Which model best describes how gravity causes star formation?

Answer:

laws are so far permanent and can be amended, other-wise they can't be removed

theories, are different, theories are just theories that are ready to become something like a law, it is still in testing mode, it is like a bill in terms of law and has a possibility to become a passed law, just needs more hypothesis's and conclusions

Explanation:

law = law that is passed

theories = bills in law

Answer:

it is 0.06milimeters or 60 micrometres

Explanation:

a human cheek cell is about 60 micrometres in diameter.if it was 100000 times bigger, it would have

the length of an average classroom (6m).

Answer:

B

Explanation:

Commensalism is a symbiotic relationship in which one species benefits while the other species is not affected.

Answer: B. One organism benefits and the other is not affected

Answer:

The correct answer is: D) a drug that blocks gene expression in circular chromosomes.

Explanation:

Antibiotics are the drugs that are mostly used when it comes to treating bacterial infections because of their effective mechanisms in killing bacteria and/or preventing their spread.

Bacteria have the ability to colonize and infect different organisms by making use of highly diverse mechanisms, some of which involve the use of toxins or the inhibition of the host's immune system.

Bacteria are prokaryotic individuals - instead of having a nucleus containing DNA in multiple chromosomes like eukaryotes have, they have one single circular chromosome that holds all or most of all their genetic information. If we wanted to treat a plant (which is a eukaryotic being) for a bacterial infection, we should aim to block the expression of genes in circular chromosomes, which is a distinct feature in bacteria.

If we were to give the plant a drug that interferes with mitochondria function or destroys the central vacuole, we would only be affecting plant cells and probably killing the plant. A drug that disrupts cell walls would affect the bacteria but would kill the plant as well (both organisms have cell walls). The only viable option out of the mentioned is using a drug that inhibits gene expression in circular chromosomes.

Answer

D. 0.1kcal

hope it helps?

If producers receive 1,000kcal of energy from the sun, the energy received by the tertiary consumers in that energy pyramid is 1kcal. So, the correct option is D.

When many food chains of an ecosystem are interconnected with each other to make a complex web-like structure is known as the Foodweb.

Lindeman gave the 10% law which means at each step of the food chain when food energy is transferred from one trophic level to the next trophic level, only about 10% of energy is passed on to the next trophic level.

Producers (100%) → Primary consumer (10%) → Secondary consumer(1%) → Tertiary consumer (0.1%).

Therefore, If producers receive 1,000kcal of energy from the sun, the energy received by the tertiary consumers in that energy pyramid is 1kcal.

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Answer:

C. Distinguished by eight bands of cilia.

Explanation:

Ctenophora, also known as comb jellies, represents a phylum of transparent, mostly pelagic, invertebrate marine animals that live around the world. This group characterized by eight rows of cilia (singular cilium) that are used for locomotion. Cilia are organelles and/or structures that extend from the surface of eukaryotic cells, which can be used to move the surrounding fluid, resulting in cell movement. This phylum is divided into two classes: Tentaculata (with tentacles) and Nuda (without tentacles).

Answer:

A

Explanation:

its a

The most likely explanation here is that mitochondria was once a prokaryotic organism. The correct option is A.

Mitochondria are membrane-bound cell organelles that produce the majority of the chemical energy required to power the cell's biochemical reactions (mitochondrion, singular).

The mitochondrial energy is stored in a small molecule known as adenosine triphosphate (ATP).

Mitochondria are special compartments (organelles) in our cells best known for their role as powerhouses, converting food molecules into ATP, a molecular fuel for the rest of the cell.

Mitochondria and chloroplasts most likely evolved from engulfed prokaryotes that were once self-contained organisms.

At certain point, an aerobic prokaryote was engulfed by a eukaryotic cell, which then formed an endosymbiotic relationship with the host eukaryote, eventually developing into a mitochondrion.

Thus, the correct option is A.

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Answer:

About 95 percent of the skin cells in the epidermis are devoted to creating new skin cells in the lower two levels of the epidermis, which then cycle to the top layer to help form the stratum corneum. Eventually the dead cells of the stratum corneum flake off as new keratinocytes move up, and the cycle repeats itself.

Hope this answer is right!!

Answer:

these r so many which one?

Explanation:

Answer:

Eukaryotes have nucleus, Archaea do not have.

but Archaea have DNA that's not in nuclues.

Eukarya possess organelles in membrane whereby Archaea do not possess membrane around organelles.

Answer: Eukaryotes have a nucleous

Explanation:

Answer:

releasing venom from the skin

Answer:

d. our populations of radishes were small

Explanation:

Natural selection is a type of evolution that allows only individuals with favorable characteristics and better adapted to the environment to survive and reproduce offspring with the same favorable characteristics. In this case, to observe a population where natural selection is taking place, population sizes can be disregarded, as this is not a condition for natural selection to take place. However, the other conditions presented in the response options are necessary for natural selection, since it is necessary that there are different phenotypes and genotypes in the population and that competition between them promotes the survival of one group at the expense of the other.

Answer:

B.) water mold

Explanation:

The water mold is a filamentous fungus like organisms that lives in  brackish water, fresh water or wet soils. They are saprophytic, that is, they live on dead organisms. Their reproduction is usually by motile asexual spores (zoospores).The zoospores are of two types namely pear-shaped with apical flagella and kidney-shaped with two flagella on the concave side. Water mold are usually identified by their zoospores.

Answer:

The cell is replicating its organelles and DNA. It's basically growing to prepare for mitosis.

Explanation:

Answer:

d

Explanation:

provides animals with homes letting them breed

It helps maintain forest biodiversity. Therefore, option (D) is correct.

One advantage of growing coffee in the shade is that it helps maintain forest biodiversity. By growing coffee trees in the shade of taller forest trees, farmers preserve some habitat for forest birds and other organisms, which can help to maintain the overall biodiversity of the forest ecosystem.

This is particularly important in regions where forests are being cleared for agricultural purposes, as it can help to mitigate the negative impact on the environment.

While shade-grown coffee may produce fewer coffee beans than trees grown on cleared forestland or in full sun, it provides important ecological benefits that are not captured by purely economic considerations

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Answer:

0.05 mg/mL  ( B )

Explanation:

Given data:

20 mg/ml starch

2% solution = 2g of solute is in 100g of solvent

Determine the new concentration in mg/ml

Dilution equation = C1V1 = C2V2

new concentration ; applying the dilution factor

dilution factor = 1 : 400 ; ( 2 /400 )g = 0.005 g of solute is present in every  100 mL

∴ new concentration = 0.00005 g / 1 mL * ( 1000 mg / 1g ) = 0.05 mg/mL

Answer:

7.9 billion

in June 2021 to the United nations Estimated elaborted by worldmeter.

Answer:

A. resources use by humans will be higher in 20 years than it is now

B. resource used by humans is much higher now than it was 200 years ago

Explanation:

The growth of the human population has direct relation with the use of natural resources by humans means if the population of humans increases, more natural resources will be consumed by the population. Directly relation means if one increases the other automatically and vice versa. more population needs more resources for their growth  and survival so we can conclude that resources used by humans will be increases if the population increases.

Answer:

O Non-water soluble macromolecules with a high proportion of hydrocarbons

Explanation:

Carbohydrates are one of the four biological molecules in nature (asides from proteins, nucleic acid, and lipids). Carbohydrates are a complex polymer consisting of several chains of carbon and hydrogen (hydrocarbons).

According to this question, carbohydrates are non-water soluble macromolecules with a high proportion of hydrocarbons.

Answer:

c. The researcher had crossed two heterozygous plants.

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

Answer:

I think it's probably 2,3, and 4 :))

Answer:

renewable resources can be replenished.

most renewable resources are easily available in nature.

all renewable resources are cost effective.

Answer:

Marine biotechnology may include techniques such as bioprocessing, bioharvesting, bioprospecting, bioremediation, using bioreactors etc (so called process biotechnology techniques); aquaculture/fisheries; gene, protein, or other molecule based techniques; while applications may include: health, food, cosmetics

Answer:

Bonds are both broken and made in chemical reactions but many biology teachers and textbooks state that "Breaking ATP bonds releases energy." In reactions bonds are broken and made. If the strength of the bonds formed exceeds the strength of the bonds broken the reaction is exothermic.

Explanation:

Hope this helps. :)

Answer:

Carnivorous

Explanation:

The wolf, also known as the gray wolf or grey wolf, is a large canine native to Eurasia and North America. More than thirty subspecies of Canis lupus have been recognized, and gray wolves, as colloquially understood, comprise non-domestic/feral subspecies. Wikipedia

Answer:

Acorns would be found at the first trophic level of a food chain.

Explanation:

Answer:

sunlight into energy

Explanation:

Answer:

1.someting that causes directly, development, interest.

2.an answer to somebody something

3.directional movement of particular part of a plant in response to environmental stimuli

4. carbon dioxide, oxygen

5. allow for the uptake of carbon dioxide anf to limit the loss of water due to evaporation