Describe what changes were made to historical cell theory and explain why these changes were
made.

Answers

Answer 1
Three scientists are credited with the development of cell theory. Matthias Schleiden observed that all plants were made of cells; Theodor Schwann observed that all animals were also made of cells; and Rudolf Virchow observed that cells only come from other cells. The cell was first discovered and named by Robert Hooke in 1665. He remarked that it looked strangely similar to cellula or small rooms which monks inhabited, thus deriving the name.

Related Questions

Does mitosis or meiosis occur more frequently in your body? Explain your answer

Answers

Answer:

Mitosis

Explanation:

Meiosis is the splitting of sex cells which happens during reproduction. Mitosis is the splitting of body cells in order to make more body cells. Mitosis is how your body grows, therefore it occurs more frequently because the body is not constantly reproducing.

In the human body, mitosis occurs more frequently than meiosis. Mitosis is a type of cell division that happens in somatic cells, which are non-reproductive cells.

It is responsible for growth, repair, and maintenance of tissues in the body. On the other hand, meiosis occurs only in reproductive cells, such as sperm and egg cells, and is involved in the formation of gametes for sexual reproduction.

Here is a step-by-step explanation:

1. Mitosis: Mitosis is a process where a single cell divides into two identical daughter cells. It consists of several stages: interphase, prophase, metaphase, anaphase, and telophase. During interphase, the cell grows, replicates its DNA, and prepares for division.

Then, in prophase, the DNA condenses into chromosomes, and the nuclear membrane breaks down. In metaphase, the chromosomes align in the middle of the cell. Next, in anaphase, the chromosomes separate and move to opposite ends of the cell. Finally, in telophase, two nuclei form, and the cell divides into two daughter cells.

2. Meiosis: Meiosis is a specialized type of cell division that produces gametes with half the number of chromosomes as the parent cell. It involves two rounds of division, resulting in the formation of four haploid cells. Meiosis consists of two main stages: meiosis I and meiosis II.

In meiosis I, the homologous chromosomes pair up, exchange genetic material in a process called crossing over, and then separate, reducing the chromosome number by half. Meiosis II is similar to mitosis, as the sister chromatids separate and move to opposite ends of the cell. The end result is the formation of four genetically unique haploid cells.

Although both mitosis and meiosis are essential for different purposes, mitosis occurs more frequently in the body because it is involved in the growth, repair, and maintenance of tissues.

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someone help pleaseee

Answers

Answer:

option b i think so i think its correct

Why was "interphase" given that name? What stage in your life would be comparable to
Interphase in a cell's life?

Answers

Answer:

"Interphase was formerly called "the resting phase,"

Explanation:

The cell in  'interphase' is not rather "resting" but preparing for later cell division.

Does anyone know this!?

Answers

Answer: The first one

Explanation:

The first one :)




Explanation:

How do cells with the same set of DNA become a wide variety of specialized cells?

Answers

Answer:

Cellular differentiation

Explanation:

I think this is it. In cellular differentiation a cell changes from one cell to another so this might have something to do with this

Which microscope is often used to view metal surfaces?
scanning electron microscope
scanning tunneling microscope
transmission electron microscope
compound light microscope

Answers

The answer is scanning tunneling microscope

Answer:

scanning tunneling microscope

Explanation:

Microscopes used to view metal surfaces.

HElp I Know it’s Late At nigHt but this is due soon


Remember I NEDD TWO NOT ONE TWO AnSWErS

Answers

Answer:

pretty sure it's a and b

I believe it’s b and d

1. Is genetic modification a helpful application of technology that makes plants resistant to pests and disease while improving nutritional value?
2. Is genetic modification an unnatural tinkering with our food supply that lacks sufficient regulation and oversight?

Answers

Answer:

Yes genetic modifications is a helpful application of technology that makes plants resistant to pests and disease while improving nutritional value

Explanation:

plz give me brainiest

what are products of the krebs cycle

Answers

Answer:

GTP.

3 NADH.

FADH2, which is converted to UQH2 in the presence of coenzyme Q (ubiquinone)

2 CO2 (carbon dioxide)

In vesicular transport, __________ transport materials into and out of the cell using _______.

Answers

Endocytosis and exocytosis transport materials into and out of the cell using vesicles.

Endocytosis is called the process by which cells incorporate into them molecules, large or small, which are covered by the formation of a vesicle that detaches into the cell, forming phagocytic vesicles.

In exocytosis, the proteins or molecules produced in the endoplasmic reticulum are wrapped in a vesicle towards the Golgi apparatus, where they are released to be used by other cells or by the body in different processes.

Therefore, we can conclude that exocytosis and endocytosis are the biological processes responsible for the transport of particles and substances into and out of the cell.

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Answer:

Vesicles, Energy

Explanation:

After a substrate binds to an enzyme,

Answers

Answer: The induced fit model states an substrate binds to an active site and both change shape slightly, creating an ideal fit for catalysis. When an enzyme binds its substrate it forms an enzyme-substrate complex. ... The enzyme will always return to its original state at the completion of the reaction.

it forms an enzyme-substrate complex

Define the following types of sexual reproduction: Binary fission, budding. fragmentation, parthenogenesis​

Answers

Answer:

Binary fission-Binary fission, asexual reproduction by a separation of the body into two new bodies. In the process of binary fission, an organism duplicates its genetic material, or deoxyribonucleic acid (DNA), and then divides into two parts (cytokinesis), with each new organism receiving one copy of DNA.

Budding-Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site. The small bulb-like projection coming out from the yeast cell is called a bud.

Fragmentation-Fragmentation in multicellular organisms is a form of asexual reproduction in which an organism is split into fragments. Each of these fragments develop into matured organism, full grown individuals that are genetically and morphologically identical to their parents. 

Parthenogenesis-

Parthenogenesis is a form of reproduction in which an egg can develop into an embryo without being fertilized by a sperm. Parthenogenesis is derived from the Greek words for “virgin birth,” and several insect species including aphids, bees, and ants are known to reproduce by parthenogenesis.

Explanation:

Hope this helps u

Crown me as brainliest:)

Binary fission is defined as the process of asexual reproduction by a separation of the body into two new bodies. In the process of binary fission, an organism duplicates its genetic material, or deoxyribonucleic acid (DNA), and then divides into two parts (cytokinesis), with each new organism receiving one copy of DNA.

What is budding?

Budding has been defined as type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site. The small bulb-like projection coming out from the yeast cell is called a bud.

Fragmentation has been defined as the in multicellular organisms is a form of asexual reproduction in which an organism is split into fragments. Each of these fragments develop into matured organism, full grown individuals that are genetically and morphologically identical to their parents.

Parthenogenesis has been defined as the form of reproduction in which an egg can develop into an embryo without being fertilized by a sperm. Parthenogenesis has been derived from the Greek words for pure and several insect species including aphids, bees, and ants are known to reproduce by parthenogenesis.

Therefore, Binary fission is defined as the process of asexual reproduction by a separation of the body into two new bodies.

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Which of the following is not a natural cause of extinction?
a.competition due to overpopulation
b.introduction of non-native species
c.catastrophic events
d.disease​

Answers

Answer:

Introduction of Non-native species would be the answer. ( B )

Explanation:

Now let's break it down.

A. Competition due to overpopulation

Competition due to overpopulation, as competition of resources rises, species will fight among each other, and slowly, population will go down. But I don't see the reason of why it would cause an extinction... perhaps a decrease of population. See, once populations starts decreasing, resources will increase. And ONCE resources increase, populations starts increasing, and there goes competition. Resources decreases, populations decreases, and the whole process repeats. So I'm not quite sure whether it will cause extinction of a species.

B. Introduction of Non- native species.

So what does it mean by Non-native species?

It means that species that have no effect and doesn't exist in the ecosystem. So that will definitely not affect the population whatsoever.

C. Catastrophic Events

Well, common sense. Many people died of tsunamis, tornado and other natural disasters every year. Too many disasters can cause the population to cease.

D. Disease

This we can relate, especially the Coronavirus. Many humans died of the deadly virus. Same goes to animals. If a disease gets too deadly, population will decrease and drive the species to extinction.

So, the Answer would be B.

HOPE THIS ANSWER HELPED :)

Among the given options, the one that is a natural cause of extinction would be:

b). Introduction of non-native species.

'Non-native species' are described as the species that are introduced to an ecosystem different from its native habitat.

These species are severe threat to the existing ecosystem of the new habitat including plants, animals, aquatic life, etc. where they've been shifted.

Thus, it is not a natural cause as these species are not naturally introduced but the humans introduce them.

They turn so dominating to get their food and other things that it lead not only harmful but also lead to the extinction of the native species.

Hence, option b is the correct answer.

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I need help with this IMMEDIATELY I will give 20 points and give a brainliest answer if someone answers it. PLZ HELP ME NOW!!! WITH BIOLOGY!!!

Answers

I only know part B and it is sexually reproducing cells need both genders and Asexual cells only need one

Which statement below best describes the role of mutations in evolution by natural selection?
A Mutations increase the genetic variation within a population, and each of the variants provides an advantage under different circumstances
B Mutations increase the genetic variation within a population, and some of the variants may provide an advantage to individuals over time
C Mutations help stabilize the genetic variation within a population, and only one or two variants generally provide an advantage to individuals.
D Mutations help reduce the genetic variation within a population, and thus increasing the rate that new adaptations develop.

Answers

Answer:

B. Mutations increase the genetic variation within a population, and some of the variants may provide an advantage to individuals over time

The role of mutations in evolution by natural selection is option b. Mutations increase the genetic variation within a population.

Role of mutation in evolution:

The mutation is significant as the first step of evolution since it developed the new DNA sequence for the specific gene that developed the new allele.

Also, at the same time, it rise the genetic variation within the population also it provides as an advantage to individual

hence, the option b is correct.

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What is the slope of 2/3

Answers

Answer:

Using the slope-intercept form, the slope is 0 .

Explanation:

Hope this helps!! :)

The graph below shows the speed of a ball rolling over uneven ground.
Forces, Motion, & Speed (6.8B,C&D):Question 7
According to the graph, at which time interval was the ball moving the
FASTEST?
Speed of Ball and Distance Traveled
10
8
Select one: -
Distance (meters)
between seconds 3 and 4
between seconds 0 and 1
Time (seconds)
between seconds 4 and 5
O
between seconds 1 and 2

Answers

Answer:

It is Distance (meters)

between seconds 3 and 4

Explanation:

I had this on my test last week

which type of solution is ideal for carrying out cell functions in the body

Answers

Answer:

Blood Cells

Explanation:

The isotonic solution allow the cells to move water and nutrients in and out of the cells. This is necessary for blood cells to perform their function of delivering oxygen and other nutrients to other parts of the body.

Answer: Blood cells

Explanation: The isotonic solution allow the cells to move water and nutrients in and out of the cells. This is necessary for blood cells to perform their function of delivering oxygen and other nutrients to other parts of the body.

WILL VOTE BRAINLIEST FOR THE BEST ANSWER
What do you know about deserts, grasslands, or tundra biomes?

Answers

Answer:

this is what i do when i bored :P

Explanation:

A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to the processes of denudation. Grasslands are areas where the vegetation is dominated by grasses. However, sedge and rush can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur naturally on all continents except Antarctica and are found in most ecoregions of the Earth. In physical geography, tundra is a type of biome where the tree growth is hindered by low temperatures and short growing seasons. The term tundra comes through Russian тундра from the Kildin Sámi word тӯндар meaning "uplands", "treeless mountain tract".

Which structures shown in the Figure make up the ADP molecule?
А
B
с
D
A, B and C
C and D
A, B, C, and D
A and B

Answers

Answer: A,B and C

Explanation

30. How many calories would it take to raise a persons body temperature 3 degrees if their
mass is 79545 grams? (show your work)

Answers

Answer:

2000000 heat calories.

Explanation:

Explanation:

The heat capacity of water is 1 calorie for 1 gram raised 1 degree C

or 4.186 joules of energy for 1 gram raised 1 degree C ( or

K

o

)

l Kg = 1000 grams so

100

K

g

×

1000

g

1

= 100000 grams of water.

It takes 10 000 calories to raise 10 000 grams of water 1 degree

so 20 degrees x 10 000 grams = 2 000 000 calories.

The same type calculations can be done for heat in joules

10, 000 grams x 4.186 joules x 20 degrees. = 8372000 joules.

which of the following happens to a cell in hypotonic solution
A- The cell gains water and expands
B- The cell stays the same
C- The cell loses water and shrivels
D- Water moves out of the cell

Answers

Answer:

In a hypotonic solution, the solute concentration is lower than inside the cell. If the water continues to move into the cell, it can stretch the cell membrane to the point the cell bursts (lyses) and dies

Hypotonic solutions have lower solute concentrations than cells. If water keeps entering the cell, it can strain the membrane until the cell bursts and dies. Therefore, option (A) is correct.

What is hypotonic solution?

In comparison to another solution, a hypotonic solution will have a lower solute concentration because of its composition. Without another solution to compare it to, it is impossible to determine whether a solution is hypotonic, isotonic, or hypertonic. A solution is said to be hypotonic when it has a relatively low concentration of solutes in comparison to another solution.

As a consequence of this, the solute concentration is lower in a hypotonic solution than it is inside of the cell. If the water continues to enter the cell, it has the potential to stretch the cell membrane to the point where the cell lyses and dies as a result of the rupture.

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what are two organisms in the food web that have a predator-prey relationship? i need examples

Answers

Answer:

Some examples of predator and prey are lion and zebra, bear and fish, and fox and rabbit. The words "predator" and "prey" are almost always used to mean only animals that eat animals, but the same concept also applies to plants: Bear and berry, rabbit and lettuce, grasshopper and leaf.

Some examples of predator and prey are lion and zebra, bear and fish, and fox and rabbit.

What do you mean by predator-prey relationship?

In the predator prey relationship, one species is feeding on the other species. The prey species is the animal being fed on, and the predator is the animal being fed. The predator prey relationship develops over time as many generations of each species interact.

Predator and prey populations cycle through time, as predators decrease numbers of prey. Lack of food resources in turn decrease predator abundance, and the lack of predation pressure allows prey populations to rebound.

The relationships between predators and prey play an important role in structuring ecological communities, with predators influencing the dynamics of their prey in ways that cascade through ecosystems.

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How does the ozone layer affect life on Earth?
a.
causes respiratory illness
b.
increases photosynthesis in plants
c.
causes damage to living tissue
d.
filters out harmful ultraviolet radiation

(30 points!)

Answers

d is the correct answer

Answer:

(D) filters out harmful ultraviolet radiation

Explanation:

edg 2020

**Answer all 3 for brainliest**
Can you explain the atomic reactions that occur in nuclear fusion?

Can you explain what a photon is and how it is made?

How does this impact life on Earth?

Answers

Answer:

Nuclear fusion is a reaction in which two or more atomic nuclei are combined to form one or more different atomic nuclei and subatomic particles (neutrons or protons). The difference in mass between the reactants and products is manifested as either the release or the absorption of energy.

The photon is a type of elementary particle. It is the quantum of the electromagnetic field including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force. Photons are massless, so they always move at the speed of light in vacuum,

photons are in light so yeah

I need help on this too

Answers

First one and yes ik it is

3. What variables of your test subjects were necessary to input into the calculator?
Which variables seem to have the LEAST effect on a person's vital capacity?

Answers

Answer:

????????????????????????

Which of the following is NOT a monomer?
A. an amino acid
B. a monosaccharide
C. a protein
D. a nucleotide

Answers

A. hope this helped

what is the income source obtained from silk worm?

Answers

Answer:

silk

Explanation:

Va deaner tish cleans another big fish of ns parasites, when type of symbiotic
relationship is this?
death
Paraitism
Commensalism
Mutualism

Answers

This is commensalism (the fish are benefiting from each other)
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