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Zigmanuir [339]
3 years ago
15

Which particles cannot pass through the cell membrane?

Biology
1 answer:
kolezko [41]3 years ago
7 0

The most important property of the cell membrane is its selective permeability: some substances can pass through it freely, but others cannot. Small and non polar (hydrophobic) molecules can freely pass through the membrane, but charged ions and large molecules such as proteins and sugars are barred passage.

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Calculate the acceleration of a ball has been dropped from the roof. It accelerates from 10 m/s to 30 m/s in 2 sec. 1 point 15 m
Andre45 [30]

Answer:

10 m/s/s or m/s²

Explanation:

Acceleration can be calculated by using the formula;

a = v - u/t

Where;

a = acceleration (m/s²)

v = final velocity (m/s)

u = initial velocity (m/s)

t = time (s)

In other terms, acceleration (a) can be represented as ∆V/t.

According to this question, a ball accelerates from 10 m/s (u) to 30 m/s (v) in 2 seconds. Hence, the acceleration of the ball is as follows:

a = 30 - 10/2

a = 20/2

a = 10m/s².

4 0
3 years ago
A finite supply of resources can lead to natural selection in a population.
Nimfa-mama [501]
I believe (B) is the best option due that it mentions the reason causing natural selection with limited supplies competition increases making it more likely for the strongest individuals to survive
8 0
3 years ago
In a force of 5n to the left and 9n to the right act an object what is the net force
vaieri [72.5K]

Hello There!

The Net Force Is 4

First, let's remember that you find the "Net Force" of an object by the direction its going. In this case, they are both pointing in different directions.

Next, we find the "Net Force" by subtracting them and the one with the biggest force, you go in that direction.

Finally, once we subtracted 5 from 9 we get a "Net Force" of 4

7 0
3 years ago
Through which conversion is energy released?
Stels [109]

Answer: B) ATP to ADP

This reaction is termed as ATP hydrolysis.

ATP ( adenosine triphosphate) conversion to ADP ( adenosine diphosphate) is an energy producing reaction ( exothermic reaction). ATP contains high energy bonds called phosphoanhydride bonds. Thus, when this bond is broken down, ATP is converted to ADP and Pi ( inorganic phosphate) and  releases large amount of energy.

6 0
3 years ago
Read 2 more answers
Describe some improvements in the abiotic factors that support plant growth
aleksklad [387]
Abiotic variables found in terrestrial ecosystems can include things like rain, wind, temperature, altitude, soil, pollution, nutrients, pH, types of soil, and sunlight. The boundaries of an individual abiotic factor can be just as unclear as the boundaries of an ecosystem.These are often referred to as abiotic factors. Abiotic factors are non-living elements found within an ecosystem. There are six abiotic factors that affect plant growth: air, water, space, temperature, light and soil (nutrients).The two most important abiotic factors affecting plant primary productivity in an ecosystem are temperature and moisture.


LEARNING OBJECTIVE[ edit ]

Identify the abiotic factors that affect plant growth

KEY POINTS[ edit ]

Primary production, on which almost all of life on earth is dependent, occurs through either photosynthesis or chemosynthesis.
Annual biomass production, used to estimate net primary productivity by plants in an area, is directly influenced by an environment's abiotic factors, which include temperature and moisture.
Warm and wet climates have the greatest amount of plant biomass because they offer conditions in which photosynthesis, plant growth, and the resulting net primary productivity are highest.
TERMS[ edit ]

biomass
the total mass of all living things within a specific area, habitat, etc.

eco-region
a region, smaller than an ecozone, that contains a distinct biodiversity of flora and fauna

chemosynthesis
the production of carbohydrates and other compounds using the oxidation of chemical nutrients as a source of energy rather than sunlight; it is limited to certain bacteria and fungi
8 0
3 years ago
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