please help me in Science grade 8th

Answer:

Carbon dioxide , water and water

Answer:

1. adrenaline

2. cortisol

3. aldosterone

4. epinephrine

Answer:

Typically, the nucleus of a cancer cell is larger and darker than that of a normal cell and its size can vary greatly. Another feature of the nucleus of a cancer cell is that after being stained with certain dyes, it looks darker when seen under a microscope

Explanation:

In contrast to normal cells, cancer cells don't stop growing and dividing, this uncontrolled cell growth results in the formation of a tumor. Cancer cells have more genetic changes compared to normal cells, however not all changes cause cancer, they may be a result of it.

Explanation:

Amphibians are sensitive biological indicators of environmental circumstances such as habitat loss, pollution of the air and water, ultraviolet (UV) radiation, and temperature change.

The variety and variability of life on Earth is referred to as biodiversity or biological diversity. A measure of variation at the genetic, species, and ecosystem levels is called biodiversity.

Biodiversity refers to the variety of all the diverse species of organisms that dwell on our planet, including the plants, animals, insects, and microorganisms.

Each of these things exists in a delicate balance and coexists with the others in ecosystems that nourish and sustain life on earth.

Amphibians are sensitive biological markers of changes in environmental conditions like temperature, UV radiation, habitat loss, and air and water pollution.

Thus, scientists believe that threats to amphibians present a warning about a number of environmental threats to Earth's biodiversity.

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Answer:

Yes this fact is true

Explanation:

I hope this helps

Answer:

Mammal 2 and 4 are most related, why?

Explanation: They have TCT, CAG, CTG and CA, the only ones it doesn't have is the last ones, A and G, making it the only difference. 1 has 2 differences to 2, 3 differences to 4, and 3 has 2 differences as well, therefore 2 and 4 have the least differences.

Answer:

2 and 4

Explanation:

You can see their patterns match except for the last letters of 2 and 4

Answer:

Yes; When the cell grows larger,, it needs more cell membraine to prepair for mitosis. Without this process, the cell would rupture.

Yes; The cell would not be able to grow if the surface area stayed the same.

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Answer:

Food and habitat resources

Explanation:

Ecosystems are communities that animals and organisms fight and survive in.

Answer:

bro ide man i can't even tell you man iExplanation:

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Should ever come back...Should ever come back....

Answer:

Nasal Caviry

Trachea

Pharynx

Bronchi

Bronchioles

Aveoli

Capillaries

Answer:

Explanation:

Un cambio en la secuencia de bases en el ADN o ARN se conoce como mutación . ¿La palabra mutación te hace pensar en ciencia ficción y monstruos con ojos de insecto? Piensa de nuevo. Todos tienen mutaciones. De hecho, la mayoría de las personas tienen decenas o hasta cientos de mutaciones en su ADN. Las mutaciones son esenciales para que ocurra la evolución. Son la fuente principal de todo el material genético nuevo -nuevos alelos - en una especie. Aunque la mayoría de las mutaciones no tienen efectos en los organismos en que ocurren, algunas mutaciones son beneficiosas. Incluso las mutaciones dañinas rara vez causan cambios drásticos en los organismos.

Answer:

   well cutting down trees  using  chemicals burning foccle fules

Explanation:

Answer:

How did tortoises and birds differ among the islands of the Galapagos? The tortoises on the Galapagos Islands all had different shaped shells; therefore they were different species of the same category of tortoises. ... Darwin found several types of small, ordinary brown birds.

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Explanation:

Answer:

1 , 11 and 111 are correct

Answer:

Archosauria (the "ruling reptiles") is a major group of diapsids, differentiated from the other diapsids by the presence of single openings in each side of the skull, in front of the eyes (antorbital fenestrae), among other characteristics. This continues the tetrapod trend of the reduction of skull bones by the fusion of multiple bones and the opening of fenestrae in the skull. This helps to lighten the skull, provides more room for muscles and other tissues, and allows more skull flexibility (kinesis) when eating. Other typical archosaurian characteristics include another opening in the lower jaw (the mandibular fenestra), a high narrow skull with a pointed snout, teeth set in sockets (called thecodont tooth implantation), and a modified ankle joint.

Diapsids ("two arches") are a group of amniote tetrapods that developed two holes (temporal fenestra) in each side of their skulls about 300 million years ago during the late Carboniferous period.[1] The diapsids are extremely diverse, and include all crocodilians, lizards, snakes, tuatara, turtles, and birds.[2] Although some diapsids have lost either one hole (lizards), or both holes (snakes and turtles), or have a heavily restructured skull (modern birds), they are still classified as diapsids based on their ancestry. At least 7,925 species of diapsid reptiles[3] exist in environments around the world today (nearly 18,000 when birds are included).

Reptilia, presented as a Class in our classification, includes turtles (Testudines), snakes and lizards (Lepidosauria), crocodiles and their relatives (Crocodilia), and birds (Aves), as well as a number of extinct groups.

Explanation:

I hope this information helps!

If not, I can do some further research if you'd like :)

Answer:

I believe they are  Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.

Explanation:

Answer: I need more information to answer.

Explanation:

Answer:

B. point

Explanation:

A point mutation changes only a single base. Hope it helps you !!

Answer:

The growth rate is 20+ Falcons are born per year.

Explanation:

Hope this helps!

Answer:

Population in the world is currently (2020) growing at a rate of around 1.05% per year (down from 1.08% in 2019, 1.10% in 2018, and 1.12% in 2017). The current average population increase is estimated at 81 million people per year. Annual growth rate reached its peak in the late 1960s, when it was at around 2%.

Explanation:

Answer:

D.

Explanation:

if the force of inertia disappeared there would be no changes in earth's orbital path.

the reasons is that earth would stop moving as soon as there was no longer any force being applied

Answer:

tanungin mo guro mo hahahah

In vascular system of plant do the tissues xylem and phloem work

false

Explanation:

its a living organism

Answer:

The range of waves that includes radio waves, microwaves, infrared, visible light, ultraviolet light, X-rays and gamma rays is called

electromagnetic energy/spectrum.

Answer:

Beside the intensive loss of forest cover [2], fragmentation of the pristine remnants further affects species [3] and limits their ability to move into adequate areas. Thus the ability to cope with altered landscapes is crucial for the persistence of a species, especially in the face of climate change.

Answer:

Explanation:

1: Is symbiosis

2: is eutrophication

3: Predation

4: Trophic efficiency

5: Greenhouse effect

6: Nutrient cycling

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Answer: maritime tropical air mass

Explanation: The oceanic tropical air mass regularly creates a warm, muggy climate in the mid-year. The air mass begins from over the warm water of the jungles and Gulf of Mexico, where warmth and dampness ordinarily move to the air above from the water beneath.