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Allushta [10]
2 years ago
11

Totipotent stem cells are cells with the capacity to form

Biology
1 answer:
melomori [17]2 years ago
3 0
True I’m pretty sure I just checked it and it said true so
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True or false: Active transport is required to more particles from an area of lower
LUCKY_DIMON [66]
That is true. Active transport goes against the concentration gradient. Particles want to move from higher concentration to lower concentration and even out, but active transport makes them move against that.
7 0
2 years ago
List and describe the most important erosional and depositional features of a river and how these features form.
Mkey [24]

Answer:

Meanders

As the river makes its way to the middle course, it gains more water and therefore more energy, so material can be carried in suspension and is used to erode the river banks. Lateral erosion starts to widen the river. When a river flows over flatter land it develops large bends called meanders.

As a river goes around a bend, most of the water is pushed towards the outside. This causes increased speed due to less friction and therefore increased erosion (through hydraulic action and abrasion).

The lateral erosion on the outside bend causes undercutting of the river bank to form a river cliff.

There is less water on the inside bend of a meander so friction causes the water to slow down, lose energy and deposit the material the river is carrying, creating a gentle slope.

The build-up of deposited sediment is known as a slip-off slope (or sometimes river beach).

The fast current on the outside bank causes lateral erosion, creating a river cliff. The slow current on the inside bank causes deposition, creaitng a slip-off slope.

Oxbow lakes

Due to erosion on the outside of a bend and deposition on the inside, the shape of a meander will change over a period of time. Erosion narrows the neck of the land within the meander and as the process continues, the meanders move closer together. When there is a very high discharge (usually during a flood), the river cuts across the neck, taking a new, straighter and shorter route. Deposition will occur to cut off the original meander, leaving a horseshoe-shaped oxbow lake.

Erosion makes the neck narrow. During floods, the river takes the shortest course through the neck. The river has a new straighter course and the abandoned meander is called an oxbow lake.

Explanation:

3 0
2 years ago
Which has makes up the largest amount of smog around cities
zavuch27 [327]
Cars, Automobiles, transportation, the burning of fossile fuels (gas). Anything that mentions car or car functions lol
4 0
3 years ago
Which of the following statements concerning viruses is true?
zysi [14]

Answer:

The second statement is correct: "The "host range" for a virus is determined by the presence or absence of particular components on the surface of a host cell that are required for the virus to attach."

Explanation:

The virus attaching itself to the host cell is the first step for it to successfully infect the host. Viruses are smaller in size than bacteria, so the first statement is incorrect. The third statement is incorrect because viruses do not have the necessary machinery to carry out protein synthesis or to generate ATP, this precisely why they seek out a host to begin with. The fourth statement is false because the virus will either have DNA or RNA, but both at the same time.

Hope that answers the question, have a great day!

6 0
3 years ago
Plant cells, unlike animal cells, are characterized by the presence of a ________.
expeople1 [14]

B. Cell wall and a central vacuole

The cell wall is a rigid structure that surrounds the cells and allows plants to stay upright.  Animal cells are more fluid.

The central vacuole is a large region in the cell that stores nutrients and fluids.  Many cells, including animal cells, contain vacuoles, but most are small, and only plant cells contain large central vacuoles.

Hope this helps!!

8 0
2 years ago
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