Answer:
Acid slant: yellow, fermentation of glucose and lactose and/or sucrose. High concentration creates excessive acid formation
Alkaline slant: red, limited glucose in the medium and limited acid formation.
The pH of acids is less than 7. Alkalis have a pH more than 7 The pH of neutral substances is 7. If metal oxides are soluble in water, they are alkaline. Non-metal oxides are acidic, if soluble in water.
What are acids?An acid is a molecule or ion that can either donate a proton (Bronsted-Lowry acid) or form a covalent bond with an electron pair (Lewis acid). The proton donors, also known as Bronsted-Lowry acids, are the first type of acid.
Only dextrose fermentation produces an alkaline/acid (red slant/yellow butt) reaction.
The fermentation of dextrose, lactose, and/or sucrose is indicated by an acid/acid (yellow slant/yellow butt) reaction.
An alkaline/alkaline reaction occurs when as a result, carbohydrate fermentation does not occur.
The presence of red (alkaline) in the slant and butt indicates that the organism being tested is a nonfermenter.
The formation of hydrogen sulfide results in a black precipitate in the butt of the tube. The splitting and cracking of the medium indicates gas production.
Thus, these are the basic difference between acid and alkaline slant.
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which is more common grass or humans?
Answer:
Grass
Explanation:
Cause most human food comes from grasses, directly as grain or indirectly as feed for meat and dairy producing animals.
people- estimate that humans have modified >50% of Earth's land surface.
The grass family, Poaceae, is one of the largest plant families, and, to humans, perhaps the most important, as it includes agricultural grains such as wheat, rice, maize (corn), and sugar cane. The Poaceae comprise about 600 genera and perhaps ten thousand species. It is estimated that grasslands cover about 20 percent of the earth's land area.
so the answer is humans
As a student how can you uphold the Sustainable Development Goals amidst the current environmental situation our country is facing?
How does pre existing genetic factors and environmental factors both affect your chances to get cancer
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The endocrine system is linked to the nervous system because many of the chemicals are produced or regulated by the __________.
a. brain
B. tongue
c. nose
No dam links
Answer:
a.Brain
Explanation:
Hypothalamus: The hypothalamus is in the lower central part of the brain. It links the endocrine system and nervous system. Nerve cells in the hypothalamus make chemicals that control the release of hormones secreted from the pituitary gland.
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warm front
// answer was short so added this text //
Answer:
choice: D (Warm font)
Explanation:
What type of reaction does catalase facilitate- synthesis or decomposition? Why?
Catalase is a common enzyme found in nearly all living organisms exposed to oxygen (such as bacteria, plants, and animals) which catalyzes the decomposition of hydrogen peroxide to water and oxygen.
Catalase is a common enzyme found in nearly all living organisms exposed to oxygen (such as bacteria, plants, and animals) which catalyzes the decomposition of hydrogen peroxide to water and oxygen.
What is catalase?
An enzyme called catalase causes (catalyzes) the process by which hydrogen peroxide is broken down into water and oxygen.
Catalase, which is widely distributed in organisms that live in the presence of oxygen, inhibits the buildup of peroxide, which is continuously created by multiple metabolic reactions, and shields cellular organelles and tissues from harm. Catalase is primarily found in the liver of mammals.
Numerous industrial uses exist for catalase. It is used with other enzymes in the food industry to preserve foods, make particular dishes and beverages, and preserve foodstuffs.
Therefore, Catalase is a common enzyme found in nearly all living organisms exposed to oxygen (such as bacteria, plants, and animals) which catalyzes the decomposition of hydrogen peroxide to water and oxygen.
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A transcriptional repressor that controls the transcription of gene A is not normally active unless bound by an effector molecule X. In a certain cell, the domain of the repressor that binds to the silencer of gene A is mutated so that the repressor-X complex can no longer bind to its recognition site. With all other factors being the same, what effect do you predict on the transcription of gene A if X is increased in the cell and the cell is already expressing gene A
Answer:
Transcription of gene A is not affected
Explanation:
A transcriptional repressor is a DNA/RNA-binding protein that acts to suppress gene expression and/or protein synthesis by binding to target sequences. Moreover, a silencer is a DNA region that binds to particular transcriptional repressors in order to suppress gene expression. In this case, the transcriptional repressor is activated by binding to an effector molecule X (e.g., another protein). In consequence, and since the activated repressor-X complex is not more able to bind the silencer of gene A, it is expected that such complex will not be able to affect transcription of the target gene.
Which of the following would make the best index fossil?
a. An insect that only existed in one small forest for abolit 100 million years
b. An aquatic animal that existed all over the world for about 15 million years
C. A single-celled organism that lived in a widespread region for about 25 million years
d. A plant species that lived in a specific geographic region for about 5 million years
Answer: I would go with B. Here’s why: An index fossil is usually easily recognizable, and underwent a wide geographic distribution. What leads me to believe B is the correct answer, is because it’s something that existed “ all over the world”.
In the diagram below, which flower part will
become a seed?
Structure A
Structure D
Structure B
Structure C
Human activities have resulted in changes to the atmosphere. true or false
which of the following best describes how the Sun creates wind on Earth
The energy of the sun heats the land unevenly, creating wind.
What is Earth?Earth, the third planet from the Sun, is the planet where all known life is found. Although the Solar System contains enormous amounts of water, only Earth is home to liquid surface water.
The ocean covers roughly 70.8% of Earth's surface, dwarfing the polar ice, lakes, and rivers. Earth's surface is made up of continents and islands for the remaining 29.2% of its total area.
Several slowly moving tectonic plates that make up the Earth's surface combine to create mountain ranges, volcanoes, and earthquakes. The magnetic field that forms the Earth's magnetosphere and diverts harmful solar winds is produced by the liquid outer core of the planet.
Therefore, The energy of the sun heats the land unevenly, creating wind.
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Please select the word from the list that best fits the definition
The movement of a substance through the cell membrane that requires energy.
Answer:
The correct answer is - active transport.
Explanation:
Active transport is the movement of a substance that crosses the cell membrane against the concentration gradient and therefore requires energy in the form of ATP. In contrast, passive transport does not require energy for the movement of a substance through the cell membrane as it moves to the concentration gradient.
This movement of molecules is towards the region of high concentration from the region of lower concentration through the cell membrane by elcectrochemical gradient or ATP.
Describe what happened to the colored water and the pieces of paper after the holes were punched in the material covering the beaker
Answer:
The paper spreads over the surface of water and the colored water sunk to the bottom.
Explanation:
The paper hole punches were spread over the surface of the water in the large beaker due to lower density of paper as compared to water whereas the colored water had sunk to the bottom. Convection currents is the driving force that caused the pieces of paper to move over the water's surface. At the surface, the water cools and becomes more denser so the coloring sank toward the bottom of the beaker creating convection currents that will leads to the presence of paper on the surface of water.
Which of the following would be the optimal time for a grower to plan passive freeze protection for an orchard?
A) at planting time
B) prior to a cold snap
C) prior to planting
D) at grafting time
[tex] \\ [/tex]
A) at planting time
[tex] \sf \: a) \: \boxed{ \underline{\bf \: \: at \: planting \: time}} \: \sf is \: the \: answer.[/tex]
Which of the following is true of pseudoscience and science?
A) Pseudoscience is testable and science is not testable
B) Pseudoscience cannot be tested and science is testable
C) Pseudoscience and science both use a lot of empirical evidence
D) Pseudoscience is based on facts and science is just opinion
Answer:
B
Explanation:
Pseudoscience is just based off of what people think happens
Answer:
C: Pseudoscience and science both use a lot of empirical evidence
Explanation:
Why do you think some organisms have only one cell, but humans have about 100 trillion?
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Cerebellum is a region of a brain that controls the body temperature
True or false
In the carbon cycle, carbon from the nonliving environment becomes a
part of living organisms through
A. photosynthesis.
B. cellular respiration.
C. transpiration
D. absorption
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A. Photosynthesis
thankshope it helpshow would a large increase in the salinity of an estuary most likely affect the ecosystem of an estuary
Answer:
it would most likely kill a bunch of the animals and plants that live there
Explanation:
1
1. The products in the chemical equation of photosynthesis is glucose and oxygen.
1
True
O False
answer
False
Explanation
The reactant for photosynthesis are light energy ,water , carbon dioxide and chlorophyll and the products are glucose,oxygen and water
Explain why all types of evidence can be useful in court.
Answer:
Well
Explanation:
Because, it'll bring them closer into solving the case.
What Kind of Mutation is demonstrated?
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The nervous and endocrine systems both use a form of communication; the nervous system sends electrical messages and the endocrine system sends chemicals known as __________.
a. antibodies
B. hormones
C. enzymes
No dam links
.
Answer:
The answer is B.Hormones
The glands that make up the endocrine system produce chemical messengers called hormones that travel through the blood to other parts of the body.
Geothermal electricity-generating plants produce
Your answer:
ash.
methane.
O carbon dioxide.
no excess heat.
no greenhouse gases.
Answer:
3/C. carbon dioxide
Explanation:
HELP!!! Im doing an honors assignment for science class on space weather! I dont need you to do it I just need someone to help me understand it!
here are the instructions:
Advanced Space Weather Activity
This lesson highlighted different types of space weather. If you were responsible for reporting space weather like Earth's weather is reported, how would you do it? What would you include?
Create any type of weather report to warn people about space weather activity. You can present it like a weather app, radio announcement, television news report, or newspaper weather section. You only need to pick one type of report to submit to your instructor.
They gave an example below however im confused if I should copy it and put my own words or if I should just make like a video or something!
please help me :(
Answer:
If I was responsible for earth weather, I would do this:
People watch TV every day. No? Well. some do! I would create something better than amber alerts, something better than the news on TV. I would put earth's loudest megaphones in every single state. One in every city. About 670,000,000,000 in total! It would tell people all around the world what the news up in space is ! For backup, I would also use a weather app but for space. People are on their phones everyday. Lets make it useful! The space weather app would tell people everyday what the weather is up in space, making them interested in space weather! For instance, Over at Mars, its currently 35° degrees! Many people are interested in space, let them know the weather of their favorite planets ! Make a channel on TV ! Hope this helps <3
1)What is the importance of conjugation?
2)How do fungi obtain nutrients?
3)Which one is not a charactersitic of all animals?
Answer:
evolution of bacterial genomes.
Explanation:
Conjugation plays an important role in evolution of evolution of bacterial genomes.Human pathogenic bacteria may have acquired many of the virulent traits, as well as antibiotic resistance by conjugation.
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How does a large mass star undergo a supernova?
What are some featured species in the deep sea?
What is so fascinating about our deep blue sea is the fact that there could be so many more species than the ones we know about. Our oceans are so vast and deep anything could really be down there. I don't exactly know what you mean by this question but I can give you some deep-sea creatures that have been discovered, although some sound equivalent to science fiction, they are in fact real.
- Giant Isopod: they are a species of aquatic crustacean. Their appearance is that of a much larger bug, similar to those "rolly polly" bugs. They reside in the deep sea scuttling along the seabed and ultimately harmless to humans.
- Vampire Squid: This creature looks similar to many other squids such as their squid-like bodies and tentacles, however, what makes this squid unique is its black webbed skin (resembling a vampire cape) and its red eyes. The vampire squid's body is covered in photophores that produce light to attract prey.
- Frilled Shark: This is an odd-looking shark that lurks in the deep sea. It looks almost pre-historic and can grow up to a length of 7ft with a typical shark fin further down its back as well as the well-known rows of sharp teeth. Its gills appear to be frilled hence its name.
- Anglerfish: These deep-sea creatures are pretty commonly known. They are frightening-looking fish with long thin teeth lining their mouth and the notable luminescent fin ray that it uses to lure other fish to eat.
So these were just some notable deep-sea creatures that I have heard of and I wrote some information about them. Hope this helped :)
use mathematical representation to predict motion of objects in the solar system -
Explanation:
Kepler's laws describe common features of the motions of orbiting objects, including their elliptical paths around the sun. ... Use mathematical and computational representations of Newtonian gravitational laws governing orbital motion that apply to moons and human-made satellites.
Clarification Statement: Emphasis is on Newtonian gravitational laws governing orbital motions, which apply to human-made satellites as well as planets and moons.
Assessment Boundary: Mathematical representations for the gravitational attraction of bodies and Kepler’s Laws of orbital motions should not deal with more than two bodies, nor involve calculus.
The overall efficiency of oxidative phosphorylation, assuming standard conditions, can be calculated by comparing the free energy potentially available from the oxidation of NADH by O2 to the free energy required to synthesize 2.5 ATP from 2.5 ADP. This comparison reveals an efficiency of 35%, which is based on the experimental measurement of 2.5 ATP for every NADH oxidized during oxidative phosphorylation. Using this efficiency, calculate the number of ATP generated by each of the following Complexes:
Answer:
The number of ATPs produced wheh efficiency is 100% is 71.42 ATP.
Explanation:
It is known that at the end of Kreb's cycle 10 NADH are produced
Now by using the unitary method
1 NADH produces=2.5 ATP
10 NADH produces=2.5 ATP x 10
10 NADH produces=25 ATP
This is for the efficiency of 35%.
35% efficiency produces ATPS=25
1% efficiency produced ATP=[tex]\dfrac{25}{35}[/tex]
100% efficiency produced ATP=[tex]\dfrac{25}{35}\times 100[/tex]
100% efficiency produced ATP=71.42 ATP
The number of ATPs produced wheh efficiency is 100% is 71.42 ATP.