Around 3.8 billion years ago, near the conclusion of this phase known as the late heavy bombardment, life on Earth first emerged, hence option A is correct.
What is the origin of life?Even before the 3.5 billion years ago when the oldest fossils on Earth were discovered, just at the conclusion of the time of late intense bombardment, there is evidence of biological activity.
The 3.5 billion-year-old "stromatolites," which are hard structures created by bacteria, also provide evidence of their presence. Stromatolites are produced when microbe-made sticky mats catch and organize sediments into layers.
It has been discovered that trophozoites contain organic material from 3.5 billion years ago. 3.5 billion-year-old rocks have been found to contain microbial remnants, some of the planet's earliest evidence of life.
Therefore, 3.8 billion years ago, near the conclusion of this phase known as the late heavy bombardment, life on Earth first emerged, hence option A is correct.
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Do you label a container before or after putting a substance in the container?
Answer:
yes so you don't get confused on what the substance is
Explanation:
eg 2021!!!!!
This part of the nucleus is the "noodle soup" form of DNA.
helppp
Answer:
I think it's chromosome.
Explanation:
A chromosome looks roughly like an X, but it does not maintain it's form. IT floats around and stuff. That's why I think it's chromosome.
An organism that is convenient for the research on a particular topic is called( ) in biology
a: model organism
b: super organism
c: chosen organism
d: best organism
Answer:
A Model Organism
Explanation:
A model organism is a non-human species that is extensively studied to understand particular biological phenomena
PLEASE ONLY ANSWER IF YOU KNOW THE ANSWER!!! Will give brain and 5 stars( LOOK AT BOTH PICTURES)
Is density useful in identifying unknown substances?
Answer:
Yes
Explanation:
You can identify an unknown substance by measuring its density and comparing your result to a list of known densities.
Density = mass/volume
When you divide the mass by the volume and compare the density to a list of known densities.
how is the exact same mesosaurusfossils ended up on both the South American plate and the African plate?
Answer:
The fossils gradually drifted apart over a long period of time
Explanation:
Although a single human was not able to witness it since the earth's plates shift slowly, the fossils eventually seperated over the course of tens of millions of years.
Can some please help? I’ll give brainliest
Answer: I need the points sorry
11. One similarity between cell receptors and antibodies is that both?
1. Are specific in their actions because of shape
2. Are produced by nerve cells
3. Are involved in digestion
4. Slow the rates of chemical reactions
Answer:
joe
Explanation:
mumejejejejeejejejejejjejejeejhehehehe uh deiehhde0e irk e
Bree saw a picture of two plates spreading and wondered what formed in between the two plates. What is the name for the area between the two diverging plates in this picture?
Illustration of two plate boundaries moving in opposite direction and magma flowing upward creating a step-like indentation on top.
A. transform boundary
B. ocean trench
C. rift valley
D. subduction zone
Answer:
rift valley
Explanation:
when two plates spread apart or diverge they create a valley
The name for the area between the two diverging plates in this picture rift valley.
What is rift valley?
A system of intra-continental ridges passes through Kenya from north to south, including the Great Rift Valley.
It is a portion of the Gregory Rift, the eastern branch of the East African Rift, which extends northward into Ethiopia from where it begins in Tanzania to the south. The Arabian, Nubian, and Somalian plates' interactions resulted in the formation of the "Kenyan Dome," a geographical upwelling.
It was once thought to be a component of the "Great Rift Valley," which stretched from Syria to Madagascar. The valley's majority was once part of the Rift Valley Province.
Therefore, The name for the area between the two diverging plates in this picture rift valley.
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Why do cells need to replicate their DNA?
Answer:
Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. ... Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.
Explanation:
DNA is the genetic material, which is found in every living cell. The DNA is made up of a pentose sugar, nitrogenous base, and phosphate backbone.
DNA is a genetic material that transmits the information from parent cell to daughter cell using DNA replication.
DNA replication is an essential process in which the daughter cells inherit information from the parent cell.
Cell division is a process through which a DNA copies its genetic material and delivers it to the newly forming daughter cells.
The genetic information in the daughter cell must contain the same set of rules and instructions to carry out the vital processes. The information is present in the original copied form of DNA from the parent.
Thus, DNA replication is necessary for the continuity of life and similar genetic information presents the daughter cells.
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Based on the energy flow between trophic levels in an energy pyramid how much energy would be expected to be found at the secondary consumer level in this pyramid
Answer:
100J of energy is transferred to the secondary consumers
Explanation:
According to the second law of thermodynamics, energy transfer from one trophic level to another is not usually a 100% transfer of energy. This is because the organisms at each trophic level use energy derived from food substances to carry out its activities.
Only about 10% of the energy obtained at each trophic level is transferred to the next trophic level.
This implies that only about 1000J of energy is transferred to the primary consumers and 100J of energy is transferred to the secondary consumers.
A dam is built in a remote area to provide electricity to nearby towns.
What is an unlikely effect of the dam? help!!!
Answer: option D decreased aquatic life upstream from warmer temperatures.
Explanation:
Answer:
increased fertility of the land downstream
Explanation:
I did the test
Within a cave environment, bat waste products, called guano, are decomposed by organisms such as fungi and bacteria. These are then eaten by
creatures such as flatworms. Larger animals like salamanders eat flatworms. Which correctly represents the energy flow described?
A. Fungi - Bacteria - Salamanders - Guano
B. Bats - Guano - Flatworms - Salamanders
C. Salamanders - Fungi - Bacteria - Flatworms
D. Guano - Bacteria - Flatworms - Salamanders
Answer:
D
Explanation:
The correctly represents the energy flow described in the given case is - D. Guano - Bacteria - Flatworms - Salamanders
Energy flowEnergy flow is the movement of energy that is transferred from one trophic level to another trophic level but does not revert back. It is always unidirectional and it follows II nd law of thermodynamics.
In the given food chain, energy is transferred from waste products called guano by a bat which does not involve a bat directly, thus it starts from guano, and energy moves to bacteria and then flatworms and ultimately to the salamanders.
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A group of your classmates want to see if fertilizer improves plant growth. They set up the following experiment: They planted three different types of plant seeds in three different types of soil. They placed all the planted seeds in either a dark or a light environment. Each plant was given the same amount of fertilizer. In a complete sentence, explain whether or not you think this is a good scientific design. What are two things that you could suggest for them to change in order to improve their experiment?
Answer:
Since they are trying to test if fertilizer helps, no sunlight, they should give the plants the same amount of light. They should also give the plants different amounts of fertilizer.
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What’s metabolism?? Help meh
((SIMPLE QUESTION 15 POINTS))
A couple has 5 children. One dies after birth from a genetic disease caused by a lethal gene. The mother, the father, and 3 of the other children have this gene, but not the disease. Why don't they have the disease?
a)They only have one dominant lethal gene
b)They only have one recessive lethal gene
c)They have the same blood type
d)They have X-chromosome
Answer:
b
Explanation:
8. Fish have a bony structure called a
attached, supporting the gill structure.
to which the gill filaments are
Answer:
Each gill is supported by a gill arch – a bony structure that is oriented vertically on the side of a fish, just behind its head. The gill arch provides the support to hold a number of comb-like structures called gill filaments.
Compare the chromosomes in a skin cell to a muscle cel Include an explanation of how the two types of cells can be different
Answer:
Skin cells are the epidermal cells which all of the organs In the body by forming a tissue called skin
Explanation:
Muscle cells have many mitochondria which provide a lot of energy during contraction and relaxation of the cells.
Delta and Alpha are the same distance from the equator, and they are both near the ocean. Using the information in the map, how does the air temperature of Delta compare to the air temperature of Alpha? Why?
The image of this question is missing, so i have attached it.
Answer:
Explained below.
Explanation:
From the image attached, we can deduce that;
- The air temperature of Delta will be warmer than Alpha.
- The reason is because the wind will push ocean water that's turning and following the coasts and thereby making energy to be transferred from the ocean to the air at Delta and also from the air to the ocean at Alpha.
Answer:
I am doing the same test as you, so it is D. warmer than Alpha. The winds push ocean water that turns and follows the coasts. A lot of energy is transferred from the ocean to the air at Delta, and only a little energy is transferred from the ocean to the air at Alpha.
Explanation:
The answer is 588m^2
Answer:
ok
Explanation:
Adapting to Life at Sea: Take a look at this article from Natural History Magazine. Explain the connection between sea snake's diet, the way in which they eliminate nitrogenous waste, and their need for freshwater. Then explain why this makes life (in at least one way) difficult for them in the ocean.
Answer:
They needs fresh water for drinking purpose.
Explanation:
The Sea snakes favorite food is fish and crustaceans. These sea snakes removes nitrogenous waste in the form of ammonia. They can live in salty water but needs fresh water for drinking purpose. This makes life difficult for sea snakes in the ocean because sea snakes needs fresh water to become hydrated and the sea water is salty which they can't drink so they depends on the rainfall for drinking purpose.
The sea snakes excrete their nitrogenous wastes via cloaca and some of it from the skin.
Sea snake
The snake excretes solid as well as liquid wastes from the cloaca but sometimes the flow of excreta gets disturbed due to change in the osmolarity between the environment and the body. The oceanic water is saline which is responsible for changing the osmolarity.This is making their survival difficult in the ocean.
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Which fossil fuel puts the least amount of sulphur dioxide into the atmosphere?
a
Petroleum
b
Linoleum
C
Coal
d
Natural Gas
Answer:
b.Linoleum
Explanation:
hope that helps
Which factor does not alter the rate of hydrolysis of maltose, a disaccharide?
A.temperature of the environment of the reaction
B.pH of the environment of the reaction
C.number of enzyme molecules present
D.size of the substrate molecule
The factor that does not alter the rate hydrolysis of maltose is the number of enzyme molecules present.
Enzymes are biological catalysts that promote various reactions in the body. Enzymes are specific in their action. Therefore, only an enzyme can catalyze a particular reaction. The enzymes work based on a lock and key model.
A disaccharide is composed of two mononosaccharide units. The factor that does not alter the rate hydrolysis of maltose is the number of enzyme molecules present.
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Which compound has the highest fuel value ? Why?
Answer:
Hydrogen gas has the highest calorific value of 150 KJ/g among all the fuels. So, hydrogen gas is considered to be an extremely good fuel.
Explanation:
Answer:
Hydrogen has the highest fuel value. I hope I helped
13. Which statement is true about the process of mitosis? *
A. The process occurs only in plants.
B. The process occurs only in animals.
C. The process occurs in every type of organism.
D. The process occurs only in multicellular organisms.
The statement 'the process occurs only in multicellular organisms' is TRUE about the process of mitosis (Option D).
Mitosis is a cell division by which a cell produces two genetically identical daughter cells.Conversely, meiosis produces four cells having half the genetic material.Mitosis produces somatic (body) cells in multicellular organisms, whereas meiosis produces germinal cells.In conclusion, the statement 'the process occurs only in multicellular organisms' is TRUE about the process of mitosis (Option D).
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All planets rotate counterclockwise except one. Which planet rotates clockwise?
Mars
Venus
Earth
Mercury
Answer:
venus is the only planet that relates opposite to the direction of all other planets
Find the slope between (-4,5) and (1, -15). Reduce it
show work
Answer:
m = - 4
Explanation:
[tex]\frac{-15-5}{1+4}=\frac{-20}{5}=\boxed{-4}[/tex]
Hope this helps.
I need an example of dehydration synthesis
Answer:
Polymerization reactions
Explanation:
monomer units condense together to form polymers.
If homeostasis is not maintained, what will most likely happen to the digestive system?
A book on a table has _______ potential energy than a book on a chair because the table is ________ off the ground.
Answer:
A book on a table has more potential energy than a book on a chair because the table is higher off the ground.
Explanation:
Feel free to correct me If i'm wrong :)
Answer:
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