Ava’s best friend has an indoor cat. Ava notices that she sneezes every time that she visits her friend. Ava suspects that she is allergic to cats but is unsure. What is the best thing for Ava to do next?

Answer:

A.weather balloon; electroscope

The area where the land meets the sea is called the coastline. This area can have different physical features depending on its location. Some common features of coastlines are beaches, cliffs, bays, harbors, estuaries, and dunes. Beaches are made up of loose particles like sand and gravel that are deposited by the sea.

Answer:

Solid and gas

Explanation:

Answer:

39

Explanation:

Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.

1. print fossil

2. carbonized fossil

3. petrified fossil

4. cleavage

5. landform

6. igneous

7. metamorphic

8. print fossil

9. geology

10. sedimentary

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The print fossil, original-remains fossil, petrified fossil, carbonized fossil, landform, igneous, metamorphic, sedimentary, cleavage, and geology are the respective matches as given in the question.

Print fossil is imprint of plant or animal and basically known as fossil impression. Original-remains fossil comprises of the original tissues and parts of  organism and undecayed plant or animal part. Petrified fossil is replaced by a mineral. Carbonized fossil is only carbon remains. Landform is a mountain. Igneous is from magma.

Metamorphic is from physical and chemical changes. Sedimentary rocks are sandstone. Cleavage helps to identify rocks. Geology is the study of science of earth.

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Answer:

1

Explanation:

Answer:

1. heat and pressure

sedimentary to metamorphic is heat and pressure

2. compaction and cementation

sediment to sedimentary rock is compaction and cementation

3. weathering and erosion

igneous rock to sediment is weathering and erosion

Explanation:

Weight is 120 pounds and mass is 54 kg

The mass of an object is same everywhere. If we were on the moon, its mass will remain to be 54 kg.

Weight of an object is given by :

\(W=m\times g\)

g is acceleration due to gravity on that surface

For moon, it is 1/6 the gravitational  force on Earth, g = 1.63 m/s²

1 pound = 4.45 N

It means my weight is 533.78 N

On the surface of Moon is will be :

\(W=\dfrac{533.78}{1.63}\\W=327.47\ N\)

Answer:

+6.

Explanation:

So, a chromium atom here has an oxidation number of +6.

Answer: the answer is B. liters

Answer:

meteorites are inside Earth's atmosphere on the ground

meteors are outside Earth's atmosphere

Explanation:

When meteoroids enter Earth's atmosphere (or that of another planet, like Mars) at high speed and burn up, the fireballs or “shooting stars” are called meteors. When a meteoroid survives a trip through the atmosphere and hits the ground, it's called a meteorite.

Answer:

Weather, Time, and Altitude

Explanation:

Let us go option by option :

1) Genes are located in chromosomes. TRUE

Chromosomes are in cell nucleus. A chromosome contains hundreds and thousands of genes. A normal have 23 pairs of chromosomes, and a total of 46.

2) Chromosomes are the in nucleus.

TRUE

Chromosome is structure found in nucleus of the cell. It is made up of protein and DNA.

3) A single Chromosome can contain hundreds of genes.

TRUE

single Chromosome can contain hundreds of tgenes.

4) All of the above

TRUE

As all the statements above are true. The correct option is 4.

Answer:

all of them are true

Explanation:

this is because chromosomes contain genetic materials and it is present in the nucleus.
Therefore, the correct option is 4) all of these are true

no problem

Answer:

Genetic factors contributes to the formation of the dead zones is by their ability to expand their abilities that enables them to spread and contribute to the formation of the dead zones. These dead zones are made when the oxygen are low where it is necessarily important for the aquatic life, if the oxygen needed is depleted or too low, instead of supporting aquatic life, dead zones are created and factors contribute to these occurrences with their ability to expand.

Explanation:

Answer:

The creosote bush has genes that give it the ability to capture and hold water. These plants have developed a root system that is very good at absorbing water, preventing them from being crowded by other desert plants. Seeds that fall nearby cannot get enough water to sprout. This creates dead zones around every creosote bush.

Hop it helped :)

Explanation:

Coniferous trees have needles instead of leaves. These pointy protrusions come in a range of sizes, shapes and thicknesses, but they all are visibly different from leaves. A conifer typically grows in more northern climates, which is why they are so common in Ontario

Answer:

moles of N

4.04 g / 14.01 = 0.288

moles of O

11.46 / 16 = 0.72 moles

divide both of them by the lowest number of moles to get the ratio

0.288 / 0.288= 1

0.72 / 0.288 = 2.48

now multiply both by 2, to make it a whole number =

ratio = 2 : 5

empirical formula = N2O5

the molar mass of the compound = 108.01

molar mass of the empirical formula = 108.02

when you divide this to get the factor the factor is also 1, so you dont really change anything

FORMULA = N2O5

Explanation:

I had it written done from my school notes

I really hope this helps

Answer:

X=Mc2 i think i really have no clue

Explanation:

Answer:

\(\large \boxed{\text{4.21 mol}}\)

Explanation:

We must do the conversions :

mass of Zn ⟶ moles of Zn ⟶ moles of ZnO

We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

Mᵣ:     65.38

              Zn + … ⟶ ZnO  + …

m/g:   275

(a) Moles of Zn

\(\text{Moles of Zn} = \text{275 g Zn}\times \dfrac{\text{1 mol Zn}}{\text{65.38 g Zn}} = \text{4.206 mol Zn}\)

(b) Moles of ZnO

The molar ratio is 1 mol ZnO:1 mol Zn

\(\text{Moles of ZnO} =\text{4.206 mol Zn} \times \dfrac{\text{1 mol ZnO}}{\text{1 mol Zn}} = \text{4.21 mol ZnO}\\\\\text{The reaction produces $\large \boxed{\textbf{4.21 mol}}$ of ZnO}\)

Answer:

Answer: 12

Explanation:

\({ \sf{3Na _{2} O +2 AIBr _{3} \rightarrow 6NaBr + AI _{2} O _{3} }}\)

\({ \tt{sum = 3 + 2 + 6 + 1}} \\ = { \tt{12}}\)

Answer:

12

Explanation:

3+2+6+1

Answer:

Explanation:

There are different types of asexual reproduction:

Binary Fission

Budding

Fragmentation

Vegetative Propagation

Sporogenesis

Binary Fission

The term “fission” means “to divide”. During binary fission, the parent cell divides into two cells. The cell division patterns vary in different organisms, i.e., some are directional while others are non-directional. Amoeba and euglena exhibit binary fission.

It is one of the simplest and uncomplicated methods of asexual reproduction. The parent cell divides into two, each daughter cell carrying a nucleus of its own that is genetically identical to the parent. The cytoplasm also divides leading to two equal-sized daughter cells. The process repeats itself and the daughter cells grow and further divide.

Fragmentation

Fragmentation is another mode of asexual reproduction exhibited by organisms such as spirogyra, planaria etc. The parent body divides into several fragments and each fragment develops into a new organism.

Regeneration

Regeneration is the power of growing a new organism from the lost body part. For eg., when a lizard loses its tail, a new tail grows. This is because the specialized cells present in the organism can differentiate and grow into a new individual. Organisms like hydra and planaria exhibit regeneration.

Budding

Budding is the process of producing an individual through the buds that develop on the parent body. Hydra is an organism that reproduces by budding. The bud derives nutrition and shelter from the parent organism and detaches once it is fully grown.

Vegetative Propagation

Asexual reproduction in plants occurs through their vegetative parts such as leaves, roots, stems, and buds. This is called vegetative propagation. For example, potato tubers, runners/stolon, onion bulbs, etc., all reproduce through vegetative propagation.

Spore Formation

Spore formation is another means of asexual reproduction. During unfavourable conditions, the organism develops sac-like structures called sporangium that contain spores. When the conditions are favourable, the sporangium burst opens and spores are released that germinate to give rise to new organisms.

In asexual reproduction, a single cell is divided to produce offspring. Simple cell-by-cell division is not possible in multicellular organisms. Most of the multicellular organisms have a complex body design. They have a higher level of organization like tissues, organs and organ systems. Thus, they need a special mode for reproduction.

Advantages of Asexual Reproduction

Following are the advantages of asexual reproduction:

Mates are not required.

The process of reproduction is rapid.

An enormous number of organisms can be produced in very less time.

Positive genetic influences pass on to successive generations.

It occurs in various environments.

Disadvantages of Asexual Reproduction

The major disadvantages of asexual reproduction are:

Lack of diversity. Since the offsprings are genetically identical to the parent they are more susceptible to the same diseases and nutrient deficiencies as the parent. All the negative mutations persist for generations.

Since only one organism is involved, the diversity among the organisms is limited.

They are unable to adapt to the changing environment.

A single change in the environment would eliminate the entire species.

Asexual Reproduction Examples

Following are the examples of asexual reproduction:

Bacterium undergoes binary fission in which the cell divides into two along with the nucleus.

Blackworms or mud worms reproduce through fragmentation.

Hydras reproduce through budding.

Organisms such as copperheads undergo parthenogenesis.

Sugarcane can be grown through vegetative propagation.

Answer:

Explanation: The merging of male and female gametes during fertilization and the presence of two parents constitute sexual reproduction. The offspring differ from each other and their parents because they receive a variety of genes from both parents. The benefits of sexual reproduction include the offspring's ability to adapt to new surroundings due to genetic variation, which gives the species a survival advantage.

It is less likely that the disease will impact every person in a group. There is only one parent in asexual reproduction. The children are exact replicas of their parents and one another. Asexual reproduction has several benefits, including When conditions are favourable, the population can grow quickly because only one parent is required.

E. coli and other bacteria reproduce asexually. This has the benefit of enabling them to quickly create large numbers of bacteria. The identical genetic makeup of every microbe is a drawback. Every one of the germs would perish if an antibiotic were applied. There would be no people left. Random mutation is the sole process that can add variation to the population.

The majority of animals, including rabbits, reproduce sexually. Because the alleles that the mother and father each possess are combined in the offspring, sexual reproduction brings variety to the species. The fact that sexual reproduction requires more time than asexual reproduction is a drawback. Before the development of the progeny, a mate must be located and the egg fertilized with sperm. However, the benefits of adding genetic diversity to the species overcome this drawback. Given the diversity in the population, it's possible that not every rabbit would be afflicted if a disease struck the rabbit population. It follows that some people would live and be able to reproduce and have more children.

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Answer:

PHOTOSYNTHESIS IS THE ANSWER

Answer:

I don't know but but i think the answer 2

Answer:

Explanation:

The fossil record is considered to be incomplete because fossilization is a very rare phenomenon. Most organisms decompose quickly after their death, and their remains dispersed. In order for fossilization to occur, the remains have to be covered by sediments and stay undisturbed for thousands of years.

Answer:

The fossil record is considered to be incomplete because fossilization is a very rare phenomenon. Most organisms decompose quickly after their death, and their remains are dispersed. In order for fossilization to occur, the remains have to be covered by sediments and stay undisturbed for thousands of years.

Answer:

Uniformitarianism

Explanation:

Answer:

=B

Explanation:

I think the B is correct answer

Answer:

Maximum velocity is reached when you stop accelerating, because this is when you can't gain anymore speed, i.e. acceleration is zero. In other words the derivative of velocity is equal to zero. However, zero acceleration can also result in minimum velocity because you can't lose any more speed.

Explanation:

hope this helps