Answer:
Decreases
Explanation:
Enzymes speed up chemical reactions so the product is made in less time
Which fossils provide information as to the mode of formation of an oxygen-rich atmosphere by about 2 billion years ago?
Answer:
The fossils that provide information on the formation of an oxygen-rich atmosphere are the stromatilites from the Precambrian era. These are layered and columnar fossils consisting mainly of cyanobacteria which were the original life form back then. These bacteria took in carbon dioxide and produced oxygen by photosynthesis as early as 2.5 billion years ago (the earth is about 4.5 billion yrs old).
Explanation:
can somebody do 4 and 5 for me
Answer:
4. According to what is observed in the diagram, the maltose (substrate) binds to the maltase (enzyme) to obtain glucose molecules (product), in a process of hydrolysis of the maltose.
5. Three factors that can affect intestinal maltose activity - slowing it down or stopping it - are temperature, pH and substrate depletion.
Explanation:
4. Enzymes, such as maltase, have the function of making a reaction faster and decreasing the activation energy. Maltase is responsible for breaking down a maltose molecule, a dimer, into two glucose monomers, which is a hydrolysis reaction of the bonds that hold glucose molecules together.
5. There are several factors that can cause the decrease or cessation of the activity of an enzyme. Enzymes are activated when substrate is available and work best under ideal temperature and pH conditions. When there are alterations of these factors, the enzyme will reduce or stop the reaction in which it intervenes.
pH: when the pH increases or decreases it produces a decrease in the speed of reaction that catalyzes an enzyme. Very high or low pH levels can denature the enzyme and make the expected reaction not occur. Temperature: like pH, changes in temperature can slow or stop maltase activity. Substrate availability: It is a fact that when the specific substrate of an enzyme becomes depleted, the rate of reaction slows down, stopping when no substrate is available.Explain one way the water cyce affects weather.
Answer:Consequently, the temperature will fall. Rainfall and snow are results of water cycle and can lead to severe weather conditions. Excessive rainfall due to water cycle can cause floods. Extremely low rainfall, lack of adequate water sources can lead to draught in a given region.
Explanation:
PLEASE HELP ME WITH THIS QUESTION
A depiction of the MAPK/ERK signaling pathway that leads to cell growth is shown in the image.
What would be observed if a carcinogenic compound in coal tar activated step 3 of the pathway, even in the absence of the signaling molecule?
A) The transduction molecules in step 5 would always be active.
B) Step 2, the step linking the receptor to transduction, would always be active.
C) Step 4, a transduction step, would be prevented from activating the target protein.
D) The transcription factor in step 6 would be prevented from transcribing the target genes.
Answer:
a
Explanation:
I am pretty sure its a
please help me with this question:)
Answer:
all cells so the last one
a metacentric chromosome is one that has a centrally located centomere and chromosome arms with approximately equal length. which of the human chromosomesare metacentric
Answer:
Human chromosomes 1 and 3
Explanation:
There are four types of chromosomes classified based on the position of their centromere. These chromosomes are metacentric, submetacentric, acrocentric and telocentric. As rightly stated in this question, metacentric chromosome is the chromosome that has a centrally located centomere making the chromosome arms to be approximately of equal length.
The metacentric type of chromosomes are present in humans as viewed using KARYOTYPE (a pictorial display of chromosome arrangement). Based on karyotyping, chromosomes 1 and 3 are METACENTRIC.
I need help can someone help me please?
Answer:
The answer is A
Explanation:
Which organelle makes energy for the animal cell?
A. mitochondria
B. chloroplasts
C. chromatin
D. golgi apparatus
Answer:
A. mitochondria
Explanation:
The mitochondria makes energy for the animal cell. The mitochondria organelle is known as the "power house of all cells". It makes energy for the cell.
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Which two pieces of equipment did the geologist most likely use to determine the density of the copper nuggets?
Which is greater 1,000 ml or 1,000 cm?
Answer:
Neither, they are equal.
1,000 cm3 = 1000 mL
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Answer:
direct observation
Explanation:
One of the key elements in creating a green economy is the construction of ________________.
a.
green buildings
c.
solar panels
b.
a new tax system
d.
a new workforce
Answer:
A One of the key elements in creating a green economy is the construction of green buildings.
Explanation:
Any economy relies on businesses and buildings, so a green economy is going to need green buildings to support a green economy as well.
Which statements best describe shared characteristics? Select two options.
A. Shared characteristics always exist in the common ancestor and in the modern organism.
B. Shared characteristics never exist in the common ancestor or in the modern organism.
C. The more characteristics organisms share, the more closely related they are.
D. The fewer characteristics organisms share, the more closely related they are.
E. Shared characteristics can exist among organisms that belong to different species. F. Shared characteristics only exist among organisms that belong to the same species.
Answer:
The more characteristics organisms share, the more closely related they are.
Shared characteristics can exist among organisms that belong to different species
Explanation:
A shared character can be regarded as a character that is shared by two lineages.
The statements that best describe shared characteristics
The more characteristics organisms share, the more closely related they are.Shared characteristics can exist among organisms that belong to different species.The classification of all living entities is based on extremely basic, universal traits.
Each group's organisms are subsequently subdivided into smaller groupings.
Each bigger group is divided into smaller groups based on more detailed similar shared characteristics.
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How can we conserve energy and instead of wasting energy?
Answer:
Adjust your day-to-day behaviors.
Replace your light bulbs.
Use smart power strips.
Install a programmable or smart thermostat.
Purchase energy efficient appliances.
how animals in the taiga have adapted to survive the extreme cold of winter.
I
Answer:
Some animals have adapted to life in the taiga by hibernating when temperatures drop. Other animals have adapted to the extreme cold temperatures by producing a layer of insulating feathers or fur to protect them from the cold. In some instances, the adaptation of a seasonal change in color of feathers or fur protects the animal from its predators.
Answer:
Some animals have adapted to life in the taiga by hibernating when temperatures drop. Other animals have adapted to the extreme cold temperatures by producing a layer of insulating feathers or fur to protect them from the cold. In some instances, the adaptation of a seasonal change in color of feathers or fur protects the animal from its predators.
Explanation:
4. Which part of the plant do we eat:
a. Cucumber:
b. Olive:
C. Broccoli:
d. Lettuce:
the diagram below is a model that shows structural organization within a multicellular organisms. why is "tissue" listed between cell and organ?
What is the optimal pH for Enzyme B?
Answer:
6,7.77.0
Please correct Ok ?
Conservation of mass the mass of a whole object
Answer:
Explore the Law of Conservation of Mass by demonstrating that the mass of a whole object is always the same as the sum of the masses of its parts. All objects and substances in the world are made of matter. ... Matter has two fundamental properties: matter takes up space and matter has mass.
Explanation:
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where are excessive ketones normally seen in a test?
1. blood
2. urine
3. saliva
What effect does development, through erecting buildings and concrete pavement, have on the recharge of aquifers and the quality of the water?
Answer:
Infiltrate rate decreases and also water quality.
Explanation:
There is adverse effect of erecting buildings and concrete pavement on the recharge of aquifers and the quality of the water because the water is unable to infiltrate inside the soil due to concrete floor and the recharging of aquifers is not possible. These buildings and concrete pavements also reduces the quality of water due to degradation of sediments present in the building with the passage of time.
Describe the role of a nebula in the life cycle of a star. Please use your own words
Answer:Stars are formed in clouds of gas and dust, known as nebulae. Nuclear reactions at the centre (or core) of stars provides enough energy to make them shine brightly for many years. The exact lifetime of a star depends very much on its size.
A star can be defined as a giant celestial (astronomical) object that is made up of a luminous sphere of plasma bounded together by its own gravitational force.
Generally, a star consists of two (2) main interstellar hot gas and these are:
I. Hydrogen (H).
II. Helium (He).
Some of the examples of a star are;
Sun (the closest to planet Earth). Antares. Canopus. Vega. Betelgeus.
A nebula simply refers to a low-density cloud of interstellar hot gas (hydrogen and helium) and dust.
Basically, a nebula is needed for the creation or formation of a star.
Hence, the role of a nebula in the life cycle of a star include the following:
Stage 1: The temperature increases in the center of a nebula, thereby, causing the small nuclei of atoms to fuse.
Stage 2: The nebula gets hotter and brighter as the nuclear fusion sets off a chain reaction while providing enough energy to turn the nebula into a star.
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Red blood cells are able to maintain homeostasis because they are bathed in blood, which is to the fluid in the cells themselves.
Answer:
this is not a question it is a statement
Explanation:
Difference between "Releasing" and "Inhibiting" hormones?
2. Running water can be used as an energy
source to produce _____
power.
running water can be used as an energy source to produce hydroelectric power.
What would be the best control group for global warming? Select one: (A)laboratory simulation,(B )a computer simulation or (C) another identical earth that has not seen increases in greenhouse gases (even though this is not possible)
Answer:
C. another identical earth that has not seen increases in greenhouse gases
The best control group for global warming would be another identical earth that has not seen increases in greenhouse gases.
What do you mean by Global warming?Global warming may be defined as the gradual increase in the Earth's average temperature due to the trapping of greenhouse gases by the atmosphere.
The excessive release of greenhouse gases like methane, Carbon dioxide, nitrous oxide, and ozone are responsible for global warming. These gases are released by automobiles, industrial smoke, etc.
Deforestation is also considered the cause of global warming. Trees help in the reduction of carbon dioxide from the atmosphere and convert it into oxygen.
Therefore, the best control group for global warming would be another identical earth that has not seen increases in greenhouse gases.
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What is exocytosis?
The process by which a cell engulfs a large particle or another cell, eating it
Pressure that a fluid exerts against a structure that contains it
The process by which a cell takes in a small amount of extracellular fluid and its contents by the ballooning inward of the plasma membrane
The process by which a cell expels the contents of an internal vesicle to the extracellular fluid
if a nutrient were in short supply in an ecosystem, how might it effect an organism
Answer:
Its leads to a deficiency
Explanation:
If a nutrient is in short supply in an ecosystem, it will lead to a deficiency of such nutrient in organisms that are in need of the nutrient.
Such a deficiency can lead to diseases in the ecosystem. If organisms that requires the nutrient cannot find an alternative, it will seriously affect their well being. Such deficiency often lead to very dire consequences for the balance of the ecosystem at large.In facilitated diffusion, do molecules move down their concentration gradient? Explain.
Answer:
Molecules move up the concentration gradient in facilitated diffusion, which requires ATP to be used as molecules naturally move from high to low concentration
Explanation:
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Molecules move down their concentration gradient in facilitated diffusion through channels of proteins.
For most molecules, movement through the membrane, with a significant rate, is only possible by the presence of transporter proteins (integral membrane proteins, which recognize substances with a high specificity, accelerating their translocation) or channels of proteins.
Transport proteins allow the facilitated diffusion of molecules, moving them along the free energy gradient (concentration gradient, charge gradient, or both), in the direction of thermodynamic equilibrium.
When a carrier protein binds to a solute, the protein changes shape in such a way that it carries the solute to the other side of the membrane.
Facilitated diffusion is similar to simple diffusion, since the molecules move from a region of higher to a lower concentration of solutes.
For example, by facilitated diffusion, chlorine ions move down their concentration gradient into the cell through chlorine channels.
Therefore, we can conclude that many molecules are assisted by transporter proteins for their diffusion through the plasma membrane, a process known as facilitated diffusion, where the molecules descend through their concentration gradient.
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