4. State the use of scales to the body of a fish?​

Answer:

its called the enzyme pectinase

Explanation:

it speeds up up the breakdown of pectin in fruits producing more juices

Answer: Codons

Explanation: Three neighboring nucleotides form a unit known as the codon.

Answer: B

Explanation:

Answer:

C exposure to radioactive elements

Explanation:

The main concern of using nuclear power is the radioactive elements it creates. An example would be uranium.

Sure natural gas is bad for the environment but its no where near as harmful as exposure to radioactive

Drilling for oil does not release radioactive elements therefore exposure to radioactive elements can only be caused by nuclear power.

Primary succession occurs after the occurrence of a severe event that leaves nothing but rocky surfaces. Option B. Lichens will grow on the cooled lava.

The succession term refers to colonization and subsequent changes.

Colonization has been defined as the sequence of events that conduce to the establishment of individuals, populations, species, or bigger groups in areas where they were absent before.

Succession refers to changes produced in the composition and structure of communities after a perturbation. There are different grades of succession according to the perturbation intensity.

In primary succession, the perturbation is so intense that it eliminates all the life forms in the area.

It is the sequence of species appearance in an exposed area that has not been influenced by any other species or community before.

In these cases, the rock gets exposed but it can not be colonized directly. The new area needs to suffer erosion and different chemical and physical processes that fragment, degrade and dissolve the rock to make colonization possible.

Primary succession occurs after severe events affecting a region, such as a retreating glacier, a volcanic activity, or an intense fire that leave nothing but the exposed rock.

After the disturbance, the order of the living beings establishment depends on the strategies of each of the species to survive.

First, pioneer species arrive. These are the first inhabitants, mostly lichens or plants with the capability of surviving in such an environment. Only a few pioneers can establish in the open space.

Pioneers modify the habitat. They make it more suitable for the posterior establishment of later species, converting rock into fertile soil. As conditions get better, new species arrive like grasses.

Grasses and pioneers keep modifying the ground and making it better with time.

Habitat modification keeps on going while new species establish. They produce shadows and alter the temperature, and humidity, fertilizing the soil.

Competition becomes more frequent between species. The first species are eventually eliminated by competition, while new species keep appearing and competing for resources.

This sequence continues until there is no more facilitation, and the communities reache a climax, becoming stable and lasting for hundreds of years until another disturbance occurs.

In the exposed example, the severe event affecting the Hawaii's Big Island was a volcanoe eruption.

The most likely event observed first in the areas covered by lava would be Lichens will grow on the cooled lava. Option B

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Yeah the kids will most likely be brown the phenotypes would be Bb (heterozygous dominant)

Answer:

I think, the egg. Not so sure about it.

Eggs come from chickens and chickens come from eggs: that’s the basis of this ancient riddle. But eggs – which are just female sex cells – evolved more than a billion years ago, whereas chickens have been around for just 10,000 years. So the riddle is easily solved…or is it?

Taken at face value, there is no doubt that the egg came before the chicken. We tend to think of eggs as the shelled orbs laid by birds from which their chicks hatch – unless we eat them first. But all sexually reproducing species make eggs (the specialised female sex cells). That’s 99.99 per cent of all eukaryotic life – meaning organisms that have cells with a nucleus, so all animals and plants, and everything but the simplest life forms.

We don’t know for sure when sex evolved but it could have been as much as 2 billion years ago, and certainly more than 1 billion. Even the specialised sort of eggs laid by birds, with their tough outer membrane, evolved more than 300 million years ago.

As for chickens, they came into being much later. They are domesticated animals, so evolved as the result of humans purposefully selecting the least aggressive wild birds and letting them breed. This seems to have happened in several places independently, starting around 10,000 years ago.

The wild ancestor of chickens is generally agreed to be a tropical bird still living in the forests of Southeast Asia called the red junglefowl –  with other junglefowl species possibly adding to the genetic mix. From these origins, humans have carried chickens around the world over the past two millennia or more.

So, eggs dramatically predate chickens. But to be fair to the spirit of the riddle, we should also consider whether a chicken’s egg predates a chicken. As humans consistently chose the tamest red junglefowls and bred them together, the genetic makeup of the resulting birds will have shifted. At some stage during this domestication process the red junglefowl (Gallus gallus) evolved into a new subspecies, Gallus gallus domesticus, AKA the chicken.

In practice, it is impossible to pinpoint the moment when this happened. But in theory, at some point two junglefowl bred and their offspring was genetically different enough from the species of its parents to be classified as a chicken. This chicken would have developed within a junglefowl egg and only produced the very first chicken’s egg on reaching maturity. Looked at this way, the chicken came first.

Answer:

B. 25%

Explanation:

There are 3 out of 4 chances the flower will be white because the white is a dominant trait, this leaves 1 out 4 chances for the flower to be purple.

Note: Drawing punnet squares can help you find the possible genotypes.

Answer:

animals

Explanation:

earthworm which is in soil

Aloe vera, Christmas cacti, neem, orchids, and other plants can be found in the lithosphere.

The solid outer layer of Earth is known as the lithosphere. The Earth's outermost layers, the crust and the brittle upper part of the mantle, are together referred to as the lithosphere.

The asthenosphere, another component of the upper mantle, and the atmosphere form its boundaries.

Lithosphere Together, the upper mantle and crust make up the outermost layer of the planet. The lithosphere is home to a variety of plants, including aloe vera, Christmas cacti, neem, orchids, and others.

The lithosphere includes a wide variety of animals. There exist microorganisms, underground organisms, animals that live on the ocean floor, as well as land animals including tigers, lizards, and moles.

Thus, these are the plants that lives in lithosphere.

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Answer:

The short answer is, yes and no. There's only a handful of animals like mammals or birds that have a parasitic relationship; one such is the Vampire Bat, yes, although one could argue it could also be considered a form of hunting too.

Explanation:

Answer:

mammals. are essentially all insects and their allies which live on the skin or in its superficial layers. The latter consist of one-celled animals or protozoa, and vari- ous types of parasitic worms, as well as certain insects and their allies.

Answer:

at night, the plants uptake oxygen and release carbon dioxide, which is called respiration

Answer:

This would be an example of nonpoint source pollution.

Explanation:

The source of point source pollution is typically factories and powerplants, leading to more air and water transferred pollutants and becoming easier to track. Nonpoint source pollution is the opposite of point-source pollution, with pollutants being released in a wide area. Since the rainwater would be washing the oils and particles into the water, it would be considered runoff. Runoff is one of the leading causes of point source pollution. I hope this helps. ^_^

Answer:

D. Meiosis forms four cells all with different genetic material

Explanation:

They are haploid cells and each cell only had one set of chromosomes. Meiosis results in variation.

Answer:

the first one

Explanation:

So the predicted offspring genotypes are 50% Hh and 50% hh

so there is a 50% chance that they will have no horns and and aa 50% chance that they wont

Answer:

Explanation:

Organic molecules are the molecules which exist in all living things. They are life's building blocks. All things are formed from these organic molecules.

Answer:

E) All of the above

Explanation:

Malaria, is caused by mosquito bites, and mosquito's follow warmth, so if climate changes to warm really quickly more people are likely to get malaria. Skin cancer can be caused by sun radiation, or staying in the sun for to long, so if climate changes again to really warm, you can get skin cancer if not careful. If your to hot you can go in hypothermia shock. And if the elevation increases or decreases to quick you can get elevation sickness. All of these options change, because of the climate around them, therefore the answer is E. I hope this helps :)

Answer:

sorry

Explanation:

hindi ko po Alam same din nga tayo

Answer:

This is what I would say:

Hello, today I will talk to you about invasive species and why they should be stopped, invasive species are bad for the environment because they destroy other creatures, like if the native species think that it's prey and decide to eat it; it might harm them. For example, if there were trees in a certain environment and an invasive species came along every creature would get hurt because those trees are very tall and they stop sunlight from reaching the ground so that would help to stop invasive plants from growing but if an invasive species of beetles came along they would eat the trees and kill them making sunlight reach the ground. Then it would help the invasive plants to grow, and what would the invasive species of plants do you ask? They would harm the creatures because there are herbivores and they eat plants and since they might think that the plant is toxic because they look like a toxic plant in that environment they will starve and die. Little by little the animals would get harmed because predators eat the herbivores and if there's no food for them they will die, so you see a lot of creatures would get harmed if we don't stop invasive species.

P.S. maybe you should change the words a little because I used this in previous work.

Answer:

B: student B

C: He must have either the same mass or the gravity must be equal to [M(a)xG(a)]/M(b)= (25 x 10)/30=250/30=8.33

Answer:

High amounts of mitochondria are found in skeletal muscle cells, as well as liver cells. On the other hand, skin cells have a small amount of mitochondria.

Answer:

The correct anwser is D. Signals inside the spinal cord

Explanation:

hope this helps :)

Answer:

There is overall agreement that volcanic sulphate aerosols in the stratosphere can reduce solar radiation reaching the earth's surface for years, thereby reducing surface temperatures, affecting global circulation patterns and generally the global climate system.

Answer:

answers are:

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Answer:

The cell will swell and burst because, when the cell is swelling it wont have an effecton the solute concentration outside the cell.

Answer: You might experience cold/winter weather because

Explanation: Atlantic ocean is pretty cold and as cold air rise up in the air making the atmospher kinda cold even when its near the equator.... because you are on a ship and you will only feel cold weather.

Answer:

5

Explanation:

The object distance Is 20 I'm

The image distance is 6.666

Therefore the focal length can be calculated as follows

1/f = 1/20 + 1/6.66

= 6.66+20/133.2

= 26.66/133.2

1/f= 26.66/133.2

f = 133.2/26.66

= 4.99

= 5

Hence the focal length is 5

Answer:

What ?

Explanation:

Answer:

nope c

Explanation: