Help help help please

Answer and Explanation:

The brain is composed of three main structures, the cerebrum, cerebellum, and brain stem. The brain sends chemical and electrical signals throughout the body to regulate different biological functions and sense environmental changes. The brain communicates with the majority of the body through the spinal cord.

The best model for these cells would be a sphere (A) since the statement mentions the overall shape of the cell.

A sphere is a three-dimensional geometric solid that is characterized by its curved surface and all points on the surface being equidistant from the center.

Cells often have a rounded or spherical shape, especially when considering single-celled organisms or certain types of cells in multicellular organisms.

While other geometric solids like a right circular cylinder, square pyramid, or cube can be used to represent specific cell structures or organelles, they may not accurately represent the overall shape of the cell itself.

For more such answers on Cells

https://brainly.com/question/13920046

#SPJ8

Ascomycetes have a different life cycle from humans in that they go through mitosis in haploid cells.

A cell with a single collection of chromosomes is called haploid. The complement of chromosomes found in sperm or egg cells, often known as gametes, is also referred to as haploid. In humans, sperm and eggs are haploid cells with 23 chromosomes—one of each chromosomal pair found in diplod cells—and are hence haploid.

Haploid cells are ideal for studying gene function because they only have one copy of something like the genome, making it impossible for changes to be hidden from view. Humans make haploid cells during meiosis.

To know more about haploid cells visit:

https://brainly.com/question/1542757

#SPJ1

Explanation:

The rock cycle is governed by the recycling of mineral phosphates that are found in the form of PO4 3- by plants. it is recycled thanks to Bacteria, plants, detritus interrelated with the mineralization, dissolution, abd decomposition of phosphates.

Answer:

Option B

Explanation:

It is a liquid because it flows.

Carmen's sample of matter is clear, smells sour, thick but flows when poured. The best conclusion about Carmen's sample is that it is liquid.

There are 3 states of matter, basically:

Solid substances do not move or flow in any way because their molecules are fixed.

Gaseous molecules take the shape and the volume of containers

Liquid molecules only take the shape of containers.

Liquid and gases have molecules that can move and be made to flow. However, while gases will flow out automatically from opened containers, liquids cannot, unless they are poured.

Hence, since carmen's sample of matter can only be made to flow when poured, it is safe to conclude that it is a liquid.

More on the states of matter can be found here: https://brainly.com/question/18538345

Explanation:

Water is evaporated into another thin film again from pond sample surface. Over the lake, the thin, humid, moist layer is formed then blends with the colder air from of the land. Condensation happens as it cools, and a cloud emerges. It appears like steam emerging from the sea, thus the 'steam fog' nickname

  Stars are born within the clouds of dust and scattered throughout most galaxies. A familiar example, a dust cloud is the Orion Nebula. Turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction. Stars begin their lives as clouds of dust and gas called nebulae. The gravity of a passing star or the shock wave from a nearby supernova may cause the nebula to contract. Matter in the gas cloud will begin to coalesce into a dense region called a protostar.

Answer:

Contaminación por quema de combustibles fósiles en vehículos, deforestación y uso de químicos en agricultura.

Explicación:

La contaminación por quema de combustibles fósiles en vehículos, la deforestación y el uso de químicos en la agricultura son los factores que generan problemas ambientales en nuestra comunidad. La quema de combustibles fósiles en vehículos e industrias libera gas de dióxido de carbono que aumenta la temperatura del área, la tala de árboles para uso doméstico tiene un efecto negativo en el medio ambiente. En nuestra comunidad, los productos químicos se utilizan para obtener una mayor producción que también contaminan los cuerpos de agua y los animales acuáticos afectados.

Answer:

D.The amount of sunlight increases in the Northern Hemisphere

Explanation:

did this in study island trust me guys

Answer:

cells are the basic building blocks of all organisms , whether living or dead.

atoms are the basic building blocks of matter(non-living things) . every item , for eg, chair, book, toothbrush are made of atoms?

Answer:

No

Explanation:

No, plants do not take in air with their roots. Roots are designed to absorb water and minerals from the soil. In order to get the air and carbon dioxide they need for photosynthesis, plants have specialized structures called stomata in their leaves and stems that allow air to enter and exit. These stomata regulate the movement of gases into and out of the plant, so the plant can take in the carbon dioxide it needs and release the oxygen it produces.

Answer:

The structure found in plant cells, but not animal cells, that carries out the process of photosynthesis is . ... are structures that contain digestive enzymes. cell wall. in addition to a cell membrane, plant cells also have a that serves to provide strength and support to the cell.

Explanation:

Hydrolysis contributes to

the development of a proton gradient

within the thylakoid membrane.

Thylakoid membrane is a membrane that is found in the membrane bound organelles chloroplast and also present in cyanobacteria which is the light dependent site for photosynthesis.

Therefore, Hydrolysis contributes to

the development of a proton gradient

within the thylakoid membrane.

Learn more about thylakoid membrane below.

https://brainly.com/question/4976370

#SPJ1

Answer: Photolysis

Explanation: I just took the test and hydrolysis is wrong.  

All the three statements are true about the Krebs Cycle, since it begans with the Acetyl CoA derived from the piruvate from glycolysis

Answer:

B. x2 + y2 − 41 = 0

Explanation:

The correct answer is: B. x2 + y2 − 41 = 0

The general form of the equation of a circle centered at (0, 0) is: x^2 + y^2 = r^2, where r is the radius of the circle.

In this case, the circle is centered at (0, 0), and point B (4, 5) lies on the circumference of the circle. Therefore, the distance between the center of the circle and point B is the radius of the circle. This distance can be calculated using the distance formula:

distance = √((x2 - x1)^2 + (y2 - y1)^2)

Plugging in the values for x1, y1, x2, and y2, we get:

distance = √((4 - 0)^2 + (5 - 0)^2)

distance = √(4^2 + 5^2)

distance = √41

Therefore, the radius of the circle is √41, and the equation of the circle is:

x^2 + y^2 = (√41)^2

x^2 + y^2 = 41

Thus, the correct answer is B. x^2 + y^2 − 41 = 0.

The stages of bee development are egg, larva, pupa, and adult. Eggs hatch into larvae, which then transform into pupae. Finally, adult bees emerge and undergo further maturation.

The stages of bee development are:

1. Egg: The bee life cycle begins when the queen bee lays an egg in a honeycomb cell.

2. Larva: The egg hatches into a larva, which is a legless, grub-like creature. The larva is fed a special diet called royal jelly, which stimulates its growth.

3. Pupa: The larva undergoes metamorphosis and transforms into a pupa. Inside the sealed cell, the pupa undergoes various changes, developing into an adult bee.

4. Adult Bee: After completing the pupal stage, the fully developed adult bee emerges from the cell. The bee then undergoes further maturation, such as its exoskeleton hardening, wings expanding, and adult coloration appearing.

It's important to note that there are three castes of bees: queen, worker, and drone. The development process for each caste is similar, but the diet and size of the cells they are raised in differ, leading to their distinct roles within the colony.

For more questions on bee development:

https://brainly.com/question/28696131

#SPJ8

the dependent variable in this experiment  is the weight loss of the mice

The dependent variable is  described the variable being tested and measured in an experiment and is “dependent” on the independent variable.

We have  two variables present in the experiment which are ;

The time of the day varies from morning, noon to evening. This variable is independent of any other aspect and  will always be morning noon and evening  in every single day.

The time of the day shall determine the amount of weight loss and each time shall vary in the amount of weight loss.

In conclusion,  weight loss becomes our dependent variable.

Learn more about dependent variable at:

https://brainly.com/question/25223322

#SPJ1

Complete question:

In an experiment, overweight mice are put on an exercise wheel every day for an hour. The scientist is exploring whether running in the morning, afternoon, or night leads to the greatest weight loss. The caloric intake of the mice remains the same. What is the dependent variable in this experiment? A. The time of day that the mice ran B. The size of the exercise wheel C. The weight loss of the mice D. The caloric intake of the mice

Pollen is a fine powder that seed plants produce. Pollen grains, which create male gametes, make up this substance. Algae plant does not produce pollen. Therefore, option B is correct.

A pollen grain is a small structure that contains an androecium, which is a flower's male reproductive system. Cytoplasm can be found inside the pollen grain together with the tube cell, which transforms into a pollen tube, and the generative cell, which releases the sperm nuclei.

The male gametophyte, or pollen grain, is what houses the male gametes. The two layers that surround the pollen grain are exile, which makes up the outside layer, and intine, which makes up the interior layer. The two male gametes are created by dividing the generative cell. The vegetative cell is in charge of supplying nourishment.

Thus, option B is correct.

To learn more about pollen grain, follow the link;

https://brainly.com/question/13784927

#SPJ1

After you eat, insulin stimulates the lowering of blood sugar levels is an example of negative feedback

Blood sugar levels are raised after eating, and insulin causes them to fall. In this case, the stimulus is countered by the response (raised blood sugar levels) (by lowering blood sugar levels). A negative feedback mechanism, often referred to as negative feedback homeostasis, is a system that is activated by an output deviation and results in output changes that are the exact opposite of the deviation that caused it.

To learn more about negative feedback click here:

https://brainly.com/question/1420367

#SPJ4

Answer:

2023 model s there u go my guy

Answer:

B.During photosynthesis, plants take in carbon dioxide from the air.

Explanation:

A.During photosynthesis, plant roots take in water from soil.  - water is part of the hydrosphere, not the atmosphere.

B.During photosynthesis, plants take in carbon dioxide from the air.  - this is true, the plant - a living thing and part of the biosphere - takes carbon dioxide from the atmosphere to use during photosynthesis.

C.Through photosynthesis, energy stored in plants is released into the air. - this is false, plants release oxygen into the atmosphere as part of photosynthesis , which synthesises glucose. It does not release energy.

D.Through photosynthesis, energy stored in plants is transferred to humans who eat them. - this is true, but does not involve the atmosphere (air in the environment)

T cells undergo a clonal expansion and differentiation followed by a contraction phase, once the pathogen has been cleared.

Recent in vitro and in vivo evidence supports an antigen-pre-senting role for T cells. Human T cells exhibit major histocompatibility complex (MHC) class II antigens and adhesion molecules that are typical of antigen-presenting cells (APCs).

Controlling the populations of effector, memory, and naive T lymphocytes depends on cell survival and death. The presence of MHC proteins in the antigen-presenting cell is necessary for the identification process because they bind to these fragments, transport them to the cell surface, and present them to the T cells there together with a co-stimulatory signal.

Due to their dual specificity, T cells can distinguish between peptide antigens presented by self-MHC I or MHC II molecules and those presented by other MHC molecules.

To learn more about T cell refer to  :

https://brainly.com/question/9875046

#SPJ1

Motion energy refers to the energy related to an object's movement. When an object is in motion, it possesses kinetic energy, which is a form of motion energy.

The matching will be:

motion energy = energy related to an object's movement

chemical energy = stored energy related to positions of atoms within molecules

thermal energy = energy of motion of particles in a substance

nuclear energy = energy released when a nucleus splits or combines

gravitational potential energy = energy related to height

sound energy = energy generated by vibration of a string

Chemical energy is stored energy that is related to the positions of atoms within molecules. It is the energy that can be released or absorbed during a chemical reaction. When chemical bonds are formed or broken, energy is either released (exothermic reaction) or absorbed (endothermic reaction) in the process.

Learn more about energy on

https://brainly.com/question/13881533

#SPJ1

They became extinct, so they did not exist when the younger rock layers formed. Option D.

The most likely scenario based on the information provided is that the organisms that became fossilized in older rock layers became extinct, and therefore, they did not exist when the younger rock layers formed.

Fossils are the preserved remains or traces of organisms from the past, and they provide valuable insights into the history of life on Earth. The distribution of fossils in rock layers follows the principle of superposition, which states that younger rock layers are deposited on top of older ones.

This implies that the fossils found in older rock layers represent organisms that lived in the past and were preserved through the fossilization process.

If the older rock layers contain fossils of many kinds of organisms that are not found in younger rock layers, it suggests that those organisms no longer existed by the time the younger rock layers formed. The absence of their fossils in younger layers indicates that either the organisms became extinct or their populations shifted to different habitats or regions where their remains were not preserved as fossils.

This phenomenon aligns with the concept of extinction, which is the complete disappearance of a species or a group of organisms. Extinction can occur due to various factors such as environmental changes, competition, predation, or other selective pressures.

Organisms that became extinct would not be present in subsequent rock layers because they were no longer alive or did not have a viable population to leave behind fossil remains.

Therefore, the most reasonable explanation is that the organisms that became fossilized in older rock layers became extinct, and this is why they are not found in younger rock layers. SO Option D is correct.

For more question on extinct visit:

https://brainly.com/question/30957278

#SPJ8