Explain the processes of ACTIVE and PASSIVE TRANSPORT- include their similarities and differences?

QUESTION POSTED AT 23/09/2019 - 04:14 AM

Related questions

What as Redi's constant,conditions that are kept the same in an experiment so that differences in results can be interpreted correctly, in his scientific experiment?

The meat stored in an uncovered jar which allowed access for the flies.

ANSWERED AT 16/10/2019 - 11:36 PM

QUESTION POSTED AT 16/10/2019 - 11:36 PM

You and your friends have found two different creeks to swim in. The first is crystal clear and cold. The second is slightly cloudy, but much warmer. What makes the two creeks different?


the second creek has more suspended load

for plato users


ANSWERED AT 16/10/2019 - 11:34 PM

QUESTION POSTED AT 16/10/2019 - 11:34 PM

Describe a process in the human body in which there is evidence of the cell cycle at work.

The best possible answer would be breathing. 

ANSWERED AT 16/10/2019 - 11:34 PM

QUESTION POSTED AT 16/10/2019 - 11:34 PM

Give an example of a specialized leaf system that is adapted specifically to its environment and explain how it works.

Th waxy coating over the surface of the leaves in xerophytic plants like cactus helps in preventing water loss by transpiration, and thus, helps them in maintaining turgor pressure and ultimately, in survival.
The cold-climate plants like pine, have needle-shaped small leaves, which help them in water conservation.

ANSWERED AT 16/10/2019 - 11:13 PM

QUESTION POSTED AT 16/10/2019 - 11:13 PM

Explain what type of logging would most likely necessitate reforestation afterwards.

Clear-cutting logging would be more likely to necessitate reforestation afterwards than selective cutting. Clear-cutting removes all trees in an area and results in more significant environmental damage, making it more difficult for the trees to regrow naturally. With selective cutting only some of the trees are harvested, so the overall ecosystem is preserved which makes it more likely that trees will be able to regrow naturally.

ANSWERED AT 16/10/2019 - 11:01 PM

QUESTION POSTED AT 16/10/2019 - 11:01 PM

How does Earth’s temperature compare to other planets in the solar system? is more stable and has a lower range of variability is colder overall is warmer overall is overall very similar to other planets

The Earth is the only planet in our solar system and the entire universe that is known to support life within its atmosphere. Our atmosphere is made up of nitrogen, oxygen, carbon dioxide and argon. Other planets atmospheres are made up of different elements and compounds, Neptune, for example has an atmosphere of hydrogen, helium and traces of hydrocarbons; nitrogen is also thought to be on Neptune as well.Earth is the third planet from the sun at 150 000 000km away, in front of earth are Venus at 108 000 000km away and then Mercury 57 900 000km away. Earth has only one moon; whereas other planets have multiple moons except Mercury and Venus which have no moons.

ANSWERED AT 16/10/2019 - 10:57 PM

QUESTION POSTED AT 16/10/2019 - 10:57 PM

Explain the difference between a tornado watch and a tornado warning.

A watch means that the potential exists for the development of tornadoes, depending upon the specific type of watch issued. A warning means that a tornado has been spotted or radar has indicated intense low-level rotation in the presence of atmospheric conditions conducive to tornado development.

ANSWERED AT 16/10/2019 - 10:46 PM

QUESTION POSTED AT 16/10/2019 - 10:46 PM

El Nino is a weather event in which the waters of the Pacific Ocean around the equator are warmer than normal. This seems to bring an increase in the number of hurricanes in the eastern Pacific. Explain the most likely cause for this.

Warm air over the ocean causes hurricanes. Warmer waters would increase the air temperatures over the water.

looks short but its the answer on quizlet too.

ANSWERED AT 16/10/2019 - 10:45 PM

QUESTION POSTED AT 16/10/2019 - 10:45 PM

The pelagic zone includes those waters further from the land; it is generally cold and is below the benthic zone, the upper level of the ocean. TRUE FALSE

The correct answer here is False. The Benthic Zone lies below the Pelagic zone, which is not what it shows in this question.

ANSWERED AT 16/10/2019 - 10:41 PM

QUESTION POSTED AT 16/10/2019 - 10:41 PM

Petrochemicals include things like _____. Plastics Paints Medicines All of the above

Petrochemicals include many things, I would say All of the above. Hope this helped! :)

ANSWERED AT 16/10/2019 - 10:34 PM

QUESTION POSTED AT 16/10/2019 - 10:34 PM

Plants need nitrate ions in order to make proteins. A plant is growing in soil flooded water. Explain why the plant cannot absorb enough nitrate ions.

Plants need nitrogen in order to form amino acids and absorb this in the form of nitrates from the soil. They do this with the help of their roots. In a waterlogged environment, roots start to decompose due to the lack of oxygen. This affects their nitrate absorption capacity and plant growth is stalled.

ANSWERED AT 16/10/2019 - 10:32 PM

QUESTION POSTED AT 16/10/2019 - 10:32 PM

The carbon cycle ensures that carbon is not lost. Which is another important benefit of the carbon cycle? The carbon cycle helps regulate Earth's temperature. The carbon cycle ensures that living things have a continual source of hydrogen. The carbon cycle helps transport nutrients in bodies of water. The carbon cycle ensures that there is a continual supply of water.

The correct answer is option A

The carbon cycle ensures that carbon is not lost. The another benefit of carbon dioxide is that it can regulate the Earth's temperature.

Carbon cycle plays an important role in balancing the global temperature by controlling the amount of carbon dioxide in the atmosphere.

Carbon dioxide being an important greenhouse gas that retains the heat generated by the earth and controls the temperature globally.

ANSWERED AT 16/10/2019 - 10:23 PM

QUESTION POSTED AT 16/10/2019 - 10:23 PM

In at least three sentences, describe why transitioning to a hydrogen economy has advantages. In at least three sentences, explain three disadvantages associated with hydrogen fuel use. Why is a high use of renewable energy necessary to make hydrogen fuel an environmentally sound alternative? Respond in one complete paragraph.

Hydrogen supply s abundant and its a cleaner i.e. renewable form of energy.
This is also non-toxic. The efficiency of this energy is also higher.
Disadvantages are that it is an expensive source of energy. Because of the low density of Hydrogen gas, its storage is difficult. The transportation of Hydrogen gas is also difficult due to its low density.

ANSWERED AT 16/10/2019 - 10:10 PM

QUESTION POSTED AT 16/10/2019 - 10:10 PM

Human activities _______. a. exacerbate the natural greenhouse effect b. create the greenhouse effect c. diminish the greenhouse effect d. eliminate the greenhouse effect

Answer: a.  exacerbate the natural greenhouse effect  


Greenhouse effect is a phenomena in which the the diatomic gases like carbon dioxide, carbon monoxide, methane, sulphur dioxide and nitrogen oxides traps the light energy from the sun which is responsible for increasing the global temperatures.

The human activities like burning of the fossil fuels, deforestation, and others can increase the abundance of greenhouse gases in the atmosphere. Therefore, a.  exacerbate the natural greenhouse effect  is the correct option.

ANSWERED AT 16/10/2019 - 09:50 PM

QUESTION POSTED AT 16/10/2019 - 09:50 PM

Earths oceans absorb carbon dioxide emitted by humans and other animals, and eventually turn it into carbonate rocks. Which ''spheres'' are part of this process? Select all that apply. Biosphere Exosphere Geosphere Cryosphere Atmosphere Hydrosphere


Option (1), (3), (5) and (6)


Carbon dioxide is a gas that is released by the living organism during respiration. This gas is then released into the atmosphere. This CO₂ gas is then carried to the lithosphere from the atmosphere with the help of rainfall. Now, these atmospheric CO₂ gas reacts with the water forming carbonic acid. Carbonic acid is a weak type of acid. This carbon is then squeezed and constricted to the sediments and muds, forming rocks such as shale and limestone.

Here, the carbon is present in the form of carbonate rocks.

Thus, this entire process takes place interacting with the biosphere, atmosphere, hydrosphere and geosphere.

Hence, the correct answer is option (1). (3), (5) and (6).

ANSWERED AT 16/10/2019 - 09:43 PM

QUESTION POSTED AT 16/10/2019 - 09:43 PM

Explain the meaning of tephra and how volcanic bombs, lapilli, and ash relate to tephra

Tephra Greek, for ash is a generic term for any airborne pyroclastic accumulation. ... Within this size classification, specific types of tephra can be further defined by ... Some lapilli- to bomb-size pyroclasts maintain a frothy appearance. 

ANSWERED AT 16/10/2019 - 09:29 PM

QUESTION POSTED AT 16/10/2019 - 09:29 PM

Explain what happens to the human body if one of the body systems is not functioning properly. Make sure to include the idea of homeostasis in your evidence and reasoning.

If one body part is not working properly, it affects others also. The direct influence of any such abnormality can be seen of the homeostasis of the body. If an infection occurs, it leads to release of the signals which also increase the body temperature, and homeostasis is disturbed. Similar is the case of the nervous system. If it is not working properly, hormones related to maintenance of homeostasis are affected and ultimately, other body systems including excretory and endocrine are directly affected. If circulatory system is affected, then plasma, which acts as a buffer system is hampered and a direct influence can be seen on heart and kidneys also. 

ANSWERED AT 16/10/2019 - 09:25 PM

QUESTION POSTED AT 16/10/2019 - 09:25 PM

Which of the following is not true concerning the layers of the Earth? a. The core is mostly composed of metals. b. The mantle has both solid and liquid regions. c. The layers of Earth are uniform in thickness. d. The lithosphere includes both the crust and upper, solid mantle.


C. The layers of Earth are uniform in thickness.


The earth is made up of three layers, the crust, the mantle and the core. Each layer has different characteristics and temperatures, becoming warmer as it approaches the core.

The Earth is formed by three layers that are not uniform in thickness, composition, or characteristic. These layers are:

  • Earth's crust: Most superficial layer, relatively thin structure and very rocky.
  • Mantle: Located below the crust, it has solid properties.
  • Core: Earth's warmest inner layer. It has two parts:
  1. Outer core: formed by nickel and liquid iron.
  2. Inner core: Also formed of nickel, but with solid iron.

ANSWERED AT 16/10/2019 - 09:19 PM

QUESTION POSTED AT 16/10/2019 - 09:19 PM

Question 1(Multiple Choice Worth 2 points) In which of the following environments would you NOT expect to find fossils? Active volcanic islands An area with high concentration of sedimentary rocks The Grand Canyon A shallow ocean Question 2(Multiple Choice Worth 2 points) Some species are no longer living but we know they existed at one time. We know this because scientists have discovered fossil evidence we have other species to prove it we have written records we have observations Question 3(Multiple Choice Worth 2 points) Phenotype describes the genetic makeup of an individual the actual genes in an individual the DNA in an individual the appearance of an individual Question 4(Multiple Choice Worth 2 points) The process of fertilization joins sperm and egg y and x chromosomes two daughter cells two parent cells Question 5(Multiple Choice Worth 2 points) The ____ can be described as the basic unit of life. atom neutron cell nucleus

Question 1(Multiple Choice Worth 4 points)

The people of the Peloponnesian peninsula  

shared a common language and religion

were at constant war with each other

were united because of the flat, open countryside which made it easy to travel between different communities

were separated by rugged hills leaving them disconnected and not united

Question 2(Multiple Choice Worth 4 points)

Which of the following was the origin of today's marathons?

the announcement of the Athenian defeat at the Battle of Marathon

the announcement of the Athenian victory at the Battle of Marathon

the announcement of the defeat of the Persians at Mount Marathon

the announcement of the victory of the Persians at Mount Marathon

Question 3(Multiple Choice Worth 4 points)

How was the Greek navy able to defeat the Persian navy?  

Greece had superior generals.

Greece had smaller, quicker ships.

Persian sailors were mainly slaves.

The Greek gods had received enough human sacrifices.  

Question 4(Multiple Choice Worth 4 points)

After the Persian War, what did Sparta, Athens, and other Greek communities collect to ward off future external attacks?


corn and other grains


resources for building walls

Question 5(Multiple Choice Worth 4 points)

Why did Pericles' strategy fail?  

The citizens of Athens stayed within an overcrowded walled city.  

Sparta's navy was able to defeat the Athenian navy.

Sparta's army was able to defeat the Athenian army.

The Persians joined the Spartans.  

Question 6(Multiple Choice Worth 4 points)

How did Pericles die?

at the hands of the Spartan army

at the hands of the Spartan navy

at the hands of the Persian army

during the Athenian plague.  please help me

ANSWERED AT 16/10/2019 - 09:17 PM

QUESTION POSTED AT 16/10/2019 - 09:17 PM

Explain how a change in the sequence of nitrogen bases in a dna molecule could result in a gene mutation

Well, the order and set processes of the nitrogen bases has dominance over the order of the amino acids in the protein. If the bases are altered or mutated, then the amino acids that theseems nitrogen bases code for, are changed. This leads to a different set of amino acids, and therefore a different protein. A different protein is composed, and then the gene containing this different protein will also be different. This has a greater overall impact on some genes than others, depending on which part of the DNA polymer/polymerase is mutated

ANSWERED AT 16/10/2019 - 09:10 PM

QUESTION POSTED AT 16/10/2019 - 09:10 PM

?hormones that cause increased activity in the ovaries and testes are known as

Sex hormones, since they are responsible for developing secondary sexual characteristics. 

ANSWERED AT 16/10/2019 - 09:10 PM

QUESTION POSTED AT 16/10/2019 - 09:10 PM

What differences can be observed in the structure of an artery and a vein?

Arteries are generally larger, undergo more blood flow, and exhibit more blood pressure. 

Veins are smaller than arteries, and can have valves in certain parts of the body. 

ANSWERED AT 16/10/2019 - 09:06 PM

QUESTION POSTED AT 16/10/2019 - 09:06 PM

A _________ is an integrated group of similar cells that perform a specific function


Hope it helps! 

ANSWERED AT 16/10/2019 - 09:05 PM

QUESTION POSTED AT 16/10/2019 - 09:05 PM

State and explain five precautions to be considered during the setup of the root pressure experiment.

The stem of the plant should be cut at least three to four centimeters above the surface level.
The stem should be tightly fixed into the glass capillary.
All connection should be made air-tight by using paraffin.
Initial and final readings should be carefully noted.

ANSWERED AT 16/10/2019 - 08:56 PM

QUESTION POSTED AT 16/10/2019 - 08:56 PM

Difference male and female reproductive system anatomy

Men have testicles, and a scrotum. Women have ovaries, uterus and a vagina. Also women have wider pelvises than men so that they can have children.

ANSWERED AT 16/10/2019 - 08:49 PM

QUESTION POSTED AT 16/10/2019 - 08:49 PM