Len was alone, in a strange place, in a new situation, feeling afraid. His body reacted by producing the hormone adrenalin. How did the adrenalin make Len feel?


He began to feel happy and cheerful.
or he felt calm and at ease.
Or He became shaky and his heart thumped.
Or He didn’t feel any different.

Final answer:

When crossing a homozygous and heterozygous blue flower (dominant blue, recessive white), the offspring ratio will be 0 white: 4 blue. Other answers detail that a Punnett square is not a complex pattern of inheritance, chromosomes do not contain cells, proteins are synthesized with the help of RNA, replication is not a mutation type, and children have a 25% chance of inheriting cystic fibrosis from two heterozygous parents.

Explanation:

When two blue flowers are crossed, one being homozygous and the other heterozygous for flower color, with blue as the dominant allele and white as recessive, the ratio of colors in the offspring plants will be 0 white: 4 blue. This is because the presence of at least one dominant allele (representing the blue color) in the offspring's genotype from either parent will produce a blue phenotype in all offspring.

A Punnett square is NOT an example of a complex pattern of inheritance; it is a diagram used to predict the genotype and phenotype outcomes of a genetic cross. Complex patterns of inheritance include incomplete dominance, multiple alleles, and polygenic inheritance which involve more nuanced relationships between alleles.

The part NOT found in a chromosome is cell. Chromosomes are made up of deoxyribonucleic acid (DNA) and proteins, with specific segments of DNA coding for various genetic traits.

Proteins are made with the help of RNA. During transcription, DNA sequences are transcribed into messenger RNA (mRNA), which is then translated into proteins.

Among the options provided, replication is not a form of mutation. Mutation forms include substitution, insertion, and deletion, all of which directly alter the DNA sequence.

If two people are heterozygous for cystic fibrosis, the chances that their children will have the disease is 25%. This is because both parents carry one recessive allele for the disease (being heterozygous), and there is a 1 in 4 chance that the child will inherit the recessive allele from both parents, necessary for expressing the disease.

When the air temperature over land is higher than the air temperature over water, the air over land rises due to the lower pressure, hence c is the correct option.

Because when the air temperature over land is higher than the air temperature over water, the air over land rises due to the lower pressure, and air over the ocean in to replace it.

The land surface warms up more quickly than the sea surface during the day, just to refresh your memory, warmer air is lighter than colder air.

Throughout the day, there can be large variations in the air temperature over the land.

Therefore, always higher than air over the ocean are air temperatures over land, hence c is the correct option.

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In an open system like a campfire, matter can exchange with its surroundings, transforming into different substances while conserving mass.

In an open system, such as a campfire, matter can exchange both matter and energy with its surroundings. During this process, matter such as wood combines with oxygen and transforms into ashes, carbon dioxide, and water vapor. The heat energy released can be used for cooking food or providing warmth. The total mass of matter remains constant as it changes forms, adhering to the law of conservation of mass.

Answer;

Colloid

Fog is a colloid composed of water droplets in air.

Explanation;

-Fog is made up of condensed water droplets which are the result of the air being cooled to the point where it can no longer hold all of the water vapor it contains.

-A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension. A fog is an example of a colloid as a beam of light can be easily seen passing through it.

Answer:

It is mollusks

Explanation:

I just did the quiz and it was 100%

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The correct answer is (b) Circulatory system

The circulatory system transports the oxygen throughout the system. The deoxygenated blood is carried from other parts of the body to the lungs and the exchange of gases takes place. The oxygenated blood from the lungs is carried to other parts of the body. Only 1.5% of oxygen is transported through this system other 96% of the oxygen is transported by combing with pigment called hemoglobin. This hemoglobin also an important of circulatory system that helps in purifying the blood.

Answer:

B) Circulatory System

Explanation:

The chemical property as well as physical one is determined by the arrangement of the mineral's atoms. The correct option is A.

A chemical property is any property of a material that emerges during or after a chemical reaction.

That is, any quality that can only be established by changing a substance's chemical identity.

A physical property is a property of a substance that can be observed or measured without changing the substance's identity.

Color, density, hardness, and melting and boiling points are examples of physical properties.

The atomic structure and crystal chemistry of minerals determine their physical properties.

Crystal form, color, hardness, cleavage, and specific gravity are the most common physical properties.

Examining a mineral's crystal form is one of the best ways to identify it.

Thus, the correct option is A.

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Answer:

The bottom half

Explanation:

The lower half  part of the iceberg displaces water equal in weight to the buoyant force.

When an object is placed in a fluid, the fluid exerts an upward force we call the buoyant force. The buoyant force comes from the pressure exerted on the object by the fluid.

Because the pressure increases as the depth increases, the pressure on the bottom of an object is always larger than the force on the top - hence the net upward force.

The buoyant force is present whether the object floats or sinks. The object experiences forces on each of its six sides. On each side, the force is the pressure multiplied by the area of the side, and is directed perpendicular to the side and toward the inside of the object.

Therefore, The lower half  part of the iceberg displaces water equal in weight to the buoyant force.

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Answer:

The pure tall plant has equal alleles (AA or aa) while the hybrid tall plant has one dominant and recessive allele (Aa).

Explanation:

When we say that an organism is pure, we mean that it is homozygous. In this case we are saying that, for a given trait, its alleles are equal. This means that the allele is occurring in double dose in that organism and, consequently, the gametes generated by it will be equal. A pure tall plant has alleles equal to "AA" or "aa".

When we refer to hybrid organisms, we are referring to heterozygous organisms. In this case we are saying that, for a certain characteristic, the alleles are different. For this reason, in gametogenesis, it is possible to observe the presence of two distinct gametes. A hybrid tall plant has different "Aa" alleles.

The answer is unbalanced forces!

Answer:

the answer is D

Explanation:

D) The broad leaves provide surface area to catch light.

Rainforests are tropical forests that receive a high amount of rainfall, typically more than 200 cm per year. They are found in regions near the equator, where the climate is warm and humid. Rainforests are characterized by their dense canopy of tall trees, which can reach up to 60 meters in height. The high rainfall and warm temperatures create a rich and diverse ecosystem, with numerous plant and animal species living in the forest.

Rainforests are also known for their lush undergrowth, including shrubs, ferns, and vines. They play a critical role in the global climate, as they absorb and store large amounts of carbon dioxide, and are also important sources of oxygen. However, rainforests are facing severe threats from human activities such as deforestation and conversion of land for agriculture, which can lead to loss of biodiversity and other negative impacts on the environment.

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Answer:

Explanation:

As we know, atoms are the smallest particles of matter and represent the true creators of matter and everything that occupies space and has mass. Atoms are composed of electrons, protons and neutrals.

Electrons allow one atom to interact with another, forming bonds that allow something tangible to be created. This interaction can occur in three ways:

Answer:

(1) Inversion of temperature in the atmosphere refers to the changing of the temperature with respect to the elevation. The atmosphere of the earth is divided into-

(a) Troposphere- It covers a distance from the ground surface to a height of about 10-15 km. Here, the temperature decreases with altitude.

(b) Stratosphere- It extends from the height of about 15 km to 50 km and here the temperature increases with the increasing altitude. The ozone is layer is present here.

(c) Mesosphere- It covers a vertical height from about 50 km to 80 km and here the temperature again decreases with height.

(d) Thermosphere- It covers a height from about  80 km to 500 km and the temperature rises with altitude.

(e) Exosphere- It represents the outer part of the atmosphere extending up to space and the region experiences increasing temperature.

(2) This temperature inversion takes place in all the layers of the atmosphere. There is a gradual increase and decrease in temperature from the troposphere to the thermosphere layer.

(3) When the air near the surface of the earth gets heated up, it becomes hot, less dense and the air rises up. As the air rises up, the air cools increasing its density forming a convective cell and clouds are generated. This air when accumulates at the top forms a region that separates from the overlying layer. This causes the temperature inversion in the layers of the atmosphere.

Lactic acid fermentation is most likely to occur during a very fast run, as the intense activity causes muscles to run out of oxygen and switch to fermentation to produce energy.

Lactic acid fermentation is most likely to occur under conditions where the muscles have run out of oxygen and need to find an alternative way to produce energy. Among the options provided, A. A very fast run is the condition under which lactic acid fermentation is most likely to occur. When muscles are used to the point of fatigue, such as during an intense activity like a sprint, there isn't enough oxygen supplied to the tissues to meet the high energy demands. This causes the muscle cells to switch from aerobic respiration to lactic acid fermentation, a process where pyruvate is reduced to lactate by NADH, thus regenerating NAD+ which allows glycolysis to continue producing ATP.

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Answer:

Succulent plants store water in fleshy leaves, stems or roots. Several other adaptations are essential for the water storing habit to be effective.

Explanation:

Answer:

a. Australopithecine Afarensis

Explanation:

With a skull of 3 million years, scientists have been able to prove the existence of Australopithecus afarensis, the oldest ancestor of humanity. 4 million years ago, humanity did not exist. But at least one creature bore in its bones what would be the hallmark of Homo sapiens. Australopithecus afarensis, that creature's name, had a tiny brain. But it stood like no monkey could do, representing an ancestral trait that would be passed from generation to generation to modern man.