What was the variable in Redi's experiment?

a swan neck flask that prevented air from getting in


a straight neck flask to allow air to get in


meat sealed in jars that didn’t have contact with air


uncovered meat that had contact with air

Answers

Answer 1

Answer:

meat sealed in jars that didn’t have contact with air

Explanation:

Answer 2

Answer:

The last one is the correct answer.

Explanation:


Related Questions

Can anyone give me an example of Biodiversity

Answers

Answer:

The definition of biodiversity refers to the amount of diversity between different plants, animals and other species in a given habitat at a particular time. The different varieties and types of animals and plants that live in the ocean is an example of biodiversity.

Explanation:

Substance A's molecules are small. Substance B's molecules, which react with substance A to produce a blue-black color, are larger in comparison. If a solution of substance A is placed inside a selectively permeable bag, and the bag is placed in a solution of substance B, what will happen?

Answers

Here's link to the answer:

tinyurl.com/wpazsebu

When A reacts with B, it turns blue-black because the substance A is starch and its molecules are small, which is glucose. The substance B is iodine, which combines with starch to become blue black. If A is present in B, then the A will become blue black.

What is the reaction between the starch and the iodine?

Starch is a polymer that is made up of glucose monomer and is found in plant-based food products. This starch can react with iodine and produce a blue-black coloration, so when the substance A is placed in the substance B with a selectively permeable membrane, the substance B (iodine) can easily enter the starch and form the blue-black coloration. This is known as the starch-iodine reaction, and it results in a blue-black polysaccharide.

Hence, if a solution of substance A is placed inside a selectively permeable bag and the bag is placed in a solution of substance B, then the substance A (starch) will turn blue-black.

Learn more about the starch and iodine reaction here.

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A private reptile breeding facility near the Everglades was destroyed by Hurricane Andrew in 1992. This event contributed to the original influx quantities of pythons in the wild. Pet owners also contributed to the introduction of these reptiles to the Everglades by releasing pets that had grown too large to care for. These reptiles are considered species to this ecosystem.

can someone please write an explanation that describes the impact of the Burmese python on the Everglades?

Claim:

Evidence:

Reasoning:

Answers

Answer:

Claim:

The increase in the population of the Burmese python in Everglades is affecting the ecosystem of said area. They are an invasive species.

Evidence:

From 1994 to 2007, the Burmese python population increased from a small number below 50 species to more than 250 by 2007. As the Burmese population increased, the mammals' population in Everglades decreased significantly and even had extincted some species. For example, from 1993 to 1999, there were 64 white-tailed deer and five red foxes, and grey foxes. Between 2003 and 2011, there were 24 white-tailed deers and 0 foxes. Overall, there is a decrease in all mammals.

Reasoning:

The increasing number of Burmese Pythons due to the release of them by pet owners and due to the destructions of a private reptile breeding facility left a high number of pythons in the wild. As a consequence, these pythons ate other animals producing an imbalance in the Everglades ecosystem. Owing to its large number and how they are harming the ecosystem, they are considered an invasive species.

Explanation:

After analyzing the information, the claim is that the increasing population of pythons harms the Everglades' ecosystem.

The evidence that supports the claim is present in the graphics, where we can see how the population of this reptile grew over the years, and the mammals' population decreased. There is specific information about the reduction in the number of mammals in the area, such as the raccoon, foxes, rabbits, etc.

After presenting the evidence, the reasoning that we can make is that the pythons are killing the other animals in Everglades. Also, we can see that they are not a native species from the area since they were released by pet owners and by a breeding facility by accident. The fact that they are harming the Everglades' ecosystem and that they are not native species makes them an invasive species.

Hunting reserves also support wildlife conservation.give reason

Answers

Answer:

. because wild life is a renewable natural resource

What is so important about Earth's placement in the solar system?

A) It is exactly 93 million miles away, which is the magic zone for every star in the
universe
B) It's in the habitable zone - not too close and not too far from the sun
C) It's the third planet, and only #3 is considered "just right around any given star

Answers

Hi! Your answer should be B, the placement of Earth is just right in the third spot. If we were any closer the sun would burn us, if we were any farther then we could freeze, hope this helps!

State ONE reason why muscle tissues are likely yo be affected by mitochondrial diseases.

(PLEASE ANSWER ASAP DUE VERY SOON, 15 POINTS!!)

Answers

Answer:

Mitochondria give more than 90% of the energy used by the body's tissues; mitochondrial disorders are caused by a lack of energy for cells of the body

Explanation:

fill the vocab
biology

Answers

1. interact
2. Non-living
3. Living
4. Reproduce
5. Community
6. Species
7. Biosphere
8. Ecosystem
9. Biodiversity

1. interact

2. nonliving

3. living

4. reproduce

5. population

6. biosphere

7. species

8. ecosystem

9. biosphere

10. biodiversity

Through the process of nitrogen fixation, legumes such as beans or peas have colonies of nitrogen-fixing bacteria attached to their roots. The plants gain nitrates from the bacteria, and the bacteria gain sugars from the plant. Which type of symbiotic relationship occurs between legumes and nitrogen-fixing bacteria?
Commensalism
Mutualism
Parasitism
Predation

Answers

Mutualism is the answer


Please answer asap!


what is the difference between sleet and freezing rain?

Answers

Answer:

Freezing rain comes when the cold layer is small. This doesn't allow the raindrops to fully freeze before hitting the ground. Sleet forms when there is enough time for the raindrops to freeze completely before hitting the ground

Explanation:

Sleet is already half-frozen, while  freezing rain is icey cold and freezes when it hits the ground

A gray-eyed alien and her black-eyed husband want a white-eyed baby.
Is it possible for a gray-eyed alien and her black-eyed husband to have a white-eyed baby?

Answers

Answer:

Yes, this is very possible.

Explanation:

kenrflkerfnlerfer

Write a hypothesis showing the effect of nutrients in the soil on the growth rate of the tomato plant

Answers

Hypothesis:

As the tomato plant grows, nitrogen levels in the soil will decrease

A hypothesis showing the effect of nutrients in the soil on the growth rate of the tomato plant is As the tomato plant grows, nitrogen levels in the soil will decrease.

What is soil ?

The  soil is  a mixture of different components which comprises  minerals, organic matter, and living organisms, it is a loose sediment,  Moreover, there are different types of soil like Clay Soil, Sandy soil, Loamy Soil, Silt Soil

soil  it is One of the most crucial components of the biosphere, this particle is composed of 45% minerals, 50% spaces  and 5% organic matter, the soil involve in  many important functions such as Providing a growth medium for the plants, Acts a modifier of the earth’s atmosphere

The formation of soil involve in different process , it can be formed   by weathering of rocks and the weathering of Solid rock  occur in three way like Mechanical Weathering, Chemical Weathering, Biological Weathering

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pls help! In dragons, fire breathing is a sex linked (x- linked) trait. Fire breathing is a recessive condition carried on the x chromosome.

Identify the sex and if it is a fire breathing dragon or a non-fire breathing dragon
a) XX
b) XTY
c) XY
d) XXT
e) X*XT

What would be the genotype for each of these dragons?
a) Fire breathing female
b) Non-fire breathing male
c) Non-fire breathing female
d) Carrier for fire breathing female​

Answers

Non fire breathing animal is the answer i hope ( I apologize if its wrong )

To what genus does the following organism belong to: Crotalus adamanteus *
A.Eukarya
B.adamaneteus
C.Crotalus
D.Animalia

Answers

Answer: crotalus

Explanation: i just took the test

If a plant is an organism then the plants leaves, roots and stems are what level of organization?

Answers

Answer:

organ systems

which includes all parts above the ground such as leaves, stems, roots and tubers.

Plants leaves, roots and stems are organ systems.

—Evidence—
•] Plants contain just two organ systems. The shoot system includes all of the parts above the ground, such as leaves and stems, while the root system includes all of the parts below the ground, such as roots and tubers.

An image of an influenza virus is shown. The spike-like structures that cover the virus are surface proteins.
What is the function of the surface proteins on the influenza virus?

Answers

Answer:

D. to remove a host cell's DNA

Explanation:

I hope that this helped you :D

Answer:

I got it right... this is a first choice D) to remove a host cell's DNA

Explanation:

thank you!

give me a mark for brainly

Question 7 brainliest involved

Answers

Answer:

Its B i think hope it helps

Explanation:

the specific physical location in which a given species lives is called its
a- community
b- abiotic factor
c- climate
d- habitat

Answers

Answer:

d

Explanation:

ANSWER:D
Explanation: because habit is a place were animals live

1.
DNA has the limited ability to repair itself when damage
occurs. What might happen to cause damage to the DNA in a
cell?

Answers

DNA Damage: Causes and Effects
The most significant consequence of oxidative stress in the body is thought to be damage to DNA. DNA may be modified in a variety of ways, which can ultimately lead to mutations and genomic instability. This could result in the development of a variety of cancers including colon, breast, and prostate. Here we discuss the various types of damage to DNA, including oxidative damage, hydrolytic damage, DNA strand breaks, and others.

what is the mRNA of GAGATTTACCGTAGC

Answers

Answer:

CUCUAAAUGGCAUCG

Leu-Ter-Met-Ala-Ser

Explanation:

this should be correct, in mRNA A codes for U, T codes for A, C codes for G and G codes for C. Hope this helps

The reproductive strategy when hatchlings are able to move and
feed themselves​

Answers

Explanation:

Precocial development The reproductive strategy in which hatchlings of birds are able to move and feed themselves.

Which population is limited by a density- dependent factor?

Answers

That’s a virus bro it’s not the answer

How does the stomach protect itself from being digested by its own gastric juices?
a]it secretes mucin that coats the lining
b]the pancreas adds insulin to the stomach
c]it squeezes gastric juices only in the middle
d]the liver sends bile to the stomach

Answers

The answer is a] it secretes mucin that coats the lining

Scientists have genetically modified a variety of corn to protect it against 6 points
its predator, the corn borer. This variety of corn now produces a chemical
that is toxic to the corn borer. How will the genetic modification benefit
the entire ecosystem? *
The corn plant will be able to survive and produce more food for the ecosystem.
The chemical produced by the corn plant will be consumed by others in the
ecosystem.
The modified gene will mutate, and the new chemical produced will not be toxic to the
corn borer.
The corn plant will self-fertilize and cross-pollinate and continue to produce pest
resistant corn plants.

Answers

Answer:

the entire ecosystem? *

The corn plant will be able to survive and produce more food for the ecosystem

Explanation:

Considering a trophic web and competition for resources, we could say that the genetic modification benefit s the entire ecosystem because the corn plant will be able to survive and produce more food for the ecosystem.

---------------------

Assuming competition for resources between different species, and considering the trophic web, we could conclude that the genetic modification benefit s the entire ecosystem is because the corn plant will be able to survive and produce more food for the ecosystem →→→ Option A.

We need to think about the whole ecosystem when answering this question.

Let us think about the trophic web.

The trophic web is a relationship process between different organisms, through which occurs transference of energy.

These organisms place at different levels. The ones placed at lower levels pass energy to the ones at the higher levels. Each level feeds on the anterior one and gets eaten by the next one.

As it is a web, all organisms are equilibrated until a change occurs.  

When the change affects any of the involved links, there can be a cascade effect on the web.

A change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.

Also, when two or more species are competing for the same source of food, a change in any of the population sizes will affect the other ones.  

In the exposed example, we will assume the corn borer was a successfull competitor and was preying on the corn. When eliminating it by the action of the toxic chemical, other organisms will experience a repercussion.

As the corn borer dies, the corn plant grows better and faster.

It might develop more foliage, flowers, and fruits, which might be acting as sources of food and shelter for different species.

Many other species might benefit from this genetic modification.

The corn plant development provides food,  shelter and protection for many other species.The corn borer death means less competitive pressure for many other species.

The other options.

B) The chemical produced by the corn plant will be consumed by others in the  ecosystem. ⇒ Depending on the chemical, it cause no effect on other species, or might affect them. In any case, it is not beneficial for ecosystem.

C) The modified gene will mutate, and the new chemical produced will not be toxic to the  corn borer ⇒ If this was the case, the corn plant would still be affected and the predator would still preying on the plant.  

D) The corn plant will self-fertilize and cross-pollinate and continue to produce pest  resistant corn plants ⇒ This would not involve other species.

-------------------------

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Hi guys! Enjoy some points on this sunny Monday!

Answers

Answer:

thnx!

Explanation:

Answer:

thank youuuuuu

Explanation:

HOT PHONI
MOMRON
PRODUNA
A
The old strand of DNA reads TACGAATAG. Enzyme B makes the
new RNA strand:
OUACGAAUAC
ATG CITATG
AUG CUU AUC
AUGGUUUAUC
QUESTION 14
1 points
Save Answer

Answers

Answer:

The correct answer would be - AUGCUUAUC

Explanation:

The new mRNA strands are made by the process called transcription that involves an enzyme that helps to copy a segment of DNA or gene to produce a new RNA strand that encodes for the protein. In this process, a new RNA strand copied the complementary to the sequence of DNA strand. It means adenosine is copied into its complementary form uracil in RNA, Thymin to adenosine, cytosine to guanine and guanine to cytosine.

Original strands: TACGAATAG

new RNA strand: AUGCUUAUC

A valid scientific investigation must be able to be

Answers

Answer: in order for a scientific investigation to be valid A hypothesis must be tested throughout a Scientific investigation that can gather evidence and support it.

Explanation: in any scientific investigation you have to have a testable hypothesis, without your hypothesis it’s not really a scientific investigation.


Hope this helped!

What is the function
of the Slavery glands
.what is the function of the slavery glands ​

Answers

Answer:

To produce saliva which breaks down food

What is hemoglobin?
A. Lipid
b. Protein
c. carbohydrate
d. Nucleic Acid

Answers

proteinnnnnnnnnnnnnnn

Answer:

B. Protein

Explanation:

Main function is to transport oxygen from the lungs to tissues and to transport carbon dioxide from tissues to the lung.

importance of bacteria​

Answers

Explanation:

Bacteria are economically important as these microorganisms are used by humans for many purposes. The beneficial uses of bacteria include the production of traditional goods such as yogurt, cheese, and vinegar. Microbes are also important in agriculture for the compost and fertilizer production.

Could somebody please help me?



Select the correct answer

Which biogeochemical cycle includes the exoskeleton and shells of marine organisms as a reservoir?

A) carbon
B) nitrogen
C) sulfur
D) oxygen


Thank you! :)

Answers

Answer: The answer is Oxygen.

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Mac Cosmetic sells a lip gloss for $15.50, but it only costs the company $6 to make it what is the percentage markup on the lip gloss? How does the skeletal system interact with the nervous system?A the nervous system supplies the blood and oxygen to developing bonesB the nervous system supplies nutrients and minerals to developing bonesC the skeletal system controls the messages sent to the brain and spinal cordD the skeletal system provides protection for the brain and spinal cord If a motor is rated at 5.6KW, work done in 20minutes is equal to: 7. Which of these expressions are equivalent to 10x + 11? Select the three that apply. A. 5(2x + 10)+1 B. 7(x + 2) + 3x - 3 C. 3(3x + 4) + X-1 D. 2(6x + 4) + 2x + 5 E. 2(6x + 5) - 2x + 1 5 cucumbers for 5.95 find the unit price DuBois became a student at Fisk University. After he graduated, DuBois went to the distinguished HarvardUniversity to further his education. The school gave him the opportunity to study in Europe. He was able totravel across the continent and visit some of the top minds of his field. He was so steadfast in his studies that hebecame the first African American to receive a Ph.D. from Harvard. (A) After school, DuBois taught and workedfor many political and civil causes. He then moved to Georgia to start the first sociology department at AtlantaUniversity. (B) In Atlanta, DuBois became a pioneer for the civil rights of African Americans. (C) He wroteseveral books and organized many events to demonstrate against the segregation between whites and blacks.(D) Unlike Booker T. Washingtonanother activist who championed racial equalityDuBois believed in highereducation and culture for African Americans. In 1909, he helped organize the National Association for theAdvancement of Colored People, a group that encourages all races of people to support the civil rights ofAfrican Americans. DuBois worked as the publication director. For many years, he wrote a column for the mainpublication of the NAACP. His articles discussed the everyday struggles of African Americans and proposednonviolent solutions to these problems.When a paragraph contains two main ideas, it should be divided into two paragraphs. Choose the letter at the pointwhere the passage should be divided.A) AB) BC) CD) D HELP! What is equivalent to (8.4z+2.5)+(-3.7x+5 What is the name of a group of connected and related organisms?A. FlowB. SystemC. EnergyD. Matter English English question ASAP please answer this question correctly please answer this question correctly how did emperor commodus make sure he won his fights Which of the following is a solution for the equation x /6 = 7? A. x = 1 B. x = 6 C. x = 7 6 D. x = 42 In 4/4 time, how many beats would the dotted quarter note receive? What did Daniel Shays and his men protest in 1786A) the death penalty B) the use of debtors prisonsC) federal control of the judicial systemD) high taxes and heavy debtsPlz help me Where is the company Shengyren Based Write an equation in point-slope form that describes the line with a slope of -3 that contains the point (1,2) You are the VP of Marketing at Stauffer Foods and you learn that the puddings packaged desserts line from General Foods (GF) is available for acquisition. This division produces successful products like Pudding Pops, Instant Pudding, and Pudding in a Cup. You make some of assumptions about this line. Which assumption would you not make The width of a kitchen is 4.2 metres.Kitchen cupboard widths are 60cm. How many kitchen cupboard will fit in 4.2 metres?Enter the number only Read Sanjay's schedule. Use transitions to complete the story about his week. "The week is so busy!" Sanjay told his mom. " I have band practice. I have to volunteer at the animal shelter, but I have piano lessons. By I will be exhausted." 6. Which of these statements from the article is the BEST example of a claim?-I struggle daily with making sure my daughter does her homework.-American kids need homework.-I teach each topic in depth so that students understand and appreciate the information.