In the test tube pink colour shows that it is indole positive and H2S positive bacteria and it is non motile.
What is the indole positive?Within seconds of introducing the reagent, a pink color appears in the reagent layer on top of the agar deep, indicating a positive indole test. The reagent layer will stay yellow or slightly hazy if the culture is indole negative.
When an organism converts sulfur to hydrogen sulfide, the hydrogen sulfide reacts with iron to generate ferric sulfide, a black precipitate. The presence of blackening in the medium suggests a reduction in sulfur, which is a +ve sign.
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What is the branch of biology that investigates cells called?.
Answer:
The branch of biology that studies the cell and its process in detail is called cellular biology or cytology
Explanation:
This includes studying their structure, functions, and biochemical processes.
The branch of biology that investigates cells is called cell biology.
What is cell?Cell is the smallest unit in biology that can sustain life on its own and makes up all living things as well as the body's tissues.
The cell membrane, the nucleus, and the cytoplasm are the three primary components of a cell. The substances that enter and leave the cell are governed by the cell membrane, which encloses the cell.
The study of cell structure and function is known as cell biology, and it is based on the idea that a cell is the basic building block of all life.
A thorough grasp of the tissues and organisms that cells make up is made possible by concentrating on the cell.
Thus, cell biology is the branch that investigates cells and its structure and functioning.
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What keeps sunlight and heated air way from a building
A) passive solar cooling
B) passive solar energy
C) passive solar heating
Answer:A) passive solar cooling
Hope this helps
What would happen to plants if they were deprived of sunlight?.
Plants that are sunlight deprived can lose their colour and die, this means that photosynthesis can't take place either.
If you placed blood tissue in a hierarchy pyramid, what hierarchical levels would go directly above and
below it?
O
Above: cardiovascular system
Below: heart
Above: heart
Below: organ system
Above: heart
Below: red blood cells
Above: cardiovascular system
Below: red blood cells
If you were to place blood tissue in a hierarchical pyramid, the hierarchical levels would be directly Above: cardiovascular system, Below: heart
What is the cardiovascular system?The cardiovascular system is made up of the heart and blood vessels. The heart works like a pump, allowing blood to be pumped. Arteries are blood vessels that carry blood from the heart to the body. Veins are blood vessels that ensure the return of blood to the heart.
With this information, we can conclude that if you were to place blood tissue in a hierarchical pyramid, the hierarchical levels would be directly Above: cardiovascular system, Below: heart
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6. What are four main principles to the theory of natural selection?
Answer:
variation, inheritance, selection and time
Which form of pollution causes acid lakes and rivers?
Answer:
air pollution
Explanation:
Photosynthesis is a major metabolic reaction on planet earth. Explain the following for photosynthesis: Its function (in biology function means what something does) Its location (where in the cell does it take place) The reactants (what goes into the reaction) The products (what comes out of the reaction)
Which one a b c or d.
Answer:
The answer is A. They show as the genetic makeup of extinct organisms.
Biochemical Evidence-definition
Answer:
is based on the fact that certain enzymes and chemical processes are found in the cells of all or nearly all life on Earth.
Select the correct location on the image.
An ecosystem had reached its carrying capacity for hyenas. Then, a sudden drought in the region caused many of the hyenas to die. The
population of hyenas eventually recovered, once again reaching carrying capacity. Which graph represents the change in the hyena populatic
over time?
YA
Population
Time
Answer:
B
Explanation:
Top right
high temperature from too much heat of the sun could be experienced during ______ seaseon
Answer:
Summer
Explanation:
Since summer months are usually more hot, the temperature is higher. This can have many effects on people. For example, if your body temperature rises to 104 C or higher it causes heatstroke.
Scientists were studying the DNA from Antarctic fish, including two species of icefish, that have no hemoglobin in their blood. They constructed the following cladogram.
What can be interpreted from this cladogram?
Select all that apply.
A.The most closely related species to the hemoglobinless icefish is C. mawsoni.
B. The C. anarcticus is more closely related to C. mawsoni than it is to the other hemoglobinless icefish.
C. N. corliceps is the closest relative to the hemoglobinless icefish from the fish that were studied.
D. The two species of hemoglobinless icefish are more closely related to each other than they are to other Antarctic fish studied.
What can be interpreted from this cladogram is that the two hemoglobin-free icefish species are more closely related to each other than to other Antarctic fish studied.
What is cladogram example?The cladogram is an important graphic tool used in phylogenetic studies, and represents the evolutionary relationships between different groups of organisms, such as
fishmammalsreptiles and birds.With this information, we can conclude that what can be interpreted from this cladogram is that the two hemoglobin-free icefish species are more closely related to each other than to other Antarctic fish studied.
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1. In which part of an organism's range will competition for resources be most intense and why?
Answer:
The preferred optimum range because it's the best place for survival.
please mark me brainliest :)
Whose cell does not have a cell wall ? a) human b) algae c) plants d ) bacteria
with explanation .
Human
animals always move, they are not static in one particular place, therefore they need to be flexible. Therefore additional layer i.e cell wall is not required
Cyanobacteria are photosynthetic marine organisms. why would these organisms likely be found only in shallow ocean zones? the current in deeper ocean zones is too traumatic. the amount of oxygen in deeper ocean zones is too high. the amount of light in deeper ocean zones is too dim. the amount of pressure in deeper ocean zones is too low.
Cyanobacteria as photosynthetic organisms would likely be found only in shallow ocean zones because the amount of light in deeper ocean zones is too dim.
What are cyanobacteria?Cyanobacteria are any of the very many photosynthetic prokaryotic microorganisms, of phylum Cyanobacteria, once known as blue-green algae.
Cyanobacteria are photosynthetic organisms, hence, require sunlight energy to undergo the process.
Light from the sun can only reach the photic zone of a water body, hence, cyanobacteria as photosynthetic organisms would likely be found only in shallow ocean zones because the amount of light in deeper ocean zones is too dim.
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Answer:
The amount of light in deeper ocean zones is too dim.
Explanation:
Not: the amount of oxygen in deeper ocean zones is too high, because their is barely any oxygen in deep ocean. Not:
The current in deeper ocean zones is too traumatic, it is very still, no currents.
The amount of pressure in deeper ocean zones is too low, there is high pressure deep ocean, like for example, when you go deeper in water your ears get filled, like you can't hear because of the high pressure.
So the answer is; The amount of light in deeper ocean zones is too dim.
Also I did take the test and got it right.
help please!!!
BIOLOGY
Cell theory will not ever become the law of cells because cells undergo changes as mutations occur within them, and developing anything beyond cell theory would be impractical.
What do you mean by Cell theory?Cell theory may be defined as a theory given by M.J. Schleiden and T Schwann which states that all living organisms are made up of cells which are the smallest unit of all living entities.
It is only due to mutations, cell changes its identity and properties randomly. Hence, it seems very tough for scientists to analyze all the mutations in the cell.
Therefore, cell theory will not ever become the law of cells because cells undergo changes as mutations occur within them, and developing anything beyond cell theory would be impractical.
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daphnia longicephala is a freshwater crustacean that can detect
Answer: It can detect chemical cues produced by the predator Notonecta glauca.
Explanation:
Two sisters are born from a father who has blue eyes and a mother who has brown eyes. One sister has blue eyes, and the other has brown eyes. Which of the following explains this difference in eye color? A Each sister inherited a different combination of alleles from their parents that determined their eye color. B One of the sisters inherited all of her alleles from the mother, and the other sister inherited only from the father. C The environment caused the alleles to be expressed in different ways, making the sisters' eye colors different. D The sister with the blue eyes had only one allele for determining eye color, and the sister with brown eyes had two.
Answer:
A)Each sister inherited a different combination of alleles from their parents that determined their eye color.
Explanation:
-
-
-
-
-
-
Answer:
A.
Explanation:
A because they both inherited a different combination of alleles from their parents that determined their eye color.
Why is hair follicle and hair shaft important ?
Answer:
A hair follicle anchors each hair into the skin. The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft. Blood vessels nourish the cells in the hair bulb, and deliver hormones that modify hair growth and structure at different times of life.
Explanation:
2) For each of the following write whether it is homozygous dominantheterozygous or homozygous recessive AA TT
Which of the following is defined as a system in the food production process that falls outside of pre-
determined regulators?
O non-conforming
out of control
O unregulated
O out of compliance
Explanation:
non-conforming
out of control
DO 6. Choose the best answer.
The global swapping of people, ideas, technology, and goods was
the Columbian Exchange
O mercantilism
Humanism
feudalism
Answer:
Columbian Exchange
Explanation:
I looked up definitions and information on all the option words, Columbian Exchange seems to be a fit for the answer.
A major difference between scientific explanations and commonsense explanations is that scientific explanations are
Answer:
scientific explanations are descriptions that are tested, observed, and backed up with evidence for realities in the natural world.
Any change in a sequence of DNA is ...
A. a mutation.
B. mitosis.
C. a virus.
Answer:
A. Mutation
Explanation:
A change in the sequence of DNA would be best classified as a mutation. Mitosis refers to the reproduction of cells, and a virus is a foreign body that infects cells.
Answer:
A. Mutation
Explanation:
when you change DNA it causes mutations because they have been ruptured and many things could go wrong in your body, so stay away from x-rays and such because that can cause one. :)
How can optical illusions be best described?
question 2 options:
something that alters the laws of space and time.
something that allows your 3rd eye to see in the 4th dimension.
something that deceives the eye (and brain) by appearing to be other than it is.
something that changes the cones and rods in your eyes.
Optical illusions be best described as: (C). something that deceives the eye (and brain) by appearing to be other than it is.
Meaning of optical IllusionOptical illusion is a visual effect created by a visual system that tends to deceive the brain and the eyes, by making them interpret its appearance different from what it really is.
Optical illusion tends to seem as though its moving but its just still. The interprets the signal from the eyes wrongly.
In conclusion, Optical illusions be best described as: something that deceives the eye (and brain) by appearing to be other than it is.
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6. (a) What two major changes have occurred in the North Fork Toutle River?
A massive landslide Mud flows in the Toutle river.
How changes have occurred in the North Fork Toutle River?There had been many earthquakes in the area prior to eruption but this happen to be a massive land slide because a moving magma have over steepened the mountain slopes.
This geologic process uses gravity to cause rock, soil, artificial fill or a combination of the three to move down a slope. Slow weathering of rocks as well as soil eruption and volcanic activity also causes landslides
Thus, massive landslide Mud flows in the Toutle river.
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could someone help mee?
Answer:
I think the are saying add up the traits
Answer:
Where the arrow is pointing is where the nutrients are going. For example, the nutrients from the bird go to the fungi.
Explanation:
If you were to observe the activity of methylated dna, you would expect it to _____.
If you observe the activity of methylated DNA, you would expect the change in the activity of DNA molecule.
What is the activity of methylated DNA?DNA methylation is a process by which methyl is added to the DNA molecule which can change the activity of a DNA without changing the sequence. When it is located in a gene promoter, DNA methylation acts to repress gene transcription.
So we can conclude that If you observe the activity of methylated DNA, you would expect the change in the activity of DNA molecule.
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If you took a cross-section of soil from your backyard, what would be the correct order of soil layers from top to bottom?
bedrock, parent rock, subsoil, topsoil, organic
bedrock, subsoil, parent rock, organic, topsoil
topsoil, organic, subsoil, bedrock, parent rock
organic, topsoil, subsoil, parent rock, bedrock
topsoil, organic, subsoil, bedrock, parent rock
Answer: organic, topsoil, subsoil, parent rock, bedrock
Explanation:
Which is a tectonic process that forces rock up from beneath earth's surface
Answer:
Uplift is a tectonic process that forces rock up from beneath earth's surface
Uplift is a tectonic process that forces rock up from beneath earth's surface.
What is tectonic process?
The process of plate tectonics may be driven by convection in Earth's mantle, the pull of heavy old pieces of crust into the mantle, or some combination of both.
Uplift, in geology, vertical elevation of the Earth's surface in response to natural causes. Broad, relatively slow and gentle uplift is termed warping, or epeirogeny, in contrast to the more concentrated and severe orogeny, the uplift associated with earthquakes and mountain building.
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