I need help with this practice problem I answered it, however, I’m struggling with if I am right…

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

Answer: C

Explanation:

Answer: The answer is A

Explanation:

According to the given statement  The average atomic mass of rubidium is 85.468 .

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.

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.

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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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.

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.

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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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.

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?

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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.

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

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.

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?

The DNA is constructed from sugars, phosphates and bases as follows:

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.

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:

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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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 .

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.

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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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.

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.

Answer:

A. A scientist must research to understand the topic before being able to create a scientific hypothesis.

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.

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.

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.

Answer:

the study of nutrients in food, how the body uses them, and the relationship between diet, health, and disease

Explanation:

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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Answer: a physical phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects.

Explanation: