The brain and central nervous system shrink as we age.
What happens to the brain when we age?The brain is one of the most important organs in our body because all the nerve signals are produced there for our body to function.
In the brain we find nerve connections through neurons. A particular aspect of them is that during childhood and adolescence they multiply as we learn new things.
However, once we reach the stage of old age, these nerve connections deteriorate and are reduced, therefore, the size of the brain and the central nervous system decreases.
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what is the likelihood of a cell firing determined by ?
The likelihood of a cell firing is typically determined by adding both the excitatory and inhibitory synaptic input.
What is a cell?A cell can be defined as the fundamental functional, structural and smallest unit of life, which is found within the body of an organism.
Generally, the likelihood of a cell firing is typically determined by adding both the excitatory and inhibitory synaptic input. Thus, the net sum of the excitatory and inhibitory synaptic input would determine whether or not a cell fires.
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Rachel Carson warned of the danger of increased use of pesticides.
true false
Answer:
True
Explanation:
Carson's 1962 bestseller first warned the public about the devastating effects of chemical pesticides—and started a revolution. Carson's 1962 bestseller first warned the public about the devastating effects of chemical pesticides—and started a revolution.
Answer: true
Explanation:
How did different skin colors evolve in humans?
Skin colors evolve in humans as an adaptive feature to the amount of solar radiation in a given latitude.
What is adaptation?Adaptation is a given phenotypic feature that confers an advantage to the individual in particular environmental conditions.
Apadtations are selected by natural selection, which means that they exhibit differential survival and/or reproduction rates.
In conclusion, skin colors evolve in humans as an adaptive feature to the amount of solar radiation in a given latitude.
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10 The table shows the scientific names and the common names of four plants.
scientific name
Althea officinalis
Hottonea palustris
Viola palustris
Viola tricolor
common name
marshmallow
water violet
marsh violet
wild pansy
Which word in their names shows that two of the plants share the greatest number of features?
A marsh
B palustris
C Viola
D violet
Answer:
A marsh the answer is A
Explanation:
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The word in their names shows that two of the plants share the greatest number of features is marsh. Therefore, option A is correct.
What is marsh ?A marsh is a type of wetland where herbaceous plant species, not woody ones, predominate. The transition between the aquatic and terrestrial ecosystems is commonly formed by marshes, which are frequently found along the borders of lakes and streams. Grass, rush, or reeds frequently rule over them.
Cattails, sedges, papyrus, and sawgrass are typical examples. Most aquatic creatures, including fish and salamanders, can survive in water with little oxygen.
In a marsh, herbaceous plants make up more than half of the vegetation, and the pH of the soil is neutral. There are fewer than 30% woody plants in the area. Throughout the growth season, a marsh has standing water for extended periods of time.
Thus, option A is correct.
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EASYYYYYYYY
a. Worldwide, what percentage of human water usage does industry account for?
b. What percentage in the US of human water usage does industry account for?
The percentage of human water usage that the industry account for is 19% while the percentage does industry account for in the US for human water usage is = 5%
What is human water usage?Human water usage is the water used by individuals for direct purposes such as bathing, drinking, and cooking.
The percentage of human water usage that the industry account for is 19% while the percentage does industry account for in the US for human water usage is = 5%
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Mitochondria and chloroplasts
have their own DNA but no
organelles.
Mitochondria and chloroplasts are MOST SIMILAR to which type of cell?
A. root cells
b amoeboid cells
C. prokaryotic cells
Answer:
C. prokaryotic cells
Definitions
The Mitochondrion is an organelle in the cytoplasm of cells that functions in energy production.
Chloroplast is usually defined as a plastic containing chlorophyll.
Chlorophyll is the green coloring matter of leaves and plants, essential to the production in a bluish-black form, C55H72MgN405 (chlorophyll a), and a dark-green form, C55H70MgN4O6 (chlorophyll b).
A root cell is one of the maestro cells in the human organic structure that has possible ability of turning into any of the more than the organic structure's 200 cell types.
Prokaryotes is any cellular organism that has no nuclear membrane, no organelles in the cytoplasm except ribosomes, and has its genetic material in the form of single continuous strands forming coils or loops, characteristic of all organisms in the kingdom Monera, as the bacteria and blue-green algae.
What are the similarities and differences between prokaryotes, mitochondria, and chloroplasts?Both mitochondria and heterotrophic prokaryotes, as well as chloroplasts and autotrophic prokaryotes, have a genetic structure (DNA with a circular double helix shape and the genes themselves), as well as comparable ribosome types. In reality, the endosymbiotic idea is based on these parallels.
how does global warming impact animals?
please answer asap
Answer:
It can Change their Lifespan if it's an insect
Explanation:
If the haploid number of a mammalian cell is 32, there will be _______ sister chromatids during metaphase of mitosis.
Answer:128
Explanation:
What are the oval shaped structures that can be found all over the slide.
The oval-shaped structures that can be found all over the slide are Nucleus.
What are a nucleus and its function?
The nucleus controls and holds the activities of the cell (e.g., growth and metabolism) and has the genes, and structures that include the hereditary data.
Nucleoli are miniature bodies often seen within the nucleus. The gel-like matrix in which the nuclear features are poised is the nucleoplasm.
Thus, oval-shaped structures that can be found all over the slide are Nucleus.
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which of the following is true regarding speciation and mechanisms of evolution?
Speciation is one of the driving processes of evolution and results in the formation of new species.
What is evolution?Evolution is the process by which new organisms are formed from existing organisms due to changes that result in increasing complexity of the organisms.
Speciation is the process by which new species are formed from existing species.
Therefore, it can be concluded that speciation is one of the driving processes of evolution.
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true or false? the leukocytes of the innate immune system are b cells, macrophages, and neutrophils.
The statement that leukocytes of the innate immune system are b cells, macrophages, and neutrophils is TRUE
What are the leukocytes of the innate immune system?The leukocytes of the innate immune system are mainly phagocytes, or phagocytic cells meaning “eating cell”, which describes what role phagocytes play in the immune response.
These phagocytes circulate the body, sort for potential threats such as bacteria and viruses, to engulf and destroy them.
Phagocytic cells of the innate immune system include the mast cells, B- cells, neutrophils and macrophages.
Therefore, the leukocytes of the innate immune system are b cells, macrophages, and neutrophils is TRUE
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Which of these
describes
humoral immunity?
A. the binding of antigen and antibody triggering a
response of plasma and memory b-cells to attack
B. t-cells and macrophages fighting infected cells that
are non-self or cancerous
C. our body remembering pathogens it has fought off or
learning from vaccines
D. obtaining immunity from an outside source, like
mother to baby
FutureForw
Answer:
D
Explanation:
obtaining immunity from an outside fluid
Consider the following prediction. Prediction: If tomato plants are harmed by NoGro herbicide, then an increase in the concentration of NoGro herbicide in the supplied water will result in a decrease in the average height of the tomato plants over a one-year period. Which of the following best describes this prediction?
OA. The prediction is not useful because it has not yet been peer- reviewed by other scientists.
OB. The prediction is useful because it summarizes what is already known about a particular research question.
OC. The prediction is not useful because it fails to mention the name of the scientist doing the experiment.
OD. The prediction is useful because it explains what observations will be made if a hypothesis is true
The statement that describes this prediction is as follows:
The prediction is useful because it explains what observations will be made if a hypothesis is true.Thus, the correct option is D.
What is Herbicide?Herbicide may be defined as a chemical agent that is responsible for destroying or inhibiting the growth of a particular plant as compared to the normal one.
The projection is necessary because it supports the product after a one-year duration. So for example, if after one year there is undoubtedly a reduction in the intermediate height of the tomato plants, then we can absolutely say that it is because of the existence of NoGro herbicide which is supplied in water.
Therefore, it is well described above.
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A forest fire destroys an area. A small population of trees and a large population of birds are both affected. Which
type of limiting factor causes this?
density dependent
density independent
population dependent
population independent
Answer:
Density Independent
Explanation:
Density independent is the factor that will affect a population no matter its size. Temperature, natural disasters, and oxygen levels all influence this.
The correct term to describe the type of limiting factor that causes the destruction of both the small population of trees and the large population of birds in this scenario is "density-independent." Density-independent factors are environmental factors or events that affect populations regardless of their size or density.
What is density-independent?Density-independent factors are environmental factors or events that affect populations regardless of their size or density. These factors exert their influence on population dynamics independently of population density. Density-independent factors include natural disasters like earthquakes, floods, hurricanes, and forest fires, as well as extreme weather events, habitat destruction, pollution, and certain diseases.
In this case, the forest fire is an example of a density-independent factor because it can impact both the tree population and bird population regardless of their respective sizes or densities.
Therefore, the correct answer is "density-independent."
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Alpa wants to change 0.54 kilometers into a smaller metric unit. She will have to
The correct answer is that she has to multiple
Multiple
Explanation:
Hope its help
Hope its help
If a gene has 9 codons, how many amino acids long would it be?
In order to determine the shape of human muscle cells, a scientist should:
A. observe a sample of the cells with an electron microscope
B. prepare a medium for making a culture of the cells
C. observe a sample of the cells with a light microscope
D. prepare a model of that type cell
observe a sample of the cells with a light microscope
Explanation:
.
PLESE HELP ILL GIVE BRAINLIEST!!!!! A student has an unique genetic disorder where they cannot create enough energy to move around. It turns out she is most likely born without enough of which organelle?
2. Explain why low carbohydrate diets cause a los of fat. You must describe how aerobic cellular
respiration works in your body when you answer this question.
Low carbohydrate diets cause a loss of fat because it leads to the process called ketosis associated with burning stored fats for energy.
What is cellular respiration?Cellular respiration is the main process by which cells obtain energy by synthesizing ATP, which is mainly achieved by burning glucose (carbohydrate) molecules.
Low carbohydrate diets lead the body to a process known as ketosis where fats are converted into ketones that act as good respiratory fuels.
In conclusion, low carbohydrate diets cause a loss of fat because it leads to the process called ketosis associated with burning stored fats for energy.
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ASAP Look at the position of Location 1, Location 2, and Location 3 on a mountain.
Simple diagram of a mountain represented by a triangle. There are three labels in the diagram: Location 1 is at the middle of the left section, Location 2 is at the very top of the mountain, and Location 3 is at the middle of the right section.
Which of these statements is most likely correct about the climate of the three locations? (3 points)
A.Location 1 is cooler than Location 3 and Location 2.
B.Location 1 and Location 3 are warmer than Location 2.
C.Location 3 is cooler than Location 2 and Location 1.
D.Location 1, Location 2, and Location 3 are equally cool.
The statement which is most likely correct about the climate of the three locations is Location 1 and Location 3 are warmer than Location 2. Thus, the correct option is B.
What is Climate?Climate may be defined as the weather situations persisting in an area widespread or over a long period of time.
Climate is highly influenced by elements such as latitude and altitude. In this case, the altitude of location 2 is found to be high as compared to location 1 and location 3, and hence, the climate of location 2 is found to be cooler than location 1 and location 3.
Therefore, it is well described above.
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Anatomy is the study of atom in space.
True
False
Answer:
false anatomy is the study or review of an object more popular is the human anatomy
Answer: false
Explanation: Each element has a specific number of protons in the nucleus.
Which of the following is not a type of variable in a scientific experiment?
Observation is the only option that is not a variable in scientific experiment.
What are variables in scientific experiment?
Variables are factors, or condition that can exist in differing amounts during a scientific experiment.
Types of variables in scientific experimentScientific experiment usually has three kinds of variables:
independent, dependent, and controlled.Thus, Observation is the only option that is not a variable in scientific experiment.
The complete question is below:
Which of the following is not a type of variable in a scientific experiment? A. Independent B. Control C. Dependent D. Observation
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How does the nebular hypothesis account for the formation of planets?
Answer:Our solar system formed at the same time as our Sun as described in the nebular hypothesis. The nebular hypothesis is the idea that a spinning cloud of dust made of mostly light elements, called a nebula, flattened into a protoplanetary disk, and became a solar system consisting of a star with orbiting planets
Explanation:
Even when asymptomatic, _______ can still be actively multiplying and killing cells in the immune system that help fight pathogens.
Even when asymptomatic, the virus can still be actively multiplying and killing cells in the immune system that help fight pathogens. This is further explained below.
What is a virus?Generally, the virus is simply defined as a virus consisting of a core of genetic information, either DNA or RNA, wrapped by a capsid, which is a protective covering formed of protein.
In conclusion, It is possible for the virus to be actively reproducing and destroying immune cells even in the absence of any outward symptoms.
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Question 3 of 10
What was the purpose of treating the radish seeds for the lab "Radical
Radishes" with radioactive cobalt-60?
A. To cause mutations in the radish embryos
B. To hybridize normal radish DNA with a radioactive DNA probe
C. To kill all the living microorganisms on the seeds
D. To produce labeled probes with radish DNA
SUBMI
The purpose of treating the radish seeds with radioactive cobalt-60 is to cause mutations in the radish embryos (Option A).
What is chemical mutagenesis?Chemical mutagenesis is a technique used in molecular biology laboratories by inducing mutations in germinal cells.
Chemical mutagenesis is very useful to link an anormal phenotype to a mutated gene, an approach known as reverse genetics.
In conclusion, the purpose of treating the radish seeds with radioactive cobalt-60 is to cause mutations in the radish embryos (Option A).
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The function of y is to transport ___ produced by plants during __ to other parts of plants.
Answer:
dissolved food substances,photosynthesis
Explanation:
Y is the phloem
Transportation occurs from the leaves to other parts of the plant
Internal membrane-bound compartments located in the cytoplasm of eukaryotic cells are called.
Internal membrane-bound compartments located in the cytoplasm of eukaryotic cells are called organelles.
What is a membrane-bound compartment within the cell?An organelle is a membrane-bound compartment or structure in a cell that serves a particular function.
In the less-stricter definition, an organelle directs to any cellular structure, whether it is membrane-bound or not, that has a special function.
Thus organelles are the answer.
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Complete the concept map to identify the facial and cranial bones and their relationships to the cavities and sinuses of the skull.
According to the research, the skull is a set of eight cranial bones welded and joined together and fourteen the facial bones.
What are the skull bones?In the skull there are various bones that articulate with each other to result in the structure known as the skull and the bone mass.The facial bones located in the lower and anterior part of the head, with a total of fourteen bone structures that can be found in it.The cranial bones are made up of two parietal bones, two temporal bones, a frontal bone, an occipital bone, a sphenoid bone and an ethmoid bone which, when articulated together, form a narrower anterior pole and a posterior pole.Four main structures arise from the union of the facial bones: the eye socket, the nostrils, the pterygomaxillary fossa and the palatine vault.
Therefore, we can conclude that according to the research, the skull is a set of eight cranial bones welded and joined together and fourteen the facial bones.
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With ideal environmental factors, the reproduction rate of bacteria is...
With ideal environmental factors, bacteria are able to reproduce at a very rapid pace.
Bacterial reproductionBacteria reproduce mainly by a single cell dividing into two, given the right condition. In order words, they reproduce by binary fission.
When environmental conditions are optimum, a typical bacterial cell can divide every 4 to 20 minutes depending on the species.
The time can become longer with sub-optimal environmental conditions.
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Which of the following are complementary pairs in DNA:
True
False
Answer:
B) C - G
Explanation:
There are only 2 complementary bases in DNA which are:
A - TC - G