Use the following information when answering the following question. In 1668, Francesco Redi performed a series of experiments on spontaneous generation. He began by putting similar pieces of meat into eight identical jars. Four jars were left open to the air, and four were sealed. He then did the same experiment with one variation: Instead of sealing four of the jars completely, he covered them with gauze (the gauze excluded the flies while allowing the meat to be exposed to air). In both experiments, he monitored the jars and recorded whether or not maggots (young flies) appeared in the meat. What hypothesis was being tested in the initial experiment with open versus sealed jars
Answer:
The correct answer is: Maggots do not arise spontaneously but from eggs laid by adult flies.
Explanation:
According to the experiment Redii, The maggots are present only in the open jar not in the sealed jar. The adult flies can not go in or out of the jar to the meat and can not lay the eggs on meat whereas in an open jar the adult flies can easily get in the jar and lay the eggs on meat.
On the basis of the above response and explanation, it can be concluded and hypothesize that maggots do not arise spontaneously but from eggs laid by adult flies.
steven observes ducks on a pond going underwater for several seconds at a time before resurfacing. The ducks are most likely:
F. playing with the ducks
G. obtaining oxygen from the water
H. communicating with other ducks
J. feeding
Wood is ___. Light cannot pass through it.
Answer:
hope i helped!
Explanation:
a solid!
What occurs during the process of gas exchange?
Answer:
During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs.
What is the name of the process that uses DNA to create proteins?
A. Protein Synthesis
B. DNA coding
C. DNA Synthesis
D. Protein magic
Answer:
A. Protein Synthesis
Explanation:
Protein synthesis is the process in which cells make proteins. It occurs in two stages: transcription and translation.
It is possible for a repressor to negatively regulate the expression of an operon because: A. the repressor-binding site overlaps the promoter site of the operon, allowing it to physically block the binding of RNA polymerase. B. the repressor induces the expression of the inducer by binding to the promoter that comes before the inducer gene. C. the repressor-binding site on the DNA overlaps with the translation start site, thereby preventing the transcription. D. one of the structural genes expressed in the operon negatively regulates the repressor. E. the repressor physically blocks where the activator should be binding on the operator region.
Answer:
A.
Explanation:
the repressor-binding site overlaps the promoter site of the operon, allowing it to physically block the binding of RNA polymerase.
Mendel chose pea plants with easy to see ___________, each of which had two forms. For example, flower color is a characteristic with two forms:purple or white.
Answer:
alleles/phenotypes
Match the types of resources with their descriptions renewable and nonrenewable or both
Solution :
1. They can be reproduced on a human timescale --- renewable resources
2. They take millions of years to form -- non renewable resources
3. They are produced naturally -- renewable resources
4. They are extracted by mining -- non renewable resources
5. Their use as an energy source is increasing because they reduce pollution -- renewable resources.
Answer:
I hope I'm right
help me out, I will give link below copy and paste it and tell meh the answer plz
Answer:
Explanation:
Where’s the link I’ll be happy to help
Walking sticks are insects that may have either a striped body or a body without stripes. In one region where these walking sticks live, the vegetation is a plant with needle-like leaves that resemble the walking stick’s striped body. According to natural selection, what would most likely result from an increase in walking stick predators in the region? (SC.7.L.15.2) A.walking sticks without stripes will reproduce faster B.walking sticks with stripes will become more common C.walking sticks will develop a new, spotted pattern for their bodies D.walking sticks will live on rare plant species rather than the dominant species
Answer:
B. Walking sticks with stripes will become more common.
Explanation:
The striped bodies of the walking sticks will help them camouflage in the plants. The predators will be more likely to kill off the unstriped walking sticks, leaving the striped walking sticks to grow in population and become more common.
does anyone know any of these answers??!
Answer:
free ponts how kind of you
Explanation:
NASA scientists use satellites to monitor two important factors that lead too landslides
Answer:
The most important factors that lead to landslides are the declivity of the terrain and the type of soil.
Explanation:
Stony soils are more prone to landslides, especially on steep terrain and without any type of vegetation cover. During heavy rainfall, these two factors can promote landslides that cause major disasters, as water is able to drag this soil violently. To prevent this from happening and people from being harmed, NASA has developed satellites, which capture rainfall data and monitor the slope and composition of soils, being able to see in advance areas that could be landslides. In this way, it is possible to develop strategies that prevent the landslide from happening.
A population of squirrels eats acorns from local oak trees. In some years, oak trees produce much greater
numbers of acorns than usual.
Which of the following is the most direct effect of an increase of acorns on the squirrel population?
Answers
A The population has fewer predators.
B The population size increases.
C The population expands its territory into new habitats.
D The population size decrease due to competition.
Answer:
B
Explanation:
The population size increases
A population of squirrels eats acorns from local oak trees. In some years, oak trees produce much greater numbers of acorns than usual. The most direct effect of an increase in acorns on the squirrel population would be: the population size would increase, which is option B.
When there is an abundance of acorns, the squirrel population can benefit from a readily available food source. With more food available, squirrels are better able to meet their nutritional needs and reproduce successfully. This leads to an increase in the population size as more squirrels are born and survive due to the abundance of resources.
Learn more about the food chain here.
https://brainly.com/question/32657908
#SPJ2
how are decomposers important ton the health of an ecosystem?
A. decomposers recycle nutrients.
B. decomposers are parasites
C. decomposers convert solar energy to chemical energy
D. decomposers provide the foundation for the food web
Answer:
It should be decomposers recycle nutrients
Explanation:
In pea plants, the tall phenotype is dominant to the dwarf phenotype. A tall plant and a dwarf plant are crossed together. Half of their offspring are tall, and the other half display dwarfism. What is the genotype of each parent in this cross?
Answer and Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files.
A force that always attracts or pulls objects toward each other without direct contact or impact. *
a. Force
b. Friction
c. Gravity
d. Inertia
Is the dominant allele always written before the recessive allele in a genotype? Or does it not matter?
Answer:
It is always written before
Explanation:
What is aerobic respiration?
c the process cells use ti
If both parents have a recessive phenotype "aa", what will the offspring
have?
Answer: posibble to have aa or a
Explanation:
hey can someone pls put them in order pls and not guess or leave any links. (i’ll be giving brainiest to the correct order)
Answer:
Large Intestine - 1
Pancreas - 5
Small Instestine - 3
Liver - 4
Esophagus - 2
Stomach - 6
When looking through the spectrascope, the sunlight looks like ?
A:rainbow
B:red light
C:green light
Answer:
i believe it is a
Explanation:
An oil mining company has started drilling oil offshore at a location. Thus far, it has benefitted the people by increasing employment opportunities in the area. Predict the most likely outcome the oil mine will have on the environment?
It will cause drying up of water in plants.
It will emit radiation which destroys plants.
It will produce greenhouse gases which pollutes soil.
It will contaminate the soil and water in the ocean.
Answer:
It will contaminate the soil and water in the ocean.
Explanation:
This is because the oil drilling will cause oil spillage on the soil and water in the ocean. The oil spillage will cover the oil and it will not allow plant to grow there. Any crops planted there will not grow because it had release chemical and act as covering which cannot support plant growth. When it is washed into the ocean or water bodies, it can lead to death if aquatic live because it will affect the amount of oxygen that will available to them.
Answer:
It will contaminate the soil and water in the ocean.
Explanation:
Points earned on this question: 3 ;)
Track the evolutionary path of a butterfly and comment on it.
Answer:
The colorful canvas of the butterfly wing is an example of evolutionary innovation and adaptation. Compared with their ansestors, whose wings wore patterns of black, brown, and gray, the Lepidoptera (butterflies and moths) evolved a more varied palette of pigmentation.
I think it is very cool that they were able to evolve. For example, some butterflies use their bright colors to trick preators into thinking they are poisonous. The early butterflies could not do this.
Explanation:
Please brainliest!
Based on scientific information, the evolutionary path of a butterfly is primarily based on the origin of its species to eukaryotes and then to bilateria.
What is an evolution?An evolution refers to a biological and physical process that involves a gradual change in the characteristics and genetic make-up of the various species of organisms over several generations.
Based on scientific information, the evolutionary path of a butterfly is primarily based on the origin of its species to eukaryotes and then to bilateria such as:
Mid Eocene epochMid-CretaceousMothButterfly is a species of living organism with various characteristics and genetic make-up that have been in existence for about 60 million years.
Read more on evolution here: brainly.com/question/524043
What types of things do you do to protect yourself from danger?
Answer:
Explanation:
Trust yourself. ...
Be aware of your surroundings. ...
Pay attention to the people around you. ...
Act confident and focused. ...
Understand that alcohol or drugs can cloud judgment.
3 functions of lipids
Know how to calculate the amount of chromosomes in mitotic cells and in gamete cells, when given an amount of the chromosome number for one of the two types of cells. For example, a fruit fly has 8 chromosomes or 4 pairs of chromosomes in its wing cells, how many chromosomes will be in each egg cell?
Answer:
4 chromosomes
Explanation:
Meiosis is a kind of cell division that produces daughter cells that already have their chromosome number reduced by half. Due to this reason, meiosis is called a reduction division. A diploid parent cell (2n) will produce gametes with haploid cells (n).
According to this question, a fruit fly has 8 chromosomes or 4 pairs of chromosomes in its wing cells, after undergoing meiotic division, it will possess 4 chromosomes in each gamete cell. Note that the chromosome number has been reduced by half.
__1. Where do FSH and LH get released from?
a. Pituitary Gland c. Uterus
b. Ovaries d. testes
_______2. Which hormones are produced in the ovaries?
a. testosterone c. FSH
b. estrogen and progesterone d. LH
_______3. Which hormones causes release of progesterone?
a. testosterone c. estrogen
b. FSH d. LH
_______4. What do estrogen and progesterone do in the menstrual cycle?
a. they stimulate the release of egg
b. they are involved in egg maturation in the ovaries
c. they are involved in maintaining the uterus lining
d. none of the above
_______5. Which of the following is/are the role of testosterone in males?
I. Pre -natal development of male genitalia
II. Maintenance of sex drive
III. Increase in mental development
a. II only c. II & III only
b. I & II only d. I, II, & III
Answer:
1.testes
2.estrogen
3.LH
4.(b)
Compare and contrast negative and positive feedback loops. Which one is more common? Why?
Answer:
Negative Feedback LoopsA negative feedback mechanism or loop is a pathway stimulated by the deviation in the output, which causes changes in output to the direction opposite to the initial deviation.The negative feedback mechanism moves the variable factors towards the stable state or homeostasis after the control unit interprets the extent of the deviation.Negative feedback loops are more common than positive ones as they tend to stabilize the system.The loop detects the change in output and acts in the opposite direction to nullify the stimulus causing the change.These loops are activated under two conditions; when the value of the variable is above the normal value and has to be brought down and when the value of the variable is below the normal values and has to be brought up.Negative feedback mechanisms occur as a part of homeostasis to bring the variables back to their normal levels by counteracting the stimulus, causing the deviation in the first place.Like in a positive feedback mechanism, a negative feedback mechanism also contains different components that together help to maintain a stable state.Examples of Negative Feedback Mechanism
1. Regulation of blood glucose level
2. Temperature regulation
Positive Feedback LoopA positive feedback mechanism, as the name suggests, is a pathway that in response to a deviation in the output causes the output to change even more in the direction of the initial deviation.A positive feedback mechanism amplifies the deviations and brings state changes to the output.Positive feedback mechanisms are far less common than negative feedback mechanisms as it moves the body away from homeostasis.The process of positive feedback mechanism progressively amplifies the response as long as the stimulus is continued.The positive feedback loop can consist of either a single component that activates its own activity or several components with direct and indirect interactions.Positive feedback loops in biological processes are often observed in processes that need to occur quickly and towards completion as the output tends to increase the effect of the stimulus.Positive mechanisms are very few within living systems like the human body, but these can also be observed in the ecosystem, like in the case of ripening of fruit.Examples of Positive Feedback Mechanism
1. Menstrual cycle
2. Childbirth
Negative feedback loops are more common than positive ones as they tend to stabilize the system.
Positive Feedback vs Negative Feedback (8 Key Differences)Definition
The positive feedback mechanism is a pathway that in response to a deviation in the output causes the output to change even more in the direction of the initial deviation. A negative feedback mechanism or loop is a pathway stimulated by the deviation in the output, which causes changes in output to the direction opposite to the initial deviation.Effect on the homeostasis
A positive feedback mechanism breaks down the homeostasis system of the body. A negative feedback mechanism works to maintain the conditions of homeostasis in the body.Occurrence
The positive feedback mechanism is less common and occurs in specific situations.The negative feedback mechanism is more common and occurs in different organs and systems in the body.Stability
The positive feedback mechanism is less stable.The negative feedback mechanism is more stable.Effect
In a system with a positive feedback mechanism, the effective input is increased by the addition of actual input with the feedback signal.In a system with a negative feedback mechanism, the effective input is decreased as the feedback signal inhibits the actual input.External interruption
A positive feedback mechanism might require an external interruption.A negative feedback mechanism doesn’t require an external interruption.Changes
Positive loops enhances the change in physiological factors.Negative loops resists changes in physiological factors.Examples
Positive feedback mechanism in nature is observed during childbirth in humans and during the ripening of fruits. The negative feedback mechanism is observed during thermoregulation and maintaining the blood glucose level.Which of these mutations do you think would have the worst effect on the function of
the protein?
an insertion or
deletion near
the end of a
gene
an insertion or
deletion at the
beginning of
an insertion at
the middle of
a nonsense
mutation at the
end of the gene
a missense
mutation
the gene
the gene
Answer:
Both are harmful for the organism in case of point mutation. In case of deletion or insertion of a particular fragment of the gene, deletion could be more harmful than insertion, because the deleted fragment of the gene will never be replaced at exact size and exact position of the disabled gene.
Explanation:
hope it helps
Which statements correctly describe greenhouse gases?
Answer:
1. Greenhouse gases absorb all kinds of radiation that fall on them
2. Greenhouse gases are released when the suns rays hit earth
3. Greenhouse gases allow the suns rays to pass through
4. Greenhouse gases absorb infrared radiation from earth’s surface