Can someone plz help me on this plz

Answer:

Why do cells die? ... When cells are not needed, such as during certain stages of development. To create a structure in the body, for example, the outer layer of the skin is made of dead cells. To remove excess cells, such as white blood cells after an infection has been cleared.

Cells need to die bcuz a cell has only a limited amount of energy to do its function so it will not work aftr it has no energy. thus cells need to die.

Answer:

The correct answer is B.

Explanation:

I choose answer b on this map

Answer:

Explanation:

A square mile of tropical rainforest contains 36 mammal species. A square mile of tundra contains 4 mammal species.

What characteristic of ecosystems is being described above?

producers

abiotic factors

succession

biodiversity

2. Which of the following is most likely to decrease biodiversity?

Protecting more land from future housing developments

Reintroducing natural predators to an area

Clearing a forest to raise livestock for a nearby town

Adding native plants to a suburban garden

3. In the Kelp forest ecosystem, sea urchins eat kelp, and sea otters eat sea urchins.

What is the role of sea urchins in this ecosystem?

primary consumers

secondary consumers

primary producers

producers

4. What is the correct order of energy flow in an ecosystem?

sun → grass → rabbit

sun → rabbit → grass

fox → rabbit → grass

sun → fox → rabbit

are areas where rivers flow into lakes. A coastal body of brackish water that is partially contained, has one or more rivers or streams flowing into it, and has a free connection to the open sea is called an estuary.

Estuaries are areas of water where rivers and the ocean converge. They serve as habitat for a variety of fauna, including well-known fish species. They also help employment, tourism, shipping, and other things. Due to the fact that estuaries often have brackish waters, which are a mixture of fresh water that drains from the land and salty ocean, many different kinds of plant and animal species call them home. Numerous habitats are produced by this unusual admixture of fresh and salt water.

Learn more about estuary here:

https://brainly.com/question/14681370

#SPJ4

Answer:

A. is the answer

Explanation:

Oil, coal and natural gas resources are non renewable energy sources.

The proteases are activated by the pH that changes in the stomach and small intestine.

Proteases are the proteins that have the ability to cleave the peptide bonds present in the proteins. The proteases are very important part of the digestive system as they are major forces that make protein digestible and amenable to assimilation. The protease are secreted with the digestive enzymes the are produced in the stomach and small intestine predominantly. The proteases are produced in the inactive form so that they cannot digest the cell that are producing them. In order to become active they need special condition such as pH for their activation.

So, pH is the major activating condition for the proteases, in addition to it there are special protein that act on inactivated protease to make them active.

To know more about proteases, click here,

brainly.com/question/3939838

#SPJ4

Mollusks are classified into  various classes like Gastropod, Bivalvia, Cephalopoda, and Polyplacophora .

Gastropods have a special characteristics that includes spirally-coiled external shell while others mollusks usually have a flattened shell, and many of them doesn't  possess any shell as outer structure.

Four common characteristics that all mollusks share , are having soft bodies, a mantle, a visceral mass, and the foot. The phylum Mollusca has many distinctive features and  special characteristics, which include a mantle cavity, visceral mass, foot, and radula.  Mantle is the cavity which is used for breathing and excretion purpose , radula is longue like structure that helps in sensory and food grasping purpose.

To learn more about Mollusks , here

brainly.com/question/28737614

#SPJ4

Answer:

a. 25 N ---> Direction: Right

b. 40 N ---> Direction: Right

c. 10 N --->  Direction: Right

d. 90 N <--- Direction: Left

e. 40 N down Direction: Down

Hope this helps!

Water molecules must have moved out of the lettuce by osmosis. The addition of salt and other seasonings must have created a hypertonic ambiance for the cells of the lettuce.

Osmosis refers to the movement of solvent (mostly water) molecules through a selectively (semi) permeable membrane from a region of lower solute concentration to a region of higher solute concentration, in such a way as to equate the solute concentrations on both sides. Water usually moves osmotically from regions of lower solute concentration (high water potential) to regions of high solute concentration (low water potential).

Thus, water will move out of the cells of the lettuce to the surrounding (bottom of the bowl) due to the lower water potential of the surrounding.

To learn more about osmosis check the link below:

https://brainly.com/question/11534932

#SPJ4

The factors like genetic mutations, random mating, gene flow and genetic drift can increase genetic variance.

Genetic variations are the changes which occur in the genetic sequence of the DNA. These genetic variations are necessary as they allow the living beings to evolve and eventually survive. There are some factors which cause an increase in the genetic variation and they are genetic mutations, random mating, gene flow and genetic drift.

A genetic mutation is an alteration in the DNA sequence of a particular gene which causes a different product to form. This helps increase the genetic variance in organisms. Gene flow is defined as the movement of genes in and out of a particular population. In-flow of genes can help increase the genetic variation of individuals in that population. Genetic drift is the change in allelic frequency in a population by chance. Random mating is the mating of individuals that is not especially dictated by any social or genetic preference and leads to an increase in variation.

To learn more about gene flow here

https://brainly.com/question/29992261

#SPJ4

Answer:

They mostly break down carbohydrates and fats. Once a protein source reaches your stomach, hydrochloric acid and enzymes called proteases break it down into smaller chains of amino acids

Explanation:

Answer:

Mitochondrial DNA is the small circular chromosome found inside mitochondria. The mitochondria are organelles found in cells that are the sites of energy production. The mitochondria, and thus mitochondrial DNA, are passed from mother to offspring.

Answer:

Try 2 sister chromatids.

Explanation:

Answer:

The binomial nomenclature system combines two names into one to give all species unique scientific names.

Explanation:

Hope this helps, not 100% sure if this is what you are looking for :)

This is a system of providing a name with two components 1st = Generic name

2nd = specific epithet or species

this naming system was given by carolus Linnaeus

hope it helps

All tall will be the expected outcome for the F1 generation. To create the P generation, Mendel crossed two pure breeding parents. A tall plant and a short plant have been crossed. In the first generation following the cross, one version of a trait.

Such as tall, always concealed the other form, such as short. Mendel referred to the dominant trait as being visible, and the recessive trait as being concealed. The buried version of the trait resurfaced in a small percentage of the plants in the second generation when plants were permitted parents to self-fertilize (pollinate themselves). The ratio was specifically 3:13:13, colon, 1, meaning that there were always roughly 333 plants that displayed the dominant characteristic (for example, tall) for every 111 plants that displayed the recessive trait.

To learn more about generation, click here.

https://brainly.com/question/10736907

#SPJ4

Plantlike photosynthesis that releases oxygen (O2) occurs in Cyanobacteria.

Cyanobacteria is a type of a gram-negative bacteria that lives in any body of water which also synthesize its energy by the means of photosynthesis; using the power of sunlight to synthesize its food from carbon dioxide and water, and converting the light energy into a chemical energy with a byproduct of oxygen. The large existence of cyanobacteria may contaminate the water, polluting the water with the toxins it produces called cyanotoxins, and are harmful to people and animals.

To learn more about cyanobacteria visit: https://brainly.com/question/24805824

#SPJ4

The following is the correct order of the structures through which light passes after entering the eye : Cornea, pupil, lens, vitreous humour retina

Light travels like this:

1) Enters the cornea, which bends light. 2) Light passes freely through the pupil of the iris. 3) Light passes through the vitreous. 4) The retina captures light rays and processes them into impulses.

Some of this light enters the eye through an opening called the pupil. The iris (the colored part of the eye) controls the amount of light accepted by the pupil. The light then passes through the lens (the transparent part of the eye). The lens works with the cornea to correctly focus light onto the retina.

The eight structures in the eye that light passes through before hitting the photoreceptors are the cornea, aqueous humor, lens, vitreous humor, ganglion cell layer, inner reticular layer, inner nuclear layer, and outer reticular layer. .

For more information on  eye , visit :

https://brainly.com/question/15295757

#SPJ4

Answer:  Phtosynthesis

Explanation:

Photosynthesis

Photosynthesis removes carbon dioxide naturally — and trees are especially good at storing carbon removed from the atmosphere by photosynthesis

We can keep raising K thanks to technology. The best assessment of how many people the earth can support is the following.

Earth's location in the universe is determined by the Hercules Supercluster of galaxies. A supercluster is a group of galaxies bound together by gravity. Within this supercluster, a smaller group of galaxies called the Local Group includes us. Earth is situated in the Night Sky, the second-largest galactic in the Bike Club.

Contrary to common opinion, Earth lacks a globally recognized name. A common misinterpretation of the planet's scientifically known is "Terra." "Earth" is the planet's common surname as it is referred to in science.

To know more about earth visit

https://brainly.com/question/26660965

#SPJ4

The first law of thermodynamics in living things. The sun provides the energy for photosynthesis. Plant leaves have cells that take in light energy and transform it into chemical energy.

The second law states that when everything goes from order to disorder, entropy increases. Living organisms die when there is a systemic imbalance.

Glucose, which is needed to create the complex carbohydrates required to increase plant bulk, serves as a reservoir for the chemical energy.

The second law of thermodynamics has two statements: Clausius's claim A system that operates in a cycle and transfers heat from a low-temperature reservoir (or object) to a high-temperature reservoir (or object) without causing any outside influences or interacting with the environment is not conceivable to build.

To know more about thermodynamics

https://brainly.com/question/29359194

#SPJ4

When fungal buds remain attached in a row following cell division, the resulting chains of yeast cells are called Pseudohyphae.

Yeast cells form chains called Pseudohyphae when fungal buds remain attached in a row after cell division. This type of chain formation allows for the growth and expansion of fungi in an environment, helping them to survive and thrive.

Pseudohyphae can be found in a variety of different fungi, including Candida albicans and Cryptococcus neoformans.

Understanding the formation of Pseudohyphae is important in order to monitor and control the growth and spread of fungi.

Pseudohyphae can be an indication of a fungal infection, and are typically associated with Candida yeast species. The formation of Pseudohyphae can be used to help diagnose a fungal infection and provide further information about the type of fungus involved.

To learn more about yeast, click here:

https://brainly.com/question/25088514

#SPJ4

Explanation:

The formula for the volume of a cylinder is V=Bh or V=πr2h . The radius of the cylinder is 8 cm and the height is 15 cm. Substitute 8 for r and 15 for h in the formula V=πr2h .

Answer:

an optical instrument used for viewing very small objects, such as mineral samples or animal or plant cells, typically magnified several hundred times.A microscope is a laboratory instrument used to examine objects that are too small to be seen by the naked eye. Microscopy is the science of investigating small objects and structures using a microscope. Microscopic means being invisible to the eye unless aided by a microscope.

Answer:

This question lacks options, the options are:

A. The DNA sample comes from a bacterium or virus,

B. The DNA sample has been cut into fragments by restriction enzymes.

C. Only a small amount of the DNA sample is available,

D. The DNA sample includes regions that are transcribed into mRNA

The answer is C

Explanation:

Polymerase chain reaction, commonly known as PCR, is a molecular technique used to amplify a DNA sample into producing million copies of it. The PCR was invented by Kary Mullis in 1983 and since then it has been used to multiply DNA sample for use in molecular or forensic studies.

PCR starts with a very minute fragment of DNA sample. Therefore, scientists use the polymerase chain reaction (PCR) before they analyze a DNA sample under the condition that only a small amount of the DNA sample is available.

The selection of plants and livestock by agriculturalists is a critical component of successful farming.

It is important to choose the right plants and animals in order to maximize yields, reduce risk, and ensure sustainability. There are several criteria that agriculturalists use to make their selections.

The first selection criteria is climatic adaptability. This means ensuring that the plants and animals being chosen are suitable for the climate, soil, and other environmental conditions of the farm. It is important to choose varieties that are disease resistant, drought tolerant, and adapted to local conditions. Additionally, plants should be chosen based on their yield potential, harvest season, and marketability.

The second selection criteria is genetic variability. This means selecting plants and animals with a wide range of genetic diversity. This diversity is important for ensuring that the crops and livestock are able to adapt to changing environmental conditions. Additionally, genetic diversity helps to reduce the risk of disease and pest outbreaks.

Learn more about genetic variability at :https://brainly.com/question/13920863

#SPJ4

Answer:

Explanation:

Ribosomes are found 'free' in the cell cytoplasm and also attached to rough endoplasmic reticulum. Ribosomes receive information from the cell nucleus and construction materials from the cytoplasm.

Answer:

the part that I circled in blue is where ribosomes are in a cell