CAN SOMEONE HELP PLEASE
Homologous pairs separate in meiosis , and sister chromatids separate in meiosis .
Answer:
Homologous pairs separate in first round of meiosis or meiosis 1
However,
sister chromatids separate in second round of meiosis or meiosis 2.
ANSWER FAST PLEASE According to Dalton’s theory, why are carbon and oxygen differ.ent elements?
According to the Dalton's theory, carbon and oxygen are different elements because they are made up of different atoms which have different numbers of proton and neutrons.
What is Dalton's theory?John Dalton proposed his modern theory of atoms in 1803. He discovered atom, which is the smallest unit of particle. This theory is also known as the atomic theory of matter.
In this theory, he stated that every single atom of an element, such as sodium, is same as the other atoms of the same element. He also stated that the atoms of one element differ from the atoms of other elements. This theory is mostly found to be true. For example: A sodium atom is different from a carbon atom.
However, his theory was found to be found as the atoms present in the elements are found to be divisible into even smaller particles like protons, neutrons, and electrons.
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What is the term for changes in the internal or external environment that cause a response?
A. stimuli
B. signals
C. messages
D. nerves
Will give brainlest for quick and correct answer
Answer:
A
Explanation:
It is a detectable change in the physical or chemical structure of an organism's internal or external environment. Although stimuli commonly cause the body to respond, it is the CNS that finally determines whether a signal causes a reaction or not.
Answer:
Stimuli
Explanation:
In physiology, a stimulus (plural stimuli or stimuluses) is a detectable change in the physical or chemical structure of an organism's internal or external environment. ... Although stimuli commonly cause the body to respond, it is the CNS that finally determines whether a signal causes a reaction or not.
Most rocks on Earth began as which type of rock?
Answer:Well, rocks were originally sediments, which were compacted under high pressure. Igneous rocks formed when liquid magma or lava—magma that has emerged onto the surface of the Earth—cooled and hardened.
Explanation:
What is the hypothesis of this experiment
two effects of climate change on the environment
Answer:
various factors of climate change can effect the environment
Explanation:
1. extreme heat - droughts, bushfires
2. flooding effects infrastructure
3. rising in sea levels
When the population of rabbits falls to 400, what will be the population of foxes if the trend continues?
A) 400
B) 500
C) 600
D) 700
Answer:
400?
Explanation:
because if the foxs dont have food then they will starve and die as well
1. What is one way that humans may have a negative impact on environmental change? 2. What is one way humans may have a positive impact on environmental change?
Answer:a negative impact is global warming due to the over use of fossil fuels. a positive impact is the way we control the food chains and keep overpopulation from other species from happening.
Explanation: look above
an organism has a haloed number of 20. what is the organism's diploid number?
Answer:
The organism's diploid number is 40.
Explanation:
Haloed means half and Diploid means double of half. So in this case if it's haloed is 20, 20*2=40. The diploid number is 40.
When does the first quarter phase of the moon occur?
Select one:
a. three weeks after the new moon phase
b. one week after the full moon phase
c. two weeks after the third quarter phase
d. two weeks after the new moon phase
Answer:
l think
b. one week after the full moon phase
sunlight can be considered a food resource
Answer:
yes it can
Explanation:
cause it creates
Answer:
Depends. I mean, the sun is necessary for our survival, since it's the thing that allows for plants to grow. I guess you can consider it a food resource.
Populations of different species all living and interacting in the same area.
Which of the following is part of the biochemical cycle (A) Carbon tapped on the ocean floor. (B) Helium gas escaping into space (C) Lava flowing from an active volcano (D) Solar radiation traveling to earth
identify four types of information you learned about living things when you study biology
1. Was the restoration project effective? Explain why or why not, supporting your answer with information from your data tables and graphs. 2. Why was counting the number of species in the area important? In your answer, consider the effect a mangrove habitat has on biodiversity. 3. After five years, the average height of each mangrove species was also measured. Did this information help you better evaluate the success of the restoration project, or did it change your mind? Explain your reasoning.
Answer:
1- Yes the restoration was effective because the north beach seeds were replant and in 5 years there was almost 100% regrowth of mangroves. After five years, the average height of each mangrove species was also measured.
2- Yes the counting the number of species in the area was important because it helped figure out how much the storm damaged each beach and it showed how the animals were affected. The effect a mangrove habitat has on biodiversity is by giving animals a home, a place to sleep and shelter.
3- Yes, after five years, the average height of each mangrove species was also measured which helped realize that the restoration project was a success.
Googgles are worn during science experiments
Answer:
yes
Explanation:
So chemicals don't get in your eyes.
Answer:
goggles sre worn so that a person can be saved from any chemical bomb or side affects
Which of the following molecules supplies the main source of short-term energy used in cellular
respiration?
F) Enzymes
G) Carbohydrates
H) Lipids
J) Proteins
Answer:
g
Explanation:
its g because thats right may i have brainlyist i need it to upgrade
The molecules supply the main source of short-term energy used in cellular respiration is - G) carbohydrates.
All living organisms carry out cellular respiration in order to get energy for cellular processes. All biomolecules proteins, lipids, and carbohydrates provide energy by breaking down during this process. however, sugar molecules or carbohydrates are used to provide short-term and immediate energy in the form of ATP by cellular respiration.
Proteins -
During extreme starvation when all carbohydrates and fats in the body are used up.The respiratory quotient (RQ) of proteins - 0.83–0.9.Carbohydrates-
The major respiratory substrate is in form of glucose or carbohydrates in cells.The respiratory quotient (RQ) of carbohydrates - 1.Fats-
used only if carbohydrates are in short supply. It yields almost twice as much energy as carbohydrates generally do not use.The respiratory quotient (RQ) - 0.71Thus, carbohydrates like glucose and sucrose are probably the two most common organic molecules that organisms require to produce short-term energy from cellular respiration.
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What organelle works with cytoplasm
Answer:
Some of the most important organelles that cytoplasm contains are the ribosomes, mitochondria, proteins, the endoplasmic reticulum, lysosomes, and the the Golgi apparatus
hope this helps :)
Explanation:
if all the cells of a lion have the complete set of dna, why cant the leg bone cells ever become stomach cells? (grade 9)
Please help me with this task, it should be mini essay with own words
1) Identify an acid/base reaction that humans use in everyday life. Describe how the reaction
works and why it is beneficial to humans.
Answer:
An example of a base that humans use in day to day life is things such as cleaners, a strong base is beneficial to humans in this way because it can dissolve grease and protein. On the other hand acids are very important as well because strong acids can be found in the human stomach, we would not be able to digest food without this acid presence
Explanation:
Hope this helps!
What are the controlled variables in a cell
DNA replication occurs in the ____ phase of the cell cycle.?
Answer:
S phase! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! hope this helped
6. List and describe 8 part of prokaryote cells.
Answer:
Prokaryotes explanation
Explanation:
Prokaryotes are single-celled organisms that are the earliest and most primitive forms of life on earth. As organized in the Three Domain System, prokaryotes include bacteria and archaeans. Some prokaryotes, such as cyanobacteria, are photosynthetic organisms and are capable of photosynthesis.
Many prokaryotes are extremophiles and can live and thrive in various types of extreme environments including hydrothermal vents, hot springs, swamps, wetlands, and the guts of humans and animals (Helicobacter pylori).
Prokaryotic bacteria can be found almost anywhere and are part of the human microbiota. They live on your skin, in your body, and on everyday objects in your environment.
Prokaryotic Cell Structure
Bacterial Cell Structure
Bacterial Cell Anatomy and Internal Structure. Jack0m/Getty Images
Prokaryotic cells are not as complex as eukaryotic cells. They have no true nucleus as the DNA is not contained within a membrane or separated from the rest of the cell, but is coiled up in a region of the cytoplasm called the nucleoid.
Prokaryotic organisms have varying cell shapes. The most common bacteria shapes are spherical, rod-shaped, and spiral.
Using bacteria as our sample prokaryote, the following structures and organelles can be found in bacterial cells:
Capsule: Found in some bacterial cells, this additional outer covering protects the cell when it is engulfed by other organisms, assists in retaining moisture, and helps the cell adhere to surfaces and nutrients.
Cell Wall: The cell wall is an outer covering that protects the bacterial cell and gives it shape.
Cytoplasm: Cytoplasm is a gel-like substance composed mainly of water that also contains enzymes, salts, cell components, and various organic molecules.
Cell Membrane or Plasma Membrane: The cell membrane surrounds the cell's cytoplasm and regulates the flow of substances in and out of the cell.
Pili (Pilus singular): Hair-like structures on the surface of the cell that attach to other bacterial cells. Shorter pili called fimbriae help bacteria attach to surfaces.
Flagella: Flagella are long, whip-like protrusions that aid in cellular locomotion.
Ribosomes: Ribosomes are cell structures responsible for protein production.
Plasmids: Plasmids are gene-carrying, circular DNA structures that are not involved in reproduction.
Nucleoid Region: Area of the cytoplasm that contains the single bacterial DNA molecule.
Prokaryotic cells lack organelles found in eukaryoitic cells such as mitochondria, endoplasmic reticuli, and Golgi complexes. According to the Endosymbiotic Theory, eukaryotic organelles are thought to have evolved from prokaryotic cells living in endosymbiotic relationships with one another.
Like plant cells, bacteria have a cell wall. Some bacteria also have a polysaccharide capsule layer surrounding the cell wall. This is the layer where bacteria produce biofilm, a slimy substance that helps bacterial colonies adhere to surfaces and to each other for protection against antibiotics, chemicals, and other hazardous substances.
Similar to plants and algae, some prokaryotes also have photosynthetic pigments. These light-absorbing pigments enable photosynthetic bacteria to obtain nutrition from light.
Binary Fission
E. coli Bacterium Binary Fission.
E. coli bacteria undergoing binary fission. The cell wall is dividing resulting in the formation of two cells. Janice Carr/CDC
Most prokaryotes reproduce asexually through a process called binary fission. During binary fission, the single DNA molecule replicates and the original cell is divided into two identical cells.
Steps of Binary Fission
Binary fission begins with DNA replication of the single DNA molecule. Both copies of DNA attach to the cell membrane.
Next, the cell membrane begins to grow between the two DNA molecules. Once the bacterium just about doubles its original size, the cell membrane begins to pinch inward.
A cell wall then forms between the two DNA molecules dividing the original cell into two identical daughter cells.
Although E.coli and other bacteria most commonly reproduce by binary fission, this mode of reproduction does not produce genetic variation within the organism.
Prokaryotic Recombination
Bacterial Conjugation
False-color transmission electron micrograph (TEM) of an Escherichia coli bacterium (bottom right) conjugating with two other E.coli bacteria. The tubes connecting the bacteria are pili, which are used to transfer genetic material between bacteria. DR L. CARO/Science Photo Library/Getty Images
Genetic variation within prokaryotic organisms is accomplished through recombination. In recombination, genes from one prokaryote are incorporated into the genome of another prokaryote.
Recombination is accomplished in bacterial reproduction by the processes of conjugation, transformation, or transduction.
Capsule, cell wall, cell membrane, pilus, flagella, ribosomes, nucleoid, and plasmids are the parts of prokaryotic cells.
What are the parts of prokaryotic cells?Single-celled creatures known as prokaryotes are the earliest and most basic living forms on Earth. Bacteria and archaeans are prokaryotes, which are classified according to the Three Domain System. Some prokaryotes are photosynthetic creatures and can do photosynthesis, such as cyanobacteria.
Prokaryotic bacteria are ubiquitous and comprise a significant portion of the human microbiome. They exist on your skin, inside your body, and on commonplace items in your surroundings.
Bacteria, as a sample prokaryote, its cells have the following organelles and structures:
Capsule: Found in some bacterial cells, this extra outer layer aids in moisture retention, prevents the cell from being swallowed by other organisms, and aids the cell's adherence to surfaces and nutrients.Cell Wall: The bacterial cell's cell wall serves as both a protective barrier and a structural component.The cell membrane: also known as the plasma membrane, protects the cytoplasm of the cell and controls how substances enter and exit the cell.Pili (Pilus singular): Surface-mounted, hair-like structures that connect to other bacterial cells. Fimbriae, which have shorter pili, aid bacterial attachment to surfaces.Flagella: Long, whip-like protrusions called flagella assist cells in moving about.Ribosomes: Ribosomes are the parts of cells that make proteins.Nucleoid: They are the part of the cytoplasmic region that carries a single molecule of bacterial DNA.Cytoplasm: Cytoplasm is an organic material that resembles a gel and is mostly made of water. It also includes enzymes, salts, and numerous cell components.Therefore, the capsule, cell wall, cell membrane, pilus, flagella, ribosomes, nucleoid, and plasmids are the parts of the prokaryotic cells.
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Which of the following is NOT a subatomic particle of an atom?
Neutron
Nuclear wall
Proton
Electron
Answer: nuclear wall
BRAINLIEST. Do fish lay eggs?
Answer:
yes
Explanation:
fishes lay thousands of eggs at one time in fact!!!
Answer:
NO
Explanation: Fish carry there children in a womb. the fish eggs you see in recipes are from cutting a fish open and taking them.
What are three clues that something you are reading is false
1. No credible source
2. Check if its a biased answer
3. Examine evidence
13. List the properties that ocean water has due to the fact that it contains salt
I
Answer:
sodium chloride, magnesium, sulfate, calcium, potassium, as well as dissolved gases, including nitrogen, oxygen, and carbon dioxide.
Explanation:
Ocean water little a lower freezing point, and higher electrical conductivity due to salt.
What is ocean water?Seawater has special qualities such as being salted, having a little lower freezing point than freshwater, being significantly denser, having a lot higher electrical conductivity, and being slightly basic.
The two ions that are most often found in seawater are sodium and chloride. Over 90% of the dissolved ions in saltwater are made up of chloride and sodium.
Seawater has a salinity of around 35 parts per thousand of salt. 96.5 percent of seawater is made up of pure water, 2.5 percent salt, and minor quantities of dissolved inorganic and organic compounds.
Therefore, due to salt ocean water has higher electrical conductivity and other properties.
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What is the process by which heat energy gets to Earth from the Sun
Raditation
Answer:
Radiation is the transfer of heat energy through space by electromagnetic radiation.
Explanation:
Most of the electromagnetic radiation that comes to the earth from the sun
What is the difference between the velocity and the speed of an object?
-:---:--
Velocity is the change in distance over time, while speed is the change in velocity overtime.
Velocity has a direction associated with it, while speed has no specific direction.
Velocity has no direction associated with it, while speed has a specific direction.
Velocity is the change in speed over time, while speed is the change in distance over time.