Answers
Answer:
They perform photosynthesis, releasing oxygen into the atmosphere as a by-product.
Explanation:
Around the time that cyanobacteria appear around 3.2 billion years ago, the oxygen levels rise sharply.
Cyanobacteria are photosynthetic organisms. They possess the photosynthetic pigment chlorophyll, meaning they can trap light energy and use it to power chemical reactions to synthesise glucose. They convert carbon dioxide and water into sugar, releasing oxygen into the atmosphere as a byproduct. This causes oxygen levels to rise.
Answer:
Cyanobacteria are microbes that live primarily in seawater. They are believed to have been the first organisms on Earth to perform oxygenic photosynthesis. In this process, they produce organic carbon, the building blocks of life's molecules, and release oxygen gas (O2).As oxygen photosynthesis starts,that's when the first O2 producing of cyanobacteria occurs.The graph reaches a peak at Cambrian explosion.
Related Questions
Which answer best explains how most scientists think that planets form? A. Large chunks of matter break off a star that collides with another star; these chunks then become planets orbiting the star. B. Large chunks of matter break off a planet that collides with a smaller body; these chunks gradually clump together to become a new planet. C. A rotating cloud of space dust and gases begins to flatten and condense, forming a new star; the remaining matter forms an accretionary disc around the star, gradually coalescing to form planets. D. A rotating cloud of space dust and gases begins to condense, forming a protoplanet; if the protoplanet is massive enough, its gravity will attract nearby matter until the protoplanet becomes large and round enough to be considered a planet.
Answers
Answer: B
Explanation:
Thats what the teacher told me
The scientists believe that planets form when a rotating cloud of space dust and gases flattens and condenses, forming a new star; the remaining matter forms an accretionary disc around the star, gradually coalescing to form planets, as described in Option C, also known as the "nebular hypothesis."
What is the nebular hypothesis?The nebular hypothesis is the most widely accepted scientific theory for the planetary systems, such that the solar system and, as per this theory, a cloud of gas and dust, called a nebula, collapse due to gravitational forces; the nebula contracts, and it rotates faster, flattening into a disk, which eventually cools and condenses, forming a protoplanetary disk.
Hence, the scientists believe that planets form when a rotating cloud of space dust and gases flattens and condenses, forming a new star; the remaining matter forms an accretionary disc around the star, gradually coalescing to form planets, as described in Option C, also known as the "nebular hypothesis."
Learn more about the nebular hypothesis here.
https://brainly.com/question/27986174
#SPJ2
Circle the word that best completes the statement about cell theory.
6. The cell theory states that:
i. All organisms are made of organelles / cells.
ii. All existing cells are produced by other living dead cells.
111. The atom cell is the most basic unit of life.
7. Cell theory is one of the great unifying theories of biology / chemistry.
MAIN IDEA: Prokaryotic cells lack a nucleus and most internal structures of
eukaryotic cells.
Answers
Question reformatted:
Circle the word that best completes the statement about cell theory.
6. The cell theory states that:
i. All organisms are made of organelles / cells.
ii. All existing cells are produced by other living / dead cells.
iii. The atom / cell is the most basic unit of life.
7. Cell theory is one of the great unifying theories of biology / chemistry
Answer:
6. The cell theory states that:
i. All organisms are made of cells.
ii. All existing cells are produced by other living cells.
iii. The cell is the most basic unit of life.
7. Cell theory is one of the great unifying theories of biology
Explanation:
Cell theory is one of the central theories of biology and is universally accepted. It states that all organisms are cellular - that is they are made of cells. It also states that all living things come from other living cells (not spontaneously, or from dead cells). The cell is the most basic unit of life, organisms can be unicellular, but no living thing is 'less' than that.
When salt is dissolved in water, the water is the
solute
solvent
solution
Answers
Answer:
solution
yeyeyeyeyeyeyeyyeeyeyyeyeye
The part of the cell that is like your brain and gives instructions to the cell is
A.nucleus
B.protoplasm
C.membrane
D.fat cells
Help please
Answers
I hope it helps
Select the correct answer.
Jayden is taking a test. He has to write why scientists support the theory that life began near hydrothermal vents in the ocean. Which point should he include in his answer?
A.
Hydrothermal vents were closest to ocean surface, and therefore could receive oxygen.
B.
Oceans were dry and only had water near the hydrothermal vents in the earlier ages.
C.
Even today, all life forms are first born near hydrothermal vents and they later migrate to land.
D.
Fossils of archeabacteria, which are early common ancestors, were found near hydrothermal vents.
Answers
Answer:
The answer is; D
Archaebacteria are early life forms on earth. They utilized the process of chemosynthesis to make organic molecules from inorganic molecules and for energy. The word archae means ‘ancient’ life forms. These single-celled organisms evolved around sulfur-rich environments of the hydrothermal vents.
Answer:
D
Explanation:
Mining companies bring workers from different places. This increases business in the town nearest to the mine.
Which type of impact is being described in this scenario?
A)
atmospheric impact
B)
biological impact
C)
ecosystem impact
D)
social impact
E)
topographic impact
Answers
Answer:
I believe this is C) ecosystem impact
Explanation:
The interactions between human population dynamics and the environment have often been viewed mechanistically. This review elucidates the complexities and contextual specificities of population-environment relationships in a number of domains. It explores the ways in which demographers and other social scientists have sought to understand the relationships among a full range of population dynamics (e.g., population size, growth, density, age and sex composition, migration, urbanization, vital rates) and environmental changes. The chapter briefly reviews a number of the theories for understanding population and the environment and then proceeds to provide a state-of-the-art review of studies that have examined population dynamics and their relationship to five environmental issue areas. The review concludes by relating population-environment research to emerging work on human-environment systems.
1. The increase in the reproductive success of a species will have the greatest impact on
the-
Answers
Answer:
The increase in the reproductive success of a species will have the greatest impact on the prey of the animal.
Explanation:
The prey's population will decrease because there are more animals needing it to survive.
Which of the following is NOT a function of the cell membrane
a. contains genetic information
b. provides a boundary for the cell
c. controls transport
d. provides protection for the cell
Answers
the cell membrane protects the cells and controls what goes in and out of it. all genetic information (or dna) gets stored in the nucleus at the center of the cell.
Which of the following is a reason for the genetic variability from sexual reproduction?
A. The more variety there is in the gene pool, the less arrangements in the population.
B.The genes that are “dealt” to the offspring from their parents are by systematic event.
C. Offspring have the same gene combinations of either of their parents.
D. Members of a species choose mates, creating different combinations of genes.
Please help. This is due today.
Answers
Answer:
the answer is d opinion
why do we need to study, talk and explore the Male and Female Sexual Anatomy
Answers
how do birds the ant seen here reproduce
Answers
Can I get brainliest please
Which of these best explains why one should never come between a cow and her calf? aaniaml systems. ACalves cannot see until they are a year old B Young calves are easily disoriented and lost C Human scent transfers easily onto calves. D Mother cows have fierce maternal instincts Thing
Answers
Young calves are easily disoriented and lost is the reason why best
explains why one should never come between a cow and her calf.
What is a Calf?A calf is regarded as a young cow and are often reared to become adults
before they are used for several purposes such as beef etc.
They are usually under the guidance of their mother in order to prevent
various forms of hazard. This is as a result of them being susceptible to
getting lost as a result of their disorientation.
Read more about Calves here https://brainly.com/question/1290566
describe three anatomica features of humans that adapt them for endurance running?
Answers
1. Form hypothesis: How does temperature affect oxygen concentrations?
If you're correct then I'll give you brainliest! c:
Answers
Answer:
Hello!!! Princess Sakura here ^^
Explanation:
First things first if we are going to form a hypothesis it doesn't matter if it is correct hypothesis are supposed to get tested.
So anyways....
I believe that the solubility of oxygen will decrease as the temperature increase.
I believed that because as temperature increases molecules start to move faster and move farther away from each other.
Temperature can have a significant impact on the concentration of oxygen in various environments. 1) Solubility of Gases, Oxygen Dissociation, Biological Processes.
Here's a step-by-step explanation of how temperature affects oxygen concentrations:
1. Solubility of Gases: The solubility of gases, including oxygen, in a liquid like water is affected by temperature. Generally, as temperature increases, the solubility of gases decreases. This means that at higher temperatures, less oxygen can dissolve in water or any other liquid.
2. Oxygen Dissociation: In the context of the human body, temperature affects the dissociation of oxygen from hemoglobin in red blood cells. As temperature increases, the affinity between oxygen and hemoglobin decreases. This means that oxygen is more readily released from hemoglobin and made available to tissues and organs. Conversely, as temperature decreases, the affinity between oxygen and hemoglobin increases, making it more difficult for oxygen to be released.
3. Biological Processes: Temperature also affects the metabolic rates of organisms. Generally, as temperature increases, metabolic rates increase, leading to higher oxygen consumption. For example, in aquatic ecosystems, warmer water temperatures can enhance metabolic rates of aquatic organisms, leading to increased oxygen demand. Conversely, lower temperatures can slow down metabolic rates and reduce oxygen demand.
It's important to note that the specific effects of temperature on oxygen concentrations can vary depending on the system or environment being studied. Different factors such as pressure, salinity, and the presence of other substances can also influence the relationship between temperature and oxygen concentrations.
To know more about Oxygen Dissociation:
https://brainly.com/question/31591852
#SPJ6
what are catabolic reactions
Answers
Answer:
which complex molecules are broken down to simpler components, are classified as catabolic reactions. Taken as a group of reactions within a cell or even an organism, they can be referred to as the cell's or organism's anabolism or catabolism.
Explanation:
If the pride is taken over by a new individual what happens to the females? Males? Cubs?
Answers
Answer: When a new male coalition first takes over a pride, the cubs represent a major impediment to their reproduction. Mothers of surviving cubs will not mate again until their offspring are at least 18 months of age but will mate within days if their cubs are lost.
Explanation:
If a red-eye female fly is crossed with a red-eye male fly, could they produce offspring with white eyes? Briefly explain your answer. Your answer must include a Punnett square that proves your answer.
Answers
If the red-eye parents are homozygous, no. But if the red-eye parents are heterozygous, yes.
Monohybrid crossingWe are assuming that the red-eye trait is dominant over the white-eye trait. If two red-eye parents are crossed with one another, whether they could produce white-eye offspring would depend on the zygosity level of the parents.
Assuming that red-eye is R and white-eye is r. If the two parents are homozygous red-eyed, their genotypes would be RR. Crossing the two:
RR x RR
RR RR RR RR
All the offsprings would be RR and there is a zero chance of producing a white-eye offspring.
Now, assuming that the two parents are heterozygous:
Rr x Rr
RR Rr Rr rr
Both RR and Rr are red-eyed while rr is white-eyed. The Punnet's square for the cross can be found in the attached image.
In other words, it will only be possible for the two red-eye parents to produce white-eye offspring if they are both heterozygous. Any other genotype will give a zero chance of white-eye offspring.
More on monohybrid crossing can be found here: https://brainly.com/question/15314052
#SPJ1
DATA ANALYSIS
% OF CELLS IN EACH PHASE OF THE CELL CYCLE
90
30
20
GO
30
40
30
20
10
INTERPHASE
PROPHASE
METAPHASE
ANAPHASE
TILOPHASE CTO NESS
Image or Sketch
Description
Interphase
Prophase
Answers
Answer:
A __________________ is a place holder or object where you can store a value or piece of data named by you
There are many reasons why all humans do not perceive sounds similarly in our environment, including adaptation, hearing loss and/or deafness.
For 2A-2D, first determine whether the scenario is an example of sensory adaptation, conduction deafness, sensorineural deafness, and/or central deafness.
Second, for the scenarios that are examples of deafness, explain briefly how the scenario leads to deafness (i.e., how does the scenario alter normal auditory processing). If you have selected sensory adaptation as an answer, explain briefly why the scenario does not fall under the categorization of deafness. Use your own words to briefly explain - simply listing definitions is not sufficient. (2.5 points each for matching, 5 points each for correct justification)
2A. Listening to excessive loud noises everyday over years that causes loss of stereocilia
2B. Hearing construction outside when it first begins, but no longer noticing the sound minutes later
2C. Difficulty understanding speech, but no damage to ears or ability to understand nonverbal sounds
2D. A hole in the tympanic membrane caused by an ear infection
Answers
Answer: 2A Sensorineural deafness
2B Sensory adaptation
2C Central deafness
2D Conductive deafness
Explanation: The human ear is divided into 3 parts:
Outer Ear: auricle, ear canal and tympanic membrane;Middle Ear: eardrum, tympanic cavity and ossicles (malleus, incus and stapes);Inner Ear: oval window, semicircular ducts (attached to cochlea and nerves), cochlea and auditory tube;The Sensorineural deafness is a type of deafness caused by a damage in the inner ear, either the cochlea or the auditory nerve. It can happen because of medicine toxicity, exposure to noise along the years etc.
So, from the scenarios above, 2A is consistent with sensorineural deafness since stereocilia are hair cells of inner ear.
Sensory adaptation is a phenomenom that happens when an individual's sensory receptors is exposed to a stimuli for a prolonged period of time. For example, the situation described in 2B. It is not considered deafness because it is not caused by a damage in any part of the ear.
Central deafness is a very rare case of deafness. The damage in this type of deafness is in the brain and not in any of the 3 parts of the ear. That's why the scenario in 2C is the example of this.
Conductive deafness is the second most common type of ear problem and it occurs in the outer ear. One of the causes is blockage in the ear canal by the ear wax, external bodies, osteomas (bone growth) or otitis (oute ear infection). An example of this type of deafness is scenario 2D.
What are the consequences of uncontrolled sexuality?
Answers
Which evidence from the Hershey-Chase experiment demonstrated that DNA, not protein, is the genetic material
Answers
Answer:
The evidence from the Hershey-Chase experiment demonstrated that DNA, not protein, is the genetic material DNA contains phosphorus, but protein does not was as result of some analysis in which it was discovered that Protein contains sulfur and DNA does not.
This was what led to the use of radioactive phosphorus and radioactive sulfur in self-identification.
environmental science aim to solve problems such as the extinction of a specific animal or plant species and deal with important issues such as
Answers
Answer:
Explanation:
5. Zebras (grass-eaters) are th
6. Lions (zebro-eaters) are
Quartamary consumen
7. Give examples of 2 "higher order" consumersShake racon
8. What two types of consumers are missing from this pyramid?
and
9. On the average, how much energy is lost from each trophic level?
Explain WHY.
10. Why are there so FEW quaternary and tertiary consumer in a food web?
2
What t
Answers
Lions are Carnivores (secondary consumer)
Snake Raccoon
Third Level Consumer and Apex Consumer
10%
They have less to eat as you go up the pyramid
Which letter marks the zone of inhibition?
Answers
Answer:
A. B
Explanation:
"B" as labelled in the above is the zone of inhibition.
The Zone of Inhibition is actually a test which is used to assess antimicrobial activities of a material or solution in relation to an micro-organism as a target. It is also known as Kirby-Bauer Test. It measures the antibiotic resistance and also used to inhibit microbial growth.
At the Point B, microbes can not grow in there; they are inhibited.
In the test, if bacterial strain or any other strain is susceptible to the antimicrobial agent, a zone of inhibition appears. If it shows resistance to that agent, then no zone is evidential.
how does a plant cell differ from an animal cell?
Answers
Answer:
differences between a plant and an animal cell include: Plant cells have a cell wall, but animals cells do not. Cell walls provide support and give shape to plants. Plant cells have chloroplasts, but animal cells do not.
Explanation:
Got this from google hope this helped!:)
what is thesaurus and online resources?
Answers
Answer:
thesaurus is a book that is filled with all types of synonyms for words
synonyms are words that are different but same in meaning
eg: yummy
another word for yummy is delicious
so delicious is a synonym that is included in the book named thesaurus
hope it helps
; )
Explanation:
When ATP is hydrolyzed, are you adding water or removing it? Explain 20 points I’ll do brainlest too
Answers
Answer:
Are there answers
Explanation:
Answer:
adding water
Explanation:
hydrolysis means adding water to it
True or False: Larger pigments will travel a greater distance on filter paper than smaller pigments.
Answers
Answer:
true true true true
true true
Answer:
I think the answer is true
Explanation:
A pigment that is the most soluble will travel the greatest distance and a pigment that is less soluble will move a shorter distance.
NEED ANSWER ASAP! Aside from safety, which of the following is an additional benefit of understanding animal behavior? A Reduced stress improves the health, fertility, and production of animals B Animals that feel understood are more likely to stifle aggressive tendencies C Well trained animals receive a higher market value than do untrained animals D Handling that have a strong connection to their animals often get breeding rights
Answers
Answer:
I think its A.........
Answer:
It's A
Explanation:
What organelle is attached to the Rough ER
Answers
Answer:
Ribosomes
Explanation:
Answer:
The ribosomes.
Explanation: