It is true that, Despite the fact that the complexity of animal nervous systems varies, their nerve cells are still remarkably similar.
Nearly all multicellular animals have nerve systems, but their complexity varies greatly. Sponge and the tiny blob-like placozoan and mesozoan organisms are the only multicellular animals without a nervous system. A diffuse nerve net makes up the nervous systems of ctenophores (comb jellies) and cnidarians (such as anemones, hydras, corals, and jellyfish). With the exception of echinoderms and a few worm species, all other animals have a nervous system that includes a brain, a central cord (or two parallel cords), and nerves that radiate from the brain and central cord.
The nervous system's most fundamental roles are to direct an organism's movement and to influence its surroundings (such as through pheromones). Signals are sent from one cell to another or from one part of the body to another to accomplish this. Signals that travel to muscle cells trigger the activation of muscles and signals that travel to endocrine cells triggers the release of hormones into the bloodstream or other internal fluids are the sources of the output that the nervous system produces.
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4. A(n) ______________ is an organism that contains a gene from anotherorganism.A. cloned organismB. inbred organismC. transgenic organism
An organism that contains genetic material that has been isolated from another organism and inserted into it by biotechnological tools is known as a transgenic organism, and this is usually done to produce organisms that have a desired genome to, for example, have a resistance to some pathogens that could harm it otherwise, such as plagues, and this is because the inserted DNA produce a genetic output in terms that the organisms can now produce proteins that before it couldn't.
We can see this process currently used in the agricultural industry, where some plants have external genetic material in them, such as tomatoes or apples.
Answer:
Explanation:
C. transgenic organism
Transgenic refers to an organism or cell whose genome has been altered by the introduction of one or more foreign DNA sequences from another species by artificial means. Transgenic organisms are generated in the laboratory for research purposes.
What is the density of a piece of lead that has a mass of 253.1 grams and a volume of 22.4 cm3?
a 3.4 g/cm3
b. 9.5 g/cm3
c. 11.3 g/cm3
d. . 15.8 g/cm3
Answer: The answer is A
Explanation:
What are RNA Primers? And what is their role in DNA replication?
RNA primers are short dna sequences. In DNA replication, primers pair up with sequences on the lagging and leading strand kickstarting the whole process of replication.
What is the purpose of gathering information for your topic?
Group of answer choices
A. A scientist must research to understand the topic before being able to create a scientific hypothesis.
B. It is important to indicate to someone something you have observed in writing.
C. Gathering information would make the results skewed.
D. Creating the graph would help communicate the results efficiently.
Answer:
A. A scientist must research to understand the topic before being able to create a scientific hypothesis.
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1. What is an insulating layer around some axons in the brain and what is it made of?
A.oglioglia; neurons
B.astroglia; Schwann cells
C.myelin; Schwann cells
D.myelin; amino acids
Myelin, which is composed of Schwann cells, is an insulating layer that surrounds portions of the brain's axons. A protective covering known as myelin is produced by Schwann cells in the peripheral nervous system.
What does myelin mean?A protective layer or sheath called myelin develops around nerves, including those in the brain and spinal cord. It is composed of fatty and protein components. Electrical impulses may move swiftly and effectively along nerve cells because to its myelin layer.
Schwann cells make myelin in the peripheral nervous system (PNS: nerves) and oligodendrocytes in the central nervous system (CNS: brain and spinal cord). In the PNS, one Schwann cell forms a single myelin sheath
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1. In animals, fertilization is to zygote as meiosis is to which of the following?
In animals, fertilization is to zygote, as meiosis is to (5) gamete.
Fertilization is the process of fusion of the male and the female gamete in order to form new organism which is diploid in nature. This process occurs only in the sexual mode of reproduction and unlike asexual reproduction, presence of two parents is essential in this.
Gamete is the germ cell that is involved in the process of sexual reproduction, in order to give rise to a new organism. Gamete is haploid in nature because it fuses with another gamete of the opposite sex in order to establish the diploid nature.
The question is incomplete, the complete question is:
In animals, fertilization is to zygote as meiosis is to which of the following?
mitosisdiploidchromosomereplicationgameteTo know more about gamete, here
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Which of these statements is true with regard to this animation?
sodium and potassium ions are transported against their concentration gradients.
the cell is not expending energy.
sodium ions are transported down their concentration gradient.
potassium ions are transported down their concentration gradient. the cell does not expend atp?
Option A. Both sodium and potassium ions are transported against their concentration gradient.
A concentration gradient happens when the attention of particles is better in a single area than in every other. In passive shipping, particles will diffuse down a concentration gradient, from areas of better awareness to areas of decreased concentration, until they are frivolously spaced.
A concentration gradient happens when the concentration of debris is higher in a single vicinity than in some other. In passive transport, debris will diffuse down a concentration gradient, from areas of higher awareness to areas of decreased awareness, till they're frivolously spaced.
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What material is left over in thelarge intestine?A. insoluble fibers, waste, and waterB. the liquefied food full of nutrients to be absorbed into the blood streamC. a ball of food waiting to be broken downD. small pieces of food mixed with enzymes and digestive substances
The goal of the large intestine is to absrob minerals, remaining nutrients, and specially water. So this kind of components must enter the large intestine. Therefore the correct option is A. "Insoluble fibers, waste and water. B./C are not correct, because the food full of nutrientes/ball of food enters the small intestine, before the large one. D. is not correct either, because the food along with enzymes are the products that exit from the stomach.
Describe the structure and the function of the endoplasmic reticulum. include information for the two types of endoplasmic reticulum. Use details to support your answer.
Answer and explanation
Endoplasmic reticulum (ER) is a tubulus membrane that is found in the cytoplasm of the Eukaryote. It's structure consists of the nuclear envelope and the pheripheral endoplasmic reticulum.
Endoplasmic reticulum is divided into 1. smooth ER and 2. rough ER
1. Rough ER - has large numbers of ribosomes attached to the outer surfaces of the lamella membranes, this is the area of ribosomes important for protein production, storage and export. The modified proteins move slowly along the inside of the rough ER until they are packed into small vesicles of the endoplasmic reticulum. After packaging, the proteins are moved by elements of the cytoskeleton either to the Golgi apparatus or to the plasma membrane.
2. Smooth ER - Is involved in the synthesis of steroid. On the surface of smooth ER, there are no ribosomes, therefore it does not participate in the formation of proteins. Its function is to contains many enzymes and other proteins, in liver cells, that have the ability to detoxify a wide range of drugs and poisons.
The gap in the rock record that occurs between folded or uplifted rock layers and a sedimentary rock layer on top of them is called a(n)
Answer: Unconformity
Explanation: The gap in rock records that occurs between folded or uplifted rock layers and a sedimentary rock layer on top of them is called as Unconformity.
number 1 in the diagram above is a representation of a/an
If number 1 is the single strand within the nucleus, it is mARN or messenger ARN. mARN has the genetic information needed to make proteins and carries this information from the DNA nucleus of the cell, to the cytoplasm where proteins are made.
What effects will result in an individual with this karyotype?
Answer: Trisomy 21
Expanation: tTe most common chromosomal anomaly in humans, affecting about 5,000 babies born each year and more than 350,000 people in the United States. Also known as Down syndrome, trisomy 21 is a genetic condition caused by an extra chromosome.
What is the mass of a piece of platinum that has a density of of 21.4 g/cm3 and a volume of 0.4 cm3?
a 8.6 G
b. 21.8 g
c. 53.5 g
d. 115.8 g
Answer: C
Explanation:
What does not occur as a result of loss of biodiversity? A) Increase in pest populations because of loss of predatorsB) increase in the hole in the ozoneC) impaired soil formationD) less efficient water purification
Let's define what biodiversity is:
Biodiversity if the variety of different species within an ecosystem.
Now let's apply this information to answer our question:
We are trying to find which answer choice would not result in a loss of biodiversity, aka which of the answer choices increases the biodiversity.
0. Increase in pest populations because of loss of predators - this answer choice is ,correct,. We are ,increasing, a population in the ecosystem.
,1. Increase in the hole in the ozone - this answer choice is ,incorrect,. An increase in the hole of the ozone is ,dangerous, - it kills off populations of species living within an ecosystem.
,2. Impaired soil formation - this answer choice is ,incorrect,. If soil formation is incorrect, primary producers wouldn't be able to grow, affecting populations by decreasing them within an ecosystem.
,3. Less efficient water purification - this answer choice is ,incorrect,. If there is not enough water present in an ecosystem, it will cause populations to go down, ,decreasing, the biodiversity.
Therefore, our answer choice is A.
what is food nutrition
Answer:
the study of nutrients in food, how the body uses them, and the relationship between diet, health, and disease
Explanation:
What causes body water to increase during pregnancy?
Which of the following biological molecules are composed of the elements C, H, O only
The biological molecule composed of elements C, H, O only is: (2) carbohydrate.
Biological molecules are the organic polymers present inside the body that help in the proper maintenance and functioning of the body. The major biological molecules present inside the body are: carbohydrates, proteins, nucleic acids and lipids.
Carbohydrate is a polyhydroxy ketone or aldehyde. They are of three types: monosaccharides, disaccharides and polysaccharides. Mono saccharides are the basic monomeric unit that form the di- and poly-saccharides. They serve several functions like structural, energy, food, etc. Examples are glucose, starch, glycogen, etc. It is a very essential nutrient in foods.
The question is incomplete, the complete question is:
Which of the following biological molecules are composed of the elements C, H, O only?
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Which of the following is not characteristic of salt marshes and mangrove swamps?Group of answer choicesBoth are threatened by developmentBoth provide habitats for wildlife.Both are found along coastal areasBoth are dominated by marsh grasses
Difference between salt marshes and mangrove swamps
Salt marshes
> found in coastal areas
> more dominant in temperate regions and colder areas
> dominated by marsh grasses
> sensitive to changes in the coastlines
Mangrove swamps
> found in coastal areas
> more dominant in tropical regions and warmer areas
> dominated by mangrove trees
> sensitive to land conversions of the coastline
ANSWER: Both are dominated by marsh grasses
Which type of sedimentary rock is pictured here?
Draw and label a simple diagram to show how DNA is constructed from sugars, phosphates and bases.
The DNA is constructed from sugars, phosphates and bases as follows:
How many chromatids make up each chromosome in G1?
Answer:
2 sister chromatids
Explanation:
Answer:
2 sister chromatids
Explanation:
Each chromosome composed of 2 sister chromatids . The daughter cells now close in to the 3rd and last phase of meiosis : meiosis II .
All animals area. polytrophsb. heterotrophsc. autotrophsd. biotrophs
Animals
All animals are heterotrophs (option B), which means that they cannot produce their own food, and therefore they need to feed on different types of organic matter in order to obtain energy for survival.
Enzymes speed up reactions by lowering the activation energy of a reaction. This is comparable withA.reducing the force a ball needs to start rolling down a hill B.increasing the height an apple will fall from a tree C.causing a snow storm in the middle of summer when temperatures are hot D.blocking a flowing river with a dam to stop the flow E.All answers are correct
The enzymes activity is mensured to indicate the rate of reaction catalysed by that protein, the action of the enzyme is to decrease the time required for a natural reaction to occur, for example the sucrase breaking down the sucrose, or a lactase for lactose. Therefore, the option with a example that is similar to enzymatic activity is A. reducing the force a ball needs to start rolling down a hill (the force for the start of the movement is comparable with the activation energy of a chemical reaction). The other options present situations opposite to what is expected from the action of a catalyst molecule.
What is magnetism ?
.....
Answer: a physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects.
Explanation:
look at the picture
According to the given statement The average atomic mass of rubidium is 85.468 .
What is atomic mass?The average mass of an element's atoms measured in atomic mass units is known as its atomic mass (amu, also known as daltons, D). The mass of each isotope is divided by its abundance to create the atomic mass, which is a weighted average of all the atoms of that material.
Briefing:Given that the abundance of the ⁸⁵Rb isotope is 72.17% and its atomic mass is 84.912amu
We get 84.912 x 0.7217 = 61.281
And the abundance of the isotope ⁸⁷Rb, having an atomic mass of 86.909, is 27.83%.
We get 86.909 x 0.2783 = 24.187
Thus we get 61.281 + 24.187 = 85.468 as the average atomic mass of Rubidium.
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The complete question is -
Calculate the average atomic mass of rubidium. Rubidium has two isotopes, ⁸⁵Rb and ⁸⁷Rb. 85Rb has an atomic mass of 84.912 amu and occurs at an abundance of 72.17%. ⁸⁷Rb has an atomic mass of 86.909 amu and occurs at an abundance of 27.83%. Show your work.
In fish, these turn gills. Evolutionists claim that in mammals these turn into the ears and throats. Evolutionists claim this points to a common ancestor.TailGill slistsEmbryo Yolk sac
Fish's gills and mammal's ears and throats originate from similar structures found in the embryonic stage, which are known as gill slists or pharyngeal slits, and are found in all vertebrates during embryonic development.
This means gill slists is the right answer.
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The complete chart indicating the number of chromosomes after meiosis, in body cells, in gametes and after mitosis are indicated in the given image.
Meiosis is the process of cell division in which the number of chromosomes are reduced to half. This is the reason why it is also called the reductional division. The process occurs in two phases: Meiosis I and Meiosis II. Meiosis I is the phase where actual reduction takes place.
Mitosis is the process of cell division where the daughter cells are identical to the parent cell. Here, the number of chromosomes remain the same and hence is called equational division.
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Which of the following statements about the electron transport chain is true?
Group of answer choices
A) It is driven by ATP hydrolysis.
B) It includes a series of hydrolysis reactions associated with mitochondrial membranes.
C) It consists of a series of redox reactions
D) It occurs in the cytoplasm of both prokaryotic and eukaryotic cells.
Answer: I'm im 99% sure it's C "It consists of a series of redox reactions" if it's right do you mind giving a brainliest?
Are there difference or similarities in the cell division between plant and animal cell?
There are both similarities and differences in the cell division between plants and animals. The process by which an existing cell divides itself into two daughter cells is called mitosis.
Some differences include:
Plants only go through mitosis in their meristematic tissues, but all animal organs go through it, except their reproductive cells.In plants, spindles form without the assistance of centrioles, whereas in animals, centrioles are necessary for the process.In plants, cytokinesis occurs when a cell plate develops inside the parent cell and extends outward until the cell divides. In animals, the cell is split by pinching and cleaving.In plants, the cell plate that expands centrifugally from the inside out is the centre of division. Animals experience centripetal cleavage, which happens from the outside to the inside.Eukaryotic cells, which include both animal and plant cells, share several characteristics. Common organelles including the cell membrane, cell nucleus, mitochondria, endoplasmic reticulum, ribosomes, and Golgi apparatus are among the organelles that share similarities.
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Is the method "Reduce, Reuse, Recycle" useful in getting rid of plastic in our environment?
The method "Reduce, Reuse, Recycle"is really important for managing human impacts in our environment. The less plastic we consume (reducing), the better. As much as we can reuse the plastic, the better also. We wouldn't be creating that many trash and would be reducing pollution. Recycling is always the best way to deal with our trash, so it won't be harmful to the environment. However, to really get rid of plastic in our environment it is important to stop producing plastic as well, not only reducing the consume, reusing the plastic and recycling the trash