparatus
4. chloroplast
5. cytoplasm
6. cell wall
7. ribosomes
8. vacuole
9. mitochondrion
Explanation:
hope this helps :)
Where and how is a star born?
Answers
Answer:
Stars are born within the clouds of dust and scattered throughout most galaxies. A familiar example of such as a dust cloud is the Orion Nebula. Turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction.
Explanation:
Answer:
Through sex and in the vagina
Explanation:
A company is building a new factory. The company wants to assure the community that the waste management process is ethical and legal. The community requested assurance that the process would be safe for both the community and the environment. Which biology-related professionals might be hired to help this company meet that goal?
Answers
Answer:c
Explanation:
The company might hire a toxicologist, an ecologist, and/or an environmental scientist to help assess the potential impact of the waste management process on the community and the environment.
Who is a toxicologist?Toxicologist is a professional who specializes in the study of the harmful effects of chemicals on living organisms and the environment. They use their knowledge of chemistry, biology, and medicine to evaluate the potential dangers of different chemicals and to develop safe handling and disposal procedures.
They may work in a variety of settings, including government agencies, research institutions, and private industry. In the context of the factory and waste management, a toxicologist could be hired to ensure that the waste produced by the factory is safe for the community and the environment, and that the disposal methods used are in compliance with relevant regulations.
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Which expression best describes the amount of biomass transferred
from the producer level of this pyramid to the tertiary consumer level? (PLEASE ANSWER CORRECTLY AND QUICK)
a > 10% (equal to)
-
b <50% (equal to)
-
c >100%
d <1%
Answers
Neutrons and____
are found in the nucleus of an atom.
your answer goes here
Answers
Answer:
protons
Explanation:
what is the function in a cell of the carbon compounds lipids
Answers
Answer:
Lipids are organic compounds that consist of carbon, hydrogen, and oxygen. They are made up of fatty acids and other compounds. They provide cells with energy, store energy, and help form cell membranes.
Carbon, hydrogen, and oxygen are the main components of lipids, which are organic molecules. Fatty acids and other substances make them up. They aid in the formation of cell membranes, supply energy to cells, and store energy.
What is function of carbon compounds lipids in cells?In a cell, lipids carry out a variety of tasks. Cells store energy as lipids termed fats for long-term use. Lipids also insulate plants and animals from their surroundings.
All cells are fundamentally made up of lipids, which also serve a variety of crucial functions.
They are essential parts of the nuclear membrane, endoplasmic reticulum, Golgi apparatus, and trafficking vesicles like endospores and lysosomes.
As well as other cellular compartments, including the plasma membrane.
Therefore, lipids have various the function in a cell as a carbon compounds.
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Why was the Battle of Yorktown such a devastating defeat for the British?
Answers
Answer:
Cornwallis had marched his army into the Virginia port town earlier that summer expecting to meet British ships sent from New York. ... Cornwallis' surrender at Yorktown effectively ended the Revolutionary War. Lacking the financial resources to raise a new army, the British government appealed to the Americans for peace
Explanation:
Answer:
The British lost an entire army.
Explanation:
i just took the test.