Plz help with this problem.

Answer:

Kingdom Protista was first described by Antony van Leeuwenhoek in 1675. The kingdom includes the majority of unicellular and eukaryotic organisms.

Explanation:

Protists are eukaryotic organisms such that they consist of a well-defined nucleus, membrane-bound cell organelles, and are mostly unicellular. However, some of the protists such as algae perform photosynthesis, some protists exhibit mutualism, and some are parasitic.  

Most of the protists are single cells, but they can exist in multicellular forms, in colonies, and can live as single-cell. Some of the examples include giant kelps, euglena, and diatoms.  

Protists such as alga are capable of performing photosynthesis. Photosynthesis is the process of preparing food in the presence of sunlight, water, and carbon dioxide to yield oxygen and provide energy.  

Protists are one of the diverse kingdoms in the classification of organisms as it comprises moulds, algae, and protozoa. Protists are not classified as plants, fungi, or animals. For example, the division Bryophyte is considered as a primitive division to plants, whereas kingdom Moneran is considered as most primitive.  

Answer:

the sun

Explanation:

the sun is energy that controls all weather activity. (pretty much)

Answer:

1.The period during which a heart chamber is contracting is called systole.

2. The period during which a heart chamber is relaxing is called diastole.

3. During ventricular contraction, the AV valves (tricuspid and mitral valves) are closed.

4. During ventricular relaxation, the AV valves are open.

5. The pulmonary and aortic valves open when the pressure in the ventricles exceeds the pressure in the pulmonary trunk and aorta.

6. The first sound of a cardiac cycle occurs when the atrioventricular valves are closing.

7. The second sound of a cardiac cycle occurs when the semilunar valves are closing.

Explanation:

We can divide the heart cycle into two parts the systole and the diastole. The systole happens when the heart walls contract, and the diastole when these relax.

The relaxation and contraction allow the flow of blood into the different heart chambers.

During diastole, blood flows to the right atrium from the vena cavae superior and inferior, and the coronary veins and to the left atrium from the pulmonary veins. The blood accumulated in the atriums causes the AV valves to open, and blood flows to the ventricles. In this part, the atrium pressure exceeds the ventricular pressure allowing the blood's flow. When the atriums contract, the remaining blood that was in them, goes to the ventricles. Throughout all this process, the pulmonary and aortic valve is closed due to a pressure difference.

During ventricular systole, there are two phases. First, the ventricles contracts themselves, and the ventricular pressure increases, being higher than the atrium pressure. As a consequence, the AV valves close. During this first phase of contraction, there is not enough pressure to open the pulmonary and aortic valves. In the second phase, the ventricles completely contract themselves, the ventricular blood pressure increases. It becomes higher than the pressure in the aortic and pulmonary valves. As a consequence, the blood pushes the valves open, and blood goes out of the heart. Then, the difference in pressure between the ventricles and the pulmonary trunk and aorta causes the valves in these areas to close.

The first sound that we listen to is the S1 and is during the ventricular contraction that closes the atrioventricular valves. The second sound is the S2, and it happens when the semilunar valves close, also knowns as aortic and pulmonary valves. S2 occurs during diastole once that the blood is out of the ventricle and the contraction has finished.

Answer: low reproduction rates, hunting and most importantly habitat destruction

Explanation:

Transpiration: process in which plants release water vapor into the air.

Evaporation:   process in which water changes to a vapor.

Precipitation:   water that falls from clouds toward the ground.

Condensation: water vapor that cools down to form water droplets.

Runoff:  flowing of rainwater downhill to form streams and rivers.

To know more about water cycle here

https://brainly.com/question/1151425

#SPJ2

The statement that Best describes the students' results is option A. Mushrooms grow better at the cooler temperature.

Since the students' are experiment and results are described in the table.

So based on this, we can say that the mushroom should grow better at the cooler temperature.

Also, the number of mushroom should be 34.

Therefore, the option a is correct.

Learn more about experiment here: https://brainly.com/question/2700122

Answer:

Sample 1

Explanation:

Dna contains carbon, hydrogen, oxygen, nitrogen, and phosphorus. These make up the sugar-phosphate backbone of the DNA also known as the sides of the ladder.

Answer: B. Blood Type

Explanation: Got it right on edge

Answer:

D. Warm front

Explanation:

Warm fronts typically have warmer and more moist air than the air in front of it. Replacing the cold air with warm air can cause precipitation.

Answer:

profits farmers

Explanation:

Answer:

Crop yield

Explanation:

Answer:

A human body contains 46 chromosomes in pairs of 2

Explanation:

A human body contains 46 chromosomes in pairs of 2

Explanation:

Answer:

Independent variable: temperature

dependent variable: clams

optimum temp is 30 degrees

I'm not exactly sure about the mean

for number five since it went up 20 then I would say 52

the last one is a hypothesis

Explanation:

Answer:

bacterias extremófilas

Explanation:

Los organismos extremófilos son aquellos capaces de vivir en condiciones extremas. Los extremófilos pueden ser tanto procariotas (arqueas y bacteria) como eucariotas (hongos, plantas, animales, etc). Algunos ejemplos interesantes de bacteria extremófilas capaces de sobrevivir en condiciones extremas como las que se encuentran en el espacio incluyen:

1- Deinococcus radiodurans, la cual es una bacteria capaz de resistir grandes dosis de radiación.  

2- Thermus aquaticus, una bacteria capaz de vivir a temperaturas entre 50 y 80 °C. Esta bacteria produce una ADN polimerasa termoestable que ha sido utilizada para la reacción en Cadena de la Polimerasa (PCR)

3- Polaromonas vacuolata, una bacteria capaz de desarrollarse completamente sin problemas a temperaturas muy bajas. (entre 4 °C a 0 °C).

Answer:

what is with yall wemen and sperm

Explanation:

im a male

Answer:

All of the above

Explanation:

Answer:

If I were to guess its probably Vascular

Explanation:

Cactuses can store water nearly four months mainly in the winter and watering is not required for them frequently during that time. The stem acts as a reservoir for the amount of water it holds. The ground tissue of cactus has lots of parenchymal cells that store water.

The ground tissue system comes from a ground meristem which has three tissues, namely parenchyma, collenchyma, and sclerenchyma.

The ground tissue of cactus has many parenchyma cells that store water.

Thus, it can be concluded that the ground tissues helps cactus to store water for a long time.

For more details regarding ground tissue, visit:

https://brainly.com/question/346979

#SPJ2

Answer:

mutations can affect an organism by changing its physical characteristics (or phenotype) or it can impact the way dna codes the genetic information (genotype). when mutations occur they can cause termination (death) of an organism or they can be partially lethal.

good luck :)

hopefully, this helps

have a great day !!

Answer:

Well depending on context it can mean different things, I could mean one of these three thing, choose the one you think is the most suitable,

(1) The birth, existence, or beginning; starting point. (2) The cause; that which causes something to arise. (3) That which acts as the source or that which from where something is derived.

Answer:

The correct answer is A...........

Answer:

false

Explanation:

because the cells are unique and different

Answer:

Even though there are many different types of cells, they all share similar characteristics. All cells have a cell membrane, organelles organelles, cytoplasm, and DNA. ( is false)

Answer:

The correct answer is option A. muscle cell, muscle tissue, biceps, muscle system, and human being.

Explanation:

In humans and other mammals, there is a specific type of structural organization found in which involves fundamental units to the most exclusive level of organization. The cell is the most basic and fundamental unit of the organism's structure.

Cells joined together to form tissues like muscle cells form muscle tissues, tissues grouped with each other into organs like muscle tissue form biceps, different organs are grouped into organ systems like muscle system form from organs, and many organ systems come together to form complex organisms like human beings.

Answer:

It is the excretion of ammonia and ammonium ions

Answer:

no

Explanation: