Answer:
a fossil that is useful for dating and correlating the strata in which it is found.
Explanation:
Maybe D I hope it helps you
How does a cell know which genes to express.
Ciliated ependymal cells: A) help form the blood-brain barrier. B) circulate cerebrospinal fluid. C) form myelin in the brain and spinal cord. D) serve as wandering phagocytes during brain injury.
Ciliated ependymal cells: circulate cerebrospinal fluid.
Ependymal cells are a type of epithelial cell that is associated with the cavities of the body through which the cerebrospinal fluid circulates.
They are part of glial cells, which share space with neurons in the nervous system.They create the membranes that keep cerebrospinal fluid circulating through the ependymal canal of the spinal cord and the cerebral ventricles.For this, the ciliated structure that these cells present is essential for a correct movement of the cerebrospinal fluid, preventing it from spilling through other tissues and passing to areas of the body where it should not be.The cilia move rhythmically creating tiny currents for fluid to flow through the central nervous system.A small fraction of highly specialized and modified ependymal cells, called choroidal cells, are responsible for generating this essential fluid.Therefore, we can conclude that ciliated ependymal cells circulate cerebrospinal fluid.
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Mendel knew that the variations in the offspring generations resulted from his experiments because he
Mendel was able to attribute the variation observed in the offspring of his experiment to the controlled fertilization process.
Mendel was able to control pollination and, thus, the fertilization process in the pea plants used for his experiment.
Mendel was able to effectively predict the outcome with self-pollination or cross-pollination with different results coming from each. Thus, he logically concluded that the variation observed in the offspring of his crosses is due to the fact that he controlled the fertilization process.
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Nitrites are added to foods to: a. prevent formation of carcinogens. b. change their color. c. improve their nutritive value. d. inhibit rancidity. e. improve their texture.
Nitrites are added to foods to inhibit rancidity. These compounds are used in the food, chemical and pharmaceutical industries.
Nitrites are conservant that prevent the growth of Clostridium botulinum and Listeria bacteria.
These bacteria (Clostridium botulinum and Listeria) are harmful to human health, thereby nitrites must be added to foods.
In meats, nitrites also exhibit some other beneficial properties which include the pink color, antioxidant properties, and savory flavor.
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white blood cells that engulf and destroy pathogens
There are 2 of them :-
1) Phagocytes
2) Macrophages.
These WBCs attach themselves to disease causing pathogens & then engulf them resulting in the destruction of the pathogens.
_________
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Steve is running at an average of 3mph. He was out for a run for 3 hours how many miles did he travel? 1a. What formula did you use to solve #
How can offspring be created that have a specific phenotype and genotype?
Explanation:
The two things a Punnett square can tell you are the genotypes and phenotypes of the offspring. A genotype is the genetic makeup of the organism. This is shown by the three genetic conditions described earlier (BB, Bb, bb). The phenotype is the trait those genes express. But when it comes to apperences, a phenotype is an individual's observable traits, such as height, eye color, and blood type. The genetic contribution to the phenotype is called the genotype. Some traits are largely determined by the genotype, while other traits are largely determined by environmental factors.
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What are biological associations
Answer:
In ecology, a biological interaction is the effect that a pair of organisms living together in a community have on each other. They can be either of the same species (intraspecific interactions), or of different species (interspecific interactions).
Explanation:
pa brainliest
why not test for pathogens like salmonella directly rather than use an indicator organism such as a coliform?
Indicator organisms are organisms that are utilized to detect the presence of another organisms that cannot be easily identified.
We do not test for pathogens like salmonella directly but use an indicator organism like coliform because these pathogens are not easily isolated and they are much harder to identify.
Pathogens like salmonella are not tested for directly because they are much lower in numbers when found in wastes or waterbodies and to identify them directly is expensive.
Also testing directly for these micro-organisms is very expensive and non-viable. So it is better to use indicator organisms to detect their presence.
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an adaptation of the epithelial cells of the proximal convoluted tubule for reabsorption is
The cells that have the general role of interacting with target cells and then inducing changes in them are ______.
The cells that have the general role of interacting with target cells and then inducing changes in them are called T-cells.
What do you mean by Target cells?Target cells may be defined as a cell that is acted on selectively by a specific agent.
T-cells involve helper T cells (TH cells) and cytotoxic T cells (TC cells) which are represented by a cluster of differentiation CD4+ and CD8+ respectively.
Therefore, the cells that have the general role of interacting with target cells and then inducing changes in them are called T-cells.
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Can an objects mechanical energy be equal to its gravitational potential energy?
Answer:
Yes
Explanation:
Because if an object falls, it gives up its gravitational potential energy. The gravitational force does work on it, and speeds it up.
Answer:
yes
Explanation:
if an object does not have kinetic energy, meaning, it is not moving, its mechanical energy would be equal to its gravitational energy.
Pesticides may enter a forest ecosystem in a number of different ways. Sometimes,
humans intentionally introduce a chemical pesticide to a forest to control the spread of an
invasive species. Although a pesticide may be designed to destroy this species and benefit
the ecosystem, using it can sometimes have unintended consequences.
Which sentences describe possible negative, unintended consequences of this practice?
Select all the correct answers.
The pesticide may be absorbed by other plants and harm them.
Animals that consume plants may ingest the pesticide and be harmed by it.
The pesticide may rid the ecosystem of the species it is designed to destroy.
The pesticide may enter the soil and be washed to other locations by moving water.
Answer:
The pesticide may be absorbed by other plants and harm them;Animals that consume plants may ingest the pesticide and be harmed by it.;The pesticide may rid the ecosystem of the species it is designed to destroy.
Explanation:
I feel these are the most negative consequences they could have
BRAINLIEST?
Organic phosphate is taken up by producers during photosynthesis and released by cellular respiration.
True or false ?
Answer:
true
Explanation:
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Do carbon dioxide molecules enter light dependent or light independent reactions from the atmosphere?
pls help im stuck on this question
Answer:
A- cellular respiration : carbon dioxide
Explanation:
This question is looking for byproducts ie Photosynthesis produces Oxygen. Cellular respiration produces Carbon Dioxide. Hopefully I was able to help you!
Hydrogen and oxygen are examples of which of these?
elements
compounds
molecules
none of the above
Please, someone, help me with this asap!
Observe the cut ends of the flatworms using the hand lens or the dissection microscope immediately after cutting.
What do you see?
Are there distinct differences between the two ends?
Observe the cut ends of the flatworms over a period of several days. Do the flatworm halves continue to exhibit the same degree of difference that was seen right after they were cut in two?
What kinds of changes occur in the flatworms as they recover from having been cut in two?
The above question requires a personal answer about your experience with cutting flatworms. I can't tell you what you saw in this cut, but I'll show you what happens when it occurs.
First of all, you must understand that flatworms are worms with a great capacity for cell regeneration even if several pieces have been cut.
In this case, when a flatworm is cut in half, we can see the following events happen:
At the moment of cutting, the two ends of the flatworm body are equally shaped and are straight ends, without deformations.The ends will not be different if the cut is done accurately, but it may differ slightly.After several days, the ends will present some deformations and will lose the straight shape caused by the blade.Deformations are extremely similar and change similarly.When recovering from the cuts, each side of the flatworm body formed a new flatworm and they are no different, they are the same and they are completely recovered.This is because the cellular regeneration of flatworms is very fast and allows any part of the flatworm's body to create exactly the same beings, as they have the same genetic makeup.
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Someone plz help me :(
Mutations cause changes in _____.
Answer:
mutation cause changes in genetic material
1. Science has limits and cannot answer all questions. Define science, and then give an e question that science is able to answer.
Answer:
science is the study of the structure and behavior of our world and universe.
Things science cannot explain
Why ice is slippery
How many species of animals and living things there are
Explanation:
Chemical to thermal to electrical current?Energy conversion of corn
Answer:
A battery is a device that converts chemical energy contained within its active materials directly into electric energy by means of an electrochemical oxidation-reduction (redox) reaction. This type of reaction involves the transfer of electrons from one material to another via an electric circuit.
the mycelium is a mesh of filaments, each of which is called
19. Dax just completed a report on car transportation. He concluded that gasoline
prices will likely rise significantly in the years to come and recommends lower-
cost car transportation for the future. Dax's younger sister, Ava, just completed a
report on air pollution. Ava concluded that gasoline-powered cars cause too
much pollution and recommends that they should not be used in the future.
Which of the following is a solution for the future that would follow both Dax's
and Ava's recommendations?
A solution for the future that would follow both Dax's and Ava's
recommendations will be to develop cars that run on fuels that pollute less
and cost less than gasoline.
The use of other fuels such as electricity is cheaper than gasoline and will
help tackle the problem of the rising cost of gasoline.
The use of alternative sources doesn't involve the release of gases such as
carbon monoxide etc which pollutes the environment as carbon isn't burned
when electricity is used.
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Answer:
development of cars that run on fuels that pollute less and cost less than gasoline
Explanation:
. Insulin controls the insulin level in ____________
Answer:
I dont really understand the question but if anything its the pancreas
Explanation: The pancreas produces insulin
which division of the nervous system controls the radial muscles of the eye?
Answer:
sympathetic.
Explanation:
is a wrong?..........
Answer:
no it is correct I think hops it helps a lot;))))
which parts of the monomers involved in the dimer formation
Answer:
A dimer (/ˈdaɪmər/) (di-, "two" + -mer, "parts") is an oligomer consisting of two monomers joined by bonds that can be either strong or weak, covalent or intermolecular. The term homodimer is used when the two molecules are identical (e.g. A–A) and heterodimer when they are not (e.g. A–B).
Explanation:
There are two types of reproduction, sexual and asexual Sexual reproduction involves two parents, while asexual reproduction only involves one,
Sort the reproductive processes below according to whether they are asexual or sexual.
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Creation of an egg
Creation of fruit
Mushrooms producing spores
Production of seeds
Stem cuttings of plants
Sexual
Asexual
Budding in yeast
drag and drop answer here
drag and drop answer here
Creation of an egg- sexual
Creation of a fruit - sexual
Mushrooms producing spores - Sexual
Production of seeds - Sexual
Budding in yeast - Asexual
Stem cuttings of plants - Asexual
what needs to occur for a fluorescent mineral to give off light?
Fluorescent minerals contain particles in their structure known as activators, which respond to ultraviolet light by giving off a visible glow. Ultraviolet light is a form of electromagnetic radiation invisible to the human eye. There are two classified ultraviolet wavelengths: longwave and shortwave.