Im confused can someone assist me ?

A relatively small region of the upper brainstem that connects the forebrain and hindbrain. It contains the tectum (and associated inferior and superior colliculi), tegmentum, and substantia nigra. Also called mesencephalon.

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Answer:

Feathers initially evolved in a role associated with sexual selection.

Explanation:

In species where only males had feathers, these feathers can be considered to have evolved into a role associated with sexual selection. This is because in these species, males used their feathers as a sexual attraction for females, in this case, females chose the males that had more attractive feathers to mate and generate new individuals for the species. An example of this can be seen in the peacock, where the tail with lush feathers is only present in males and is intended to sexually attract females.

Answer:

Acrophobia ------- intense fear of heights

Ephebiphobia -----the fear of youth

Answer:

hope your day goes great.

Answer:

can you please translate for us into English

Answer:

nalaqdua

Explanation:

sbospka ai9wlhzux5 s8fvekg

Answer:

A

Explanation:

Because it is giving you the same results ( i just did the test and got it right)

Answer:

a.

Explanation:

just took the test

Answer and Explanation:

A. Hello. You did not enter answer options. However, we can state that mutation, natural selection and genetic drift will be the microevolution mechanisms that will affect the gene pool of these humans. This is because the new environment and the small number of living beings, will make this population completely susceptible to all these evolutionary factors, which will affect, in different ways, the gene frequencies in a population.

B. As the amount of living beings and human beings has become very small, the world will have a low genetic diversity. This will make it difficult for these humans to adapt to the new environment and will make them more susceptible to possible diseases that will arise in this new environment. This will make these humans more fragile and make it harder for them to multiply.

C. The evolution mechanism is the Gene Flow. Gene Flow refers to the exchange of genetic information between individuals in a population, through the donation of gametes that occur in reproductive processes. In this case, we can consider that the individual with green eyes, upon arriving in the community with individuals without green eyes, began to reproduce descendants, who, upon receiving the gametes responsible for green eyes, began to populate this community with this characteristic.

Photosynthesis is a chemical reaction that takes place in the chloroplasts of green plant cells, where light energy is used to convert carbon dioxide and water into glucose and oxygen. Option A is the right answer.

Photosynthesis is the process by which green plants prepare their own nutrients with the help of sunlight, water, and carbon dioxide.

Hence Option A is the right answer.

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Answer:

Developing countries don't have lots of industries, so it's not high

Developed nations have a wide variety of industries

Explanation:

Answer:

Plants can cause mechanical and chemical weathering

Explanation:

Plants can cause mechanical and chemical weathering. When plants cause mechanical weathering, their roots grow into rocks and crack them.It can also happen in streets or sidewalks. When plants cause chemical weathering, there roots release acid or other chemicals, onto rocks, which then forms cracks, and breaks apart.

Animal and plant mobility is a factor in biological weathering, for instance, a plant may grow in a gap in a rock and, as its roots spread, cause the fracture to expand.

A rabbit may also burrow into a crack in a rock, making it wider and eventually separating the rock.

Animals and plants can act as mechanical weathering agents. In dirt that has gathered in fractured rock, a tree seed may emerge. The fissures get wider as the roots spread out, finally shattering the rock into pieces.

Even big rocks might get dislodged by trees over time, rocks are broken down by plants like moss that absorb their minerals.

Therefore, holding onto soil and rocks is another way that plant roots cause weathering, and might stop erosion.

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Answer:

boboboboobbb

Explanation:

step by step

Answer:

is a thick band of neural fibers enabling communication between the two brain hemispheres.

Explanation:

A brain can be defined as an organ of soft nerve tissue that is found in the skull of vertebrates and it's typically responsible for the coordination of nervous activities, intellect and sensation.

The human brain consists of various sections and these includes;

I. Anterior Cingulate Cortex (ACC) which resembles a bow or collar surrounding the frontal part of the corpus callosum. This is the frontal part of the cingulate cortex which helps to make complex cognitive functions such as impulse control, decision-making, emotions and empathy.

II. Ventral prefrontal cortex in humans are interconnected with the brain and are responsible for the processing of risk, empathy, fear and social decision-making

III. The Cerebral Cortex: this part of the brain primarily comprises of grey matter, foldable sheets of neurons and forms its outermost layer. Therefore, cerebral cortex is known as the outermost layer of the brain (cerebrum) and thus, makes up half of its weight. It is about 2.5 millimeters in thickness and as such it's able to fold.

The corpus callosum is a large, thick band of C-shaped neural fibers found beneath the cerebral cortex and it's saddled with the responsibility of enabling communication between the two brain hemispheres i.e the right hemisphere and the left hemisphere.

Answer:

water

Explanation:

Answer:

Water

Explanation:

Explanation:

i think it is choloroplast

Answer:

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Explanation:

Cellular respiration is the process in which carbohydrates (Glucose) are broken down into carbon dioxide and water in the presence of oxygen and a lot of energy is released which is further used for ATP synthesis and ATP is released!

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Hope this helped!

Answer:

A genetic factor for a trait that is always expressed when it is present is best described as dominant.

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Answer:

skin acts as a protective barrier, therefore it does not secrete hormones

Skin does not secrete hormones. Thus, the correct option is B.

Hormones may be defined as chemical substances that are produced by the organ system of an organism and transported at the site of action via the bloodstream. Hormones act as messenger molecules in the body.

Skin acts as the primary or first line of defense for the immune system. It does not secrete any hormones. It plays an important role in innate immunity. Ovaries are responsible for the secretion of hormones like estrogen and progesterone in females and regulate all the prospective consequences in the body of females.

The adrenal gland secretes hormones like cortisol and aldosterone which are steroid hormones. Such hormones are important in regulating metabolism, inflammation, immune functions, etc. The Pancreas secretes insulin and glucagon which play an active role in regulating the level of glucose in the blood.

Therefore, the skin does not secrete hormones. Thus, the correct option is B.

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Answer:

well a hypothesis is literally a scientific assumption or theory used to describe what they think is going to happen during a experiment

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Photosynthesis is the process in which green plants derive their food (nutrients and water) through the capturing of light energy (sunlight) and using it to convert carbon dioxide (CO2) and water (H2O) into oxygen (O2) and other substances (compounds) that are rich in energy. Chlorophyll a green pigment present in plants is used in this process.

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Formula ⟶ [tex]\boxed{\bf\:6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2} [/tex]

__________________

So, the products of photosynthesis are [tex]\large\boxed{\boxed{\bf\:C_6H_{12}O_6 + 6O_2}}[/tex]

Answer:

Pacific Ocean

Explanation:

here is your answer

Yes. Every chemical reaction obeys the law of conservation of mass.

Believe it!!

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Answer:

Membrane bounded organelles are present in eukaryotes..

Explanation:

hope it is helpful to ☆☆

Answer:

B. option A 2 daughter cells

C. option D metaphase

Answer:

Q1 B

Q2 D

Q3  D

Q4 D

Explanation:

The cell walls, chloroplasts, and mitochondria play important roles in plant cells, they are not directly involved in building protein molecules under the control of the nucleus. D

Ribosomes are the structures in plant cells that build protein molecules under the control of the nucleus.

Ribosomes are tiny, complex molecular machines composed of RNA and protein molecules.

They are involved in the process of protein synthesis, where they facilitate the translation of genetic information from the DNA in the nucleus into functional proteins.

The nucleus of a cell contains the DNA, which serves as the blueprint for building proteins.

However, the actual synthesis of proteins occurs in the cytoplasm, outside the nucleus.

Ribosomes are responsible for this task.

Ribosomes can be found both freely floating in the cytoplasm and attached to the endoplasmic reticulum (ER).

The ones attached to the ER are called rough endoplasmic reticulum (rough ER) due to the presence of ribosomes on their surface.

These ribosomes associated with the rough ER are involved in the synthesis of proteins that are destined for secretion or for integration into the cell membrane.

The process of protein synthesis involves the decoding of the genetic information stored in messenger RNA (mRNA) by ribosomes.

Ribosomes read the mRNA sequence and assemble amino acids into a growing polypeptide chain, forming a functional protein.

Cell walls provide structural support, chloroplasts are responsible for photosynthesis, and mitochondria are involved in cellular respiration. However, the primary site for protein synthesis in plant cells is the ribosomes.

Therefore, the ribosomes (option d) are the structures in plant cells that build protein molecules under the control of the nucleus.

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