Answer:
The four major functions of the cardiovascular system are:
1. To transport nutrients, gases and waste products around the body.
2. To protect the body from infection and blood loss.
3. To help the body maintain a constant body temperature.
4. To help maintain fluid balance within the body.
Explanation: So, overall It plays an important role in helping the body meet the demands of activity, exercise, and stress. It also helps maintain body temperature, among other things. Hope this helps ^-^.
why is fertilizer essential
Answer:
Fertilizer is essential in agricultural practice because it adds the needed nutrients to the soil.
Explanation:
Given that each successful cultivation of crops leads to the removal of nutrients in the soil. To retain the level of nutrients in the soil so the plants can germinate extremely well. There is a need to add fertilizers to the soil.
Therefore, fertilizers are essential because "it adds the needed nutrients to the soil." Thereby retaining and improving the harvest level of plant crops.
Answer this for 2 brainest :)
About 3/4 of the matter that makes up the universe is the element _______________, while the remaining 1/4 is mostly the element _______________.
A rabbit population is affected by parasitism and disease, both of which are density-dependent limiting factors. Which statement describes the effects of
parasitism and disease on the rabbits?
O A. Parasites and disease weaken or kill a constant percentage of the rabbit population, regardless of its density.
o B. As the density of the rabbit population increases, parasites and disease weaken or kill a greater percentage of rabbits.
O
C. As the density of the rabbit population increases, parasites and disease weaken or kill a lesser percentage of rabbits.
o
D. Parasites and disease weaken or kill mostly the youngest and oldest rabbits, and not the rabbits of average age.
Answer:
The correct answer is - As the density of the rabbit population increases, parasites and disease weaken or kill a greater percentage of rabbits
Explanation:
Disease and parasitism are types of density-dependent limiting factors that affected or influenced by the change in the population density, In this case, parasitism and disease affect the population of the rabbits.
If the density of the rabbit population increases the both density depending on the limiting factors parasites and disease weaken or ill a greater numbers of rabbit population.
4. If a mutation blocked the function of the signal recognition particle, making it unable to bind signal sequence, what would result
Answer:
All proteins would be translated in the cytoplasm
Explanation:
The signal recognition particle (SRP) is a cytoplasmic RNA-protein (ribonucleoprotein) complex whose primary role is to target signal peptide‐bearing proteins to the plasma membrane in prokaryotes and to the endoplasmic reticulum in eukaryotes. In eukaryotic organisms, SRP binds to the signal sequence of the protein when the growing polypeptide chain emerges from the ribosome in the cytoplasm. This binding is key because it results in a slowing of translation, a mechanism known as elongation arrest. Therefore, without a functional SRP, elongation arrest would not occur and proteins would be translated on free ribosomes in the cytoplasm.
How many polar bodies are formed in a female at the end of meiosis ?
Answer:
Three polar bodies may form during oogenesis. These polar bodies will not form mature gametes. Conversely, four haploid spermatids form during meiosis from the primary spermatocyte.
Explanation:
Hope this helps :)
Which of the following has a positive charge and a mass of one amu?
Answer:
a proton
Explanation:
It is found in the nucleus of an atom and has a positive charge with 1 atomic mass unit
what are the effects of mutations
Explanation:
When a mutation alters a protein that plays a critical role in the body, it can disrupt normal development or cause a medical condition. A condition caused by mutations in one or more genes is called a genetic disorder. In some cases, gene mutations are so severe that they prevent an embryo from surviving until birth.
Answer:
. Positive change to the organism
. Negative change to the organism
Explanation:
How do the hypotheses of ""phyletic gradualism"" and ""punctuated balance"" explain the process of lineage diversification?
Answer and Explanation:
Phyletic gradualism and punctuated balance are speciation theory. They are effective models for understanding macroevolution. Both define the rates of speciation. The phyletic gradualism model theorizes that most speciation is gradual, slow, and uniform, such as a black and yellow butterfly. When a butterfly is born, its color is yellow and orange, making it hard to see. The black and yellow butterflies become extinct over a long period, while yellow and orange butterflies can survive due to less visibility to predators. Punctuated balance suggests that once a species seems in the fossil record, the population will become steady and indicate little evolutionary modification, such as a species of birds live in stasis for numerous years. Suddenly bacteria affect their prime tree of shielding to die. The birds must adopt the changes. Some birds survive, and the remaining birds die. Until the others die out, more birds are born. Then the species again returns to a stasis state. The Gradualism model shows evolution as a slow, steady process in which organisms develop and change slowly over time, while punctuated balance models show evolution as a long period of evolutionary change. Due to the mechanisms of evolution in a time frame, both models describe successive evolutionary alterations.
Is this correct I NEED A SOLID ANSWER CORRECTLY (FOR BRAINLIEST)
Answer:
Yes it is right.
Explanation:
The reason why is because you did rise over run correctly, absoultey correct. You followed his instructions, went to the coordidinate 0,-4, then used rise over run and moved up three and over one and got to your awsner.
Hope this helps!
Pls mark brainlest
anyone know the answer???
Answer:
The first one
Explanation:
Quantitative data is data in the form of numbers
Answer: The first option
Explanation: Quantitative data means data that is able to be measured or counted. The first option has 740, which can be counted. The second option is wrong because saying a lake is large is an opinion, meaning it isn't measured. The third option is also an opinion. The last option is also wrong since characteristics such as features or the appearance of something is not quantitative, instead they are qualitative features.
Quantitative data requires something to be measure or counted
Qualitative data requires observations, such as color or appearance
I NEED TO KNOW IF THIS IS RIGHT (ILL GIVE BRAINLY THING FOR EXPLANATION)
Identify the labeled structures.
A
B
В:
D
C:
D
E.
A
Science
Answer:
A- golgi body
B- vacuole
C- mitochondria
D- nucleus
E- cell membarane
Answer:
A- Golgi body
B- Vacuole
C- Mitochondria
D- Nucleus
E- Cell membrane
Explanation:
theory that states all living things are made of cells, that they are the basic unit of structure and
function, and new cells are produced from exisiting cells
Answer:
unified cell theory
Explanation:
The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells. Rudolf Virchow later made important contributions to this theory.
What is an example of "maintaining structure"?
Question 8 options:
a cell dividing
eating an apple
catching a fish
healing a broken arm
a cell dividing
----------------
Answer:
It is heeling a broken arm.
Explanation:
Describe the process and purpose of cell fractionation.
Plz
Please Help ASAP
Which TWO factors most likely increase and decrease along with human population growth?
O A. education
O B. resource consumption
C. recycling of materials
O D. technological advancements
E. converting land for agricultural use
B. Resource consumption and E. converting land for agricultural use are likely to increase along with human population growth, as more people require more resources and food, which often leads to the conversion of more land for agricultural purposes.
What is population growth?Human population growth refers to the increase in the number of individuals in a population over time. As the population grows, there is an increased demand for resources and food, which often leads to the conversion of more land for agricultural purposes and an increase in resource consumption.
Technological advancements may help to increase resource efficiency and reduce environmental impact, but the overall effect on resource consumption is uncertain. Education can play a role in managing population growth and its impact on the environment by promoting sustainable practices and family planning.
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What is the purpose of a cell?
they provided structure for the body taking nutrients from food convert those nutrients into energy and Carry Out specialized functions.
What two parts of a nucleotide do not ?change throughout the structure of DNA a. Five-Carbon Sugar and Phosphate Group b. Five-Carbon Sugar and Nitrogen Base c. All components remain the same ?throughout the DNA structure d. Phosphate Group and Nitrogen Base
Answer:
a. Five-Carbon Sugar and Phosphate
Explanation:
A nucleotide can be defined as an organic molecule which forms the building block of nucleic acid such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Basically, nucleotide comprises of the following parts;
1. Nitrogenous base: this includes adenine (A), thymine (T), guanine (G), and cytosine (C) which are mainly found in the DNA while adenine (A), guanine (G), uracil (U) and cytosine (C) are found in the RNA.
2. A phosphate group.
3. A penrose sugar: it is either deoxyribose in DNA or ribose in RNA.
The two parts or chemical components of a nucleotide which do not change throughout the structure of DNA are;
I. Five-Carbon Sugar also known as deoxyribose and it has hydrogen on its second carbon.
II. Phosphate: this is the structural backbone that provides support to DNA.
function of ectoplasm
Answer:
it helps to form pseudopods. it helps in food ingestion.Identify the three main environmental problems.
Answer:
3 main enviornmental problems are pollution, climate change, and deforestation
Explanation:
Answer:
pollution and global warming and climate change
Explanation:
because it's bad for the animals if they eat the trash they will die. human activities have made global warming and climate change a global threat. the rising level of 02 and other greenhouse gases have caused an increases in average global temperatures , extreme weather events and rising sea levels and other negative changes
According to the host, which of these is true of the reaction between ammonia and hydrochloric acid?
A.
It is considered an acid-base reaction because there is proton donation and acceptance.
B.
It is not considered an acid-base reaction because there is no hydroxide present in the base.
C.
It is not considered an acid-base reaction even though there is proton donation and acceptance.
Answer:
A.
Explanation:
In water, the reaction between ammonia (NH3) and Hydrochloric Acid (HCl) is an example of acid-base chemistry. By its chemical nature, the nitrogen in ammonia prefers to be attached to four hydrogens rather than the three it has, so it receives them from the hydrogen from HCl
What simple machines have been used on pyramid? What advantages do they give?
Answer:
inclined plane and lever. advantages they got allowed them to move rocks higher as they built up and to lift heavier objects.
In which element does an aquatic plant grow in?
Answer:
IRON (FE) As well as enough CO2, aquatic plants need iron and trace elements to survive. Vigorously growing aquatic plants are constantly consuming iron and other trace elements.
Explanation:
The stage which serves as a connecting link between meiosis 1 and meiosis 2 is
Answer:
between meiosis 1 and meiosis 2 is Anaphase 1.
Explanation:
Answer:
anaphase 1
Explanation:
please help
is it currently possible to take a core sample?
Answer is YES your welcome
Explanation:
Core samples are most often taken with their long axis oriented roughly parallel to the axis of a borehole, or parallel to the gravity field for the gravity-driven tools. However it is also possible to take core samples from the wall of an existing borehole.
Which is the best
explanation for why a person who is allergic to dogs is NOT allergic to
peanuts?
1. The antigens on dog fur are the same as the antigens on peanuts
2.Peanut plants do not have antigens on their cells, but dog fur has antigens that always cause a reaction.
3. The antibodies in the allergic response to dog fur also attack the antigens on a peanut
4.The antibodies in the allergic response to dog fur do not fit on the antigens present on a peanut
Answer:
The antibodies in the allergic response to dog fur do not fit on the antigens present on a peanut
A fish in a pond has longer protective spines than any other fish of its species. The spines keep the fish safe from predators. The fish has many offspring, which also have long spines. Which statement BEST describes what happened? A A mutation caused a beneficial change in the fish. B A mutation caused a harmful change in the fish. C Shorter spines caused a genetic change in the fish. D Longer spines caused a genetic change in the fish.
Answer:
D
Explanation:
It is the longer spines that will help to protect the fish from predators. Longer spines caused a genetic change in the fish. The correct answer is option D.
What is the beneficial mutation in the mechanism ?It is the formation of the spines in the mechanism that is favorable as it is protecting the fish from prey so that they don't get attacked.
The many stickleback's populations went into the disparate with the parallel evolutionary's changes and among them the partial or can be complete loss of the pelvic spines. These spines do thought for protection of the fish from devouring by predators.
Initially, the stickleback's population in lake consisted mainly of fish with the pelvic spines but with over 15,000 years population changed to the fish without the pelvic spines. Studies having the living stickleback populations shows that the pelvic spines are an impressive defense against the larger predatory fish such as trout.
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what is today im du/mb so i dont know what today it is
Answer:Today is Friday,Jan 22, 2020
Explanation:
Answer:
today is March 3rd, on a wednesday, 2021
A scan of Sam's genome for the 100 most common mutations known to cause RP didn't find anything. How can you explain this result?
Answer:
He is either not carrying the gene for RP or the RP gene has mutated.
Explanation:
RP or Retina Pigmentosa is an eye defect inherited by a person from a parent. The disease is degenerative as the individual gradually loses his sight. It normally starts off as night-blindness and could go as bad as a total loss of sight.
The mutation of both the RPGR and RP2 genes which are responsible for the function and structure of light-reception in the eye accounts for most cases of Retina Pigmentosa disease.
Why do cells divide? :
The _________ the cell is, the __________the surface area to volume ratio…… there is more outside and less inside.
If a cell is too ________, it takes too __________to get stuff from the outside to the inside.
Types of Cell Division
_______________________ - not sexual reproduction- when cells produce copies of themselves as an organism grows.
_______________________ - when organisms pass on half of their DNA that combines with another set of DNA to make a new organism.
The Cell Cycle
Cells go through a series of steps in a specific order, beginning after a cell has divided
Interphase
G1(gap 1)- ______________________________________________
S (Synthesis)-____________________________________________
G2(gap 2)- ______________________________________________
_________- the division of the nucleus of a cell.
___________- the division of the rest of the cell (the cytoplasm)
_______- cells usually exit the cell cycle after dividing
Bacteria(prokaryotes) are much simpler, doing a process called _________________.
Mitosis
Mitosis is the division of the nucleus , made up of _______ phases:
____________- the nuclear envelope dissolves, DNA condenses.
____________- chromosomes line up along the center of the cell, pulled into place by centrosomes.
____________- chromatids are pulled apart towards centrosomes.
____________- nuclear envelope forms, DNA becomes chromatin.
____________- NOT part of Mitosis, division of the rest of the cell that takes place immediately after telophase.
Cancer
Cells normally only divide to produce _______ or _____, to _______, or to ________.
Cancerous cells continue in the cell cycle when they shouldn't due to damage to ______.
Meiosis
Meiosis is the process by which __________ (sex cells - sperm or egg) are produced.
Meiosis contains the same steps as mitosis, but they occur twice and have important differences.
Since division happens twice, you end up with ______ the DNA at the end.
Miosis vs Meiosis
Mitosis
Meiosis
Starts and ends with a________ (paired) number of chromosomes (humans have 23 pairs of chromosomes, 46 total)
Occurs in____________ for repair or growth.
___________ form of reproduction, producing identical cells.
Starts with a _______ number of chromosomes and ends with a _______ (half, one of each pair) number of chromosomes. Each half from a parent combines to the total.
Occurs in ________________________.
_________ reproduction, creating unique offspring.
Answer:
cells divide for many reasons. For example, when you skin your knee, cells divide to replace old, dead, or damaged cells. Cells also divide so living things can grow. Organisms grow because cells are dividing to produce more and more cells
Explanation:
that's all I can answer but hope this helps a little have a good night :)
