Can someone plz help me on this science its due today and STAAR test is next week

Answer:

A

Explanation:

I think an untreated water can carry disease causing organisms and make people sick

Answer:

crabs and fish.................

Answer:

crab and grasshopper???....

Explanation:

Cell death​ is not part of the function of the normal cell cycle, a strictly controlled cell mechanism known as programmed cell death, or apoptosis, hence option d is correct.

Eliminates cells that are no longer required or pose a hazard to the organism in multicellular creatures.

The body's mechanism of cell death is crucial. When cells are not required, as at some developmental phases, for example, they are removed.

For instance, the outer layer of the skin is formed of dead cells, which form a structure in the body that is also apoptosis.

Therefore, cell growth, DNA replication, cell division are part of the cell cycle, a controlled cell death mechanism known as programmed cell death, or apoptosis, hence option D is correct

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Answer:

DNA helicase

Explanation:

The image of this question shows the replication of DNA into two identical copies. However, before this occurs, the double-stranded DNA needs to be unwound or separated so that each single strand can serve as a template for a new strand.

An enzyme called DNA helicase is responsible for the separation of the DNA molecule into single strands. After which, DNA polymerase begins to add nucleotides to each single strand of DNA.

Answer:

A. Birth and immigration rate is greater than death and emigration rate.

Explanation: trust

Birth and immigration rate is greater than death and emigration rate. Therefore, option (C) is correct.

Exponential growth is a type of population growth pattern in which a population size increases at an accelerating rate, with each generation or time period adding a larger number of individuals than the one before it. This type of growth results in a population having a higher total number of members than it did in the previous generation.

To put it another way, the rate of population growth picks up steam over the course of time, producing a J-shaped curve when the data is plotted on a graph. This pattern can emerge when there is an abundance of resources available to a population but only a moderate amount of competition for those resources. This results in rapid reproduction and population growth as a result.

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Answer:

mutualism -Both species benefit

commensalism- One species lives with, on, or in another species (the host). The host species neither benefits nor is harmed from the relationship. The species that lives on the host is benefited.

parasitism - One species (the parasite) lives with, on, or in a host species, at the expense of the host species. Unlike in predation, the host is not immediately killed by the parasite, though it may sicken and die over time.

predator/prey -One species (the predator) hunts and kills another species (the prey)

competition -The struggle among organisms for the same limited resources in an ecosystem

Explanation:

Answer:

The answer option that you are searching for today is the option "B."

From the reference point of a person standing on the ground in front of the roller coaster, Melinda and Bart are moving away from the observer. Therefore, option (D) is correct.

A reference point is a fixed location or object used to determine the position, speed, and direction of motion of an object or person in motion. It is used in physics and other sciences to describe the motion of objects.

This is because the roller coaster is moving forward along the track, and the third car, where Melinda and Bart are sitting, is behind the first and second cars. As the roller coaster moves forward, the distance between the third car and the person standing on the ground in front of the roller coaster increases, indicating that Melinda and Bart are moving away from that observer. Therefore, the correct  option is D, "a person standing on the ground in front of the roller coaster."

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Answer: short, straight teeth

Explanation: study island

Biome that receives a lot of rain, moderate temperatures, and a long growing season is grassland. Thus, option D is correct.

Ecosytem is defined as a community that is biological by nature and the organism in that community attract with each other as well as their physical environment. Ecosystem is consist of both biotic as well as abiotic factor. The living components of ecosystem comes in category of biotic factor and non living components of ecosystem comes in category of abiotic factor.

Biodiversity is all the different kinds of life living in a particular area like the varity of animals, plants, fungi and microorganisms like bacteria and virus that plays a major role in framing of natural world usually three levels of biodiversity are observed and these are genetic species, and ecosystem diversity.

Biodiversity is very important for the process that's support all life present on earth including human.

Therefore,Biome that receives a lot of rain, moderate temperatures, and a long growing season is grassland. Thus, option D is correct.

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Answer: a naturally occurring depsipeptide used in the transport of potassium

By contracting, muscles pull on bones and allow the body to move. ... Each muscle in the pair works against the other to move bones at the joints of the body. The muscle that contracts to cause a joint to bend is called the flexor. The muscle that contracts to cause the joint to straighten is called the extensor

Answer:

Places with latitudes closer to the Equator have hotter climates. Places with latitudes closer to the Poles have colder climates. This happens because the Sun's rays hit them more or less directly.

The Sun powers life on Earth; it helps keep the planet warm enough for us to survive.

The latitude of a region influences its climate, and the sun plays an important role in the area's climate because the more the area receives close sun rays, the warmer it is, and the less the area receives close sun rays, the cooler it is.

Latitude has a significant impact on temperature determination because the closer an area is to the equator, the more sunlight it receives, and thus the warmer it is; whereas in Arctic regions, the area is farther from the equator and thus receives less sunlight.

Hence, the latitude of a region influences its climate, and the sun plays an important role in the area's climate because the more the area receives close sun rays, the warmer it is, and the less the area receives close sun rays, the cooler it is.

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Answer:

hope it helps!!

...............

Answer:

Chemical, because the chemical reaction of the oil being lit on fire cannot be reversed

Explanation:

Answer:

Haciendo almacenamiento y excavación en un área grande, mientras que los estanques son los sistemas utilizados para recolectar agua.

Explicación:

El sistema artificial que el hombre usa para recolectar agua es la construcción de un gran almacenamiento de concreto y la excavación de un gran terreno que recolecta agua de lluvia y puede ser utilizado por la gente para su uso diario, mientras que por otro lado, los estanques son el sistema natural donde el agua del la lluvia se acumula naturalmente. Esta agua es utilizada por la población que vive alrededor de ese estanque. Ambos sistemas proporcionan agua para el uso diario, como lavar, beber y cocinar, etc.

Answer:B. burning of fossil fuels

Explanation:

Answer: G. Horses slowly developed over time

Explanation:

Answer:

Abiotic factors refer to non-living physical and chemical elements in the ecosystem. Abiotic resources are usually obtained from the lithosphere, atmosphere, and hydrosphere. Examples of abiotic factors are water, air, soil, sunlight, and minerals. Biotic factors are living or once-living organisms in the ecosystem.

Explanation:

Some examples of important nonliving things in an ecosystem are sunlight, temperature, water, air, wind, rocks, and soil. Living things grow, change, produce waste, reproduce, and die. Some examples of living things are organisms such as plants, animals, fungi, and bacteria.

Answer: Question 24 (6 points) ✓ Saved Within a forest and stream ecosystem, there is a food web that includes grasses, rabbits, grasshoppers, foxes, and snakes. Answer the following questions for 2 points each: 1. Identify TWO density-dependent limiting factors that could affect the rabbit population. 2. Explain ...

Explanation:

a food web that includes grasses, rabbits, grasshoppers, foxes, and snakes. Answer the following questions for 2 points each: 1. Identify TWO density-dependent limiting factors that could affect the rabbit population. 2. Explain ...

Answer:

a change or the process of change by which an organism or species becomes better suited to its environment

Explanation:

Answer:

ad·ap·ta·tion

/ˌadapˈtāSH(ə)n/

Learn to pronounce

noun

the action or process of adapting or being adapted.

"the adaptation of teaching strategy to meet students' needs

"filming her adaptation of a beloved children's book

Explanation:

Just search it up

Answer:

As an embryo develops, identical cells give rise to specialized cells that perform different functions.

Explanation:

As an embryo develops, the cells divide, giving new ones. As the cells grow and continue to reproduce themselves, they differentiate, becoming specialized cells. These cells will be located in a particular part of the embryo and will perform a specific function. The shape, size, and organelles vary according to their role.

Answer:

sponges

Explanation:

because sponges need photosynthesis in order manufacture their food

The organisms namely sponges and coral animals are most likely to starve to death in the lack of photosynthetic endosymbionts. The correct option is 1 and 2.

Endosymbionts are organisms that live in close proximity to another cell or organism.

As sponges are predominantly filter feeders, consuming detritus, plankton, viruses, and bacteria. They also absorb nutrient solution from water directly through their pinacocyte cells.

Due to the lack of photosynthetic endosymbionts the organisms namely sponges and coral animals are most likely to starve.

Thus, the correct option is 1 and 2.

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Answer:

Peppers can be eaten at any point of ripeness, but the color change in ripening peppers is caused by the degradation of chlorophyll, which occurs at the same time as the seeds mature.

Explanation:

What are the organs of the immune system?

Publication Details

Our immune system is made up of both individual cells and proteins as well as entire organs and organ systems. The organs of the immune system include skin and mucous membranes, and the organs of the lymphatic system too.

Organs that function as barriers

Your skin and mucous membranes are the first line of defense against germs entering from outside the body. They act as a physical barrier with support from the following:

Antibacterial substances can kill germs right from the start. A certain enzyme found in saliva, the airways and tear fluid destroys the cell walls of bacteria.

Mucus in the bronchi helps trap many of the germs we breathe in so they can be moved out of the airways by hair-like structures called cilia.

Stomach acid stops most of the germs that enter the body in the food we eat.

Harmless bacteria on our skin and many of the mucous membranes in our body also act as part of the immune system.

In addition, the reflexes that cause us to cough and sneeze help to free our airways of germs.

Illustration: The parts of the immune system

The parts of the immune system

Lymphoid organs

The lymphatic system is composed of:

Primary lymphoid organs: These organs include the bone marrow and the thymus. They create special immune system cells called lymphocytes.

Secondary lymphoid organs: These organs include the lymph nodes, the spleen, the tonsils and certain tissue in various mucous membrane layers in the body (for instance in the bowel). It is in these organs where the cells of the immune system do their actual job of fighting off germs and foreign substances.

Bone marrow

Bone marrow is a sponge-like tissue found inside the bones. That is where most immune system cells are produced and then also multiply. These cells move to other organs and tissues through the blood. At birth, many bones contain red bone marrow, which actively creates immune system cells. Over the course of our life, more and more red bone marrow turns into fatty tissue. In adulthood, only a few of our bones still contain red bone marrow, including the ribs, breastbone and the pelvis.

Thymus

The thymus is located behind the breastbone above the heart. This gland-like organ reaches full maturity only in children, and is then slowly transformed to fatty tissue. Special types of immune system cells called thymus cell lymphocytes (T cells) mature in the thymus. Among other tasks, these cells coordinate the processes of the innate and adaptive immune systems. T cells move through the body and constantly monitor the surfaces of all cells for changes.

Lymph nodes

Lymph nodes are small bean-shaped tissues found along the lymphatic vessels. The lymph nodes act as filters. Various immune system cells trap germs in the lymph nodes and activate the creation of special antibodies in the blood. Swollen or painful lymph nodes are a sign that the immune system is active, for example to fight an infection.

Spleen

The spleen is located in the left upper abdomen, beneath the diaphragm, and is responsible for different kinds of jobs:

It stores various immune system cells. When needed, they move through the blood to other organs. Scavenger cells (phagocytes) in the spleen act as a filter for germs that get into the bloodstream.

It breaks down red blood cells (erythrocytes).

It stores and breaks down platelets (thrombocytes), which are responsible for the clotting of blood, among other things.

There is always a lot of blood flowing through the spleen tissue. At the same time this tissue is very soft. In the event of severe injury, for example in an accident, the spleen may rupture easily. Surgery is then usually necessary because otherwise there is a danger of bleeding to death. If the spleen needs to be removed completely, other immune system organs can carry out its roles.

Answer:

Breathing: is the physical process of exchanging gases

respiration: is a chemical process that takes place at a cellular level and produces energy.

Answer:

Variation occurs in species with the genes resulting in the traits and physical characteristics that make it possible for them to be among the fittest for a number of reasons:

1. Mutation

2. Recombination and

3. Migration

Explanation:

Mutations:  A mutation is a deviation from the norm in a DNA sequence. It can be stimulated by errors during the DNA replication process which happens as the cell is dividing, or by exposure to ionizing radiation, chemicals, or viral infection (whether artificial or natural).

It is noteworthy that naturally, without any human intervention, the possibility of a spontaneous mutation is very low.

Recombination: This refers to the creation of new fusion of genes in the offspring that did not occur in the parents by the processes of crossing-over and independent assortment. Independent assortment meaning that the allele the gamete received for one gene was not influenced by the allele received for another gene.

Migration: Variation by migration here refers to the introduction of new genes from into one population by another. This could happen when a new population arrives at an existing one or when an existing one migrates to another population.

We can say for example that, genes from Americans have “migrated” into the population of African origin in America given the continuous immigration of Africans into America.

So in both populations, there are very fit species, but when their genes are mixed during cross-reproduction, variation arises.

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