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.
Why does the process of meiosis create more genetic variety than the process of mitosis?
Answer:
Meiosis creates more genetic variety than the process of mitosis because meiosis involves two people but in mitosis its just a replication of the cell.
(Sorry if this isn't correct I just thought of it from the top of my head)
Explanation:
Which human activity is correctly paired with the greenhouse gas that it increases?
Answer:
sewage treatment and nitrous oxide.
Explanation:
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:)
This food web describes feeding relationships in a tropical community.
boa constrictor
beetle -
coati
poison dart frog
sloth
strangler fig
fungus
fruit bat
If an invasive species of beetle enters this community, which change is most
likely to happen?
In the given food web if the beetle that is invasive enters the community, it will result in an increase in competition for sunlight and space among plants.
What is an invasive species?The non-native species that enter the ecosystem can be any organism including amphibians, birds, insects, etc referred to as invasive species.
In the given food web if the beetle that is invasive enters the community, it will result in an increase in competition for sunlight and space among plants.
Thus, the scenario will show an increase in the competition for sunlight and space among plants.
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How is cancer related to mutations? How is it related to the cell cycle?
Answer:
Cancer is related to the cell cycle bc, cancer cells mutate. Cancer is unchecked cell growth. Mutations in genes can cause cancer by making cell division rates go up faster or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor
Explanation:
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The chart shows characteristics of two groups of reptiles.
Which headings correctly complete the chart?
X: Turtles
Y: Crocodilians
X: Crocodilians
Y: Turtles
X: Snakes
Y: Turtles
X: Crocodilians
Y: Snakes
Answer:
X: Crocodilians
Y: Snakes
Explanation:
Answer:
X: Crocodilians
Y: Snakes
Explanation:
USE PAPER TO MAKE YOUR PUNNETT SQUARE. In humans, black hair is
incompletely dominant over blond. The blend of these traits is brown hair. Write
out the genotypes to the three phenotypes in your answer. Example: Black =
Blonde =
Brown = NEXT, cross a heterozygous parent
and a blond-haired parent. Give the genotypic and phenotypic ratios of the
offspring. *
What is fertilization in the process of reproduction?
A. The formation of a placenta
B. The joining of an egg and a sperm
C. Sexual intercourse
D. Diploid cell differentiation
What is a vaccine made out of?
Answer: Vaccines are made from a protein or other small pieces taken from a virus or bacteria.
Explanation: A vaccine works by training the immune system to recognize and combat pathogens, either viruses or bacteria. Meaning my answer is correct.
Answer:
A vaccine is made of dead or inactive versions of the pathogen. A vaccine is usually injected into the body, the first thing that will happen is that the white blood cells recognise that there is a foreign item within the body so the white blood cells will produce antibodies. This means that in the future if the virus enters your body again, your immune system will be able to quickly defend of the virus since the made the immune system produce antibodies
Explanation:
Which feature separates watersheds?
basins
bays
ridges
rivers
Answer:
Which feature separates watersheds? C.ridges
A.basins
B.bays
C.ridges
D.rivers
Explanation:
Ridges feature separates the watersheds. Therefore, the correct option is C.
What are Watersheds?A watershed is a piece of land that directs water into a particular body of water. A watershed exists for every body of water. Rainfall and melting are channelled into rivers and streams by watersheds.
Lakes, bays, and oceans are among the bigger bodies of water that these smaller ones flow into. Water travels across the landscape with the assistance of gravity.
The area of land known as a watershed is responsible for directing precipitation and snowfall into creeks, streams, and rivers, and ultimately outflow places like reservoirs, bays, and the ocean.
A small mountain creek's watershed may only be a few square meters in size. Some watersheds are very large and typically cover numerous smaller ones. Ridges separates the watersheds
Therefore, the correct option is C.
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whats primary succession and when does it occur
Answer:
Primary succession is ecological succession that begins in essentially lifeless areas, such as regions in which there is no soil or where the soil is incapable of sustaining life (because of recent lava flows, newly formed sand dunes, or rocks left from a retreating glacier).
Which statement best describes evolution?
Species have changed over time.
Traits acquired during a lifetime are passed to offspring.
Earth’s organisms have not changed over time.
All of Earth’s organisms were formed at the same time.
Answer:
Species have changed over time.
Explanation:
pls help!! What is it that acts as a template for making RNA?
Answer:
Transcription is the process in which a gene's DNA sequence is copied (transcribed) to make an RNA molecule.
Explanation:
Transcription uses one of the two exposed DNA strands as a template; this strand is called the template strand. The RNA product is complementary to the template strand and is almost identical to the other DNA strand, called the nontemplate (or coding) strand.
Which statement best describes a hypothesis?
O A. It must be true,
B. It must be testable,
O C. It must be a theory.
O D. It must be permanent.
What is the responsibility of a scientist?
O A. To study the natural world carefully
B. To influence voters to make good choices
C. To run governments as wisely as they can
D. To earn as much money as they can
SUBMIT
Answer:
A
Explanation:
It requires scientists to conduct and communicate scientific work for the benefit of society, with excellence, integrity, respect, fairness, trustworthiness, clarity, and transparency. ... Responsibilities of All Scientists a. Excellence in the Conduct of Research i.
Hope this helps!!!
Answer:
a.
Explanation:
just took the test
Which is a pollutant associated with high-tech gadgets in landfills?
Answer:
Lead is the major pollutants of high-tech gadgets, occupying 40%, while other metals 75%.This is because Pb forms lager components of these gadgets.For example a desktop computer contains about 10 pounds of Pb.
The lead to recycle these material to prevent pollution is important.
Explanation:
Answer:
Heavy metals such as plumb, mercury, arsenic, etcetera.
Explanation:
There are many heavy metals used in high-tech gadgets, such as mercury, cadmium, arsenic, among others.
The pollution produced by industries, technology, agriculture, mining industry, and the indiscriminate use of fertilizers and other chemicals on land is increasing the amounts of heavy metals. These substances are incorporated in rivers, lakes, underground water, vegetables, and animals. These pollutants alter the trophic chain
sustainability creating potential risks in nature and societies, because of the problems to human and animal health.
In a Venn diagram, the separate circles contain characteristics unique to each item being compared and the intersection contains characteristics that are common to both items being compared. Abi is working on a Venn diagram comparing theories and laws.
Which can he place in the intersection?
“based on a single hypothesis”
“can be changed”
“factual statement”
“based on repeated experimentation”
what is the two-word term for tracking a disease by gathering data on the movements and interactions of someone infected?
Answer:
Explanation:
Diagnosis - A disease must be diagnose this can be done by group of expertise. They diagnose one to two persons with the disease asking them questions about their state of health, how they were expose to the illness. This enable them have enough evidence as regarding the disease.
Signs and symptoms - signs are traces to a disease it is determined by an experts while the symptoms are the abnormalities or changes that indicate the disease.
Kevin wants to lower his carbon footprint. What option should he choose?
A. eat less food
B.drink less water
C. carpool with his work colleagues
D move out to the country
Answer:
c carpool with his work buddies
Answer:
c
Explanation:
how does the bone matrix differ from the matrix of cartilage
Answer:
Cartilage and Bone are specialized forms of connective tissue. They are both made up of cells embedded in an extracellular matrix. Cartilage is thin, avascular, flexible and resistant to compressive forces. Bone is highly vascularize, and its calcified matrix makes it very strong.
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Living things that are well adapted to their environment survive and reproduce. Those that are not well adapted don’t survive and reproduce. An adaptation is any characteristic that increases fitness, which is defined as the ability to survive and reproduce. What characteristic of the mice is an adaptation that increased their fitness?
The tendency of an organism to reproduce and survive in the environment in which they thrive is termed as fitness of that organism.
• The mice are considered to be the second most successful mammal on the planet today.
• Mice possesses the tendency to change with the stresses and environment in which they thrive.
• Due to their close association with humans, house mice possess the tendency to live in very dry or hot conditions or in very cold conditions where they could not survive alone.
• The mice possesses the tendency to reproduce at a very high rate, thus, there are always individuals, which can survive.
• They have the tendency to sense their surroundings like other mammals, they even possess good hearing and vision.
• They have large cup shaped ears, which assists them to sense vibrations of sound.
• They also possess good sense of smell and whiskers that helps them to feel air movements and feel surface textures.
Thus, mice are equipped with several elements that helps them to adapt in the environment in which they live, that is, have increased fitness level.
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What cell structure is responsible for regulating all cellular activities?
Choose 1 answer:
A. Nucleus
B. Mitochondria
C. Lysosome
D. Golgi body
Answer:
Let me know if this is right Answer: Nucleus
Explanation:
This organelle known as the Nucleus has two major functions: it stores the cell's hereditary material, or DNA, and it coordinates the cell's activities, which include growth, intermediary metabolism, protein synthesis, and reproduction (cell division). Only the cells of advanced organisms, known as eukaryotes, have a nucleus.
Answer:
Lysosome
Explanation:
The lysosome is the cell’s recycling center. These organelles are spheres full of enzymes ready to hydrolyze, (chop up the chemical bonds of) whatever substance crosses the membrane, so the cell can reuse the raw material. These disposal enzymes only function properly in environments with a pH level of 5, two orders of magnitude more acidic than the cell’s internal pH level of 7. Lysosomal proteins only being active in an acidic environment acts as safety mechanism for the rest of the cell - if the lysosome were to somehow leak or burst, the degradative enzymes would inactivate before they chopped up proteins the cell still needed.
If you look up in to the sky on a clear,dark night you will see many stars.Put an X next
to each statement that describes the stars that are in the night sky.
A. Our Sun is a star.
B. Stars move across the night
sky.
C. Stars have nomass.
I. Stars eventually become
supernovae andexplode.
J. Youseeastarasitwaswhen
light left it, not as it is now.
D.All stars are the same
brightness.
K. Stars live forever.
L. Stars are very far away.
E. The inner core of a star is solid. M. Stars are larger than planets.
F. It is common for two stars to N. Stars twinkle.
orbit each other.
G. Stars are in galaxies.
O. Stars are the same color but
different temperature
g.
f.
n.
L.
m.
a.
b.
i.
should be right ♡
Which of the following are accessory organs within the digestive system? (please select ALL that apply) *
Stomach
Large Intestine
Liver
Pancreas
Rectum
all of them are the part of digestive system
Liver and pancreas are the accessory organs within the digestive system.Thus, the correct options are liver and pancreas.
The human digestive system is made up of the gastrointestinal tract and the accessory organs which are needed for digestion . Digestion involves the breakdown of food into smaller parts, until they the food is absorbed and assimilated into the body. The process of digestion takes place in three stages: the cephalic phase, the gastric phase, and the intestinal phase.
The primary organs of the digestive system include organs like stomach,large intestine and rectum.Thus, the accessory organs within the digestive system are liver and pancreas.
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Explain what happens when infared radiation reaches earth?
how has climate change affected ocean levels
Answer:
Climate change has caused ocean levels to rise higher.
Explanation:
1. What can you find out from a model of seed?
A.The size of the seed
B.The shape of the seed
C.The structure of the seed
2. What causes a bee to move pollen?
A.The pollen is light and sticky.
B.The pollen has structures like wings.
C.The pollen has hooks that catch onto the bee.
Guys plssss help me with this...
PLZ I REALLY NEED HELP: Give one piece of evidence from the eruption of Mount St. Helens that shows that geologic processes can occur rapidly.
Answer:
Explanation:
The 1980 Mount St. Helens eruption was the most destructive in U.S. history. Fifty-seven people died, and thousands of animals were killed, according to USGS. More than 200 homes were destroyed, and more than 185 miles of roads and 15 miles of railways were damaged
Answer:
USGS scientists recount their experiences before, during and after the May 18, 1980 eruption of Mount St. Helens. Loss of their colleague David A. Johnston and 56 others in the eruption cast a pall over one of the most dramatic geologic moments in American history. Stephen M. Wessels, U.S. Geological Survey(Public domain.) Detailed Description USGS scientists recount their experiences before, during and after the May 18, 1980 eruption of Mount St. Helens. Loss of their colleague David
Explanation:
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The Fast Plants® shown below follow the same genetic rules as the plants in the Gizmo. What is wrong with this picture?
Answer:
A
Explanation:
The genotypic mix of the two genes, or alleles, that make up an expressed trait is what causes it. Additionally, a specific gene produces a distinct protein that establishes an individual's physical traits. This is how traits are controlled by genes. Thus, option A is correct.
What is the effect of genetic rules in the Gizmo?The genotype, or set of genes an organism acquired from its parents, is ultimately responsible for the qualities that creature manifests. Each chromosome in an animal has two copies, one from each parent.
Cloning and fingerprinting are two potential applications for DNA-based identification technology.
Device Warm-Up DNA profiling compares more than just one person's full genome to another. Instead, only one specific section of the DNA is compared.
Therefore, parent 1 plant is wrong in the picture.
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Describe the smell, color, and temperature of the contaminated water
Echolocation is an adaptation bats use to _______.
a.
hunt insects in flight
b.
locate flowering plants
c.
find warm places for hibernation
d.
all of the above
Please select the best answer from the choices provided
A
B
C
D
Answer:
D
Explanation:
Bats use echolocation to
navigate when hunting. foraging for food, and looking for places to roost.