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olganol [36]
3 years ago
8

Are the cell membrane and mitochondrial membrane permeable to gases

Biology
1 answer:
Fofino [41]3 years ago
6 0

Answer:

They are semi-permeable, which means that some molecules can diffuse across the lipid bilayer but others cannot. Small hydrophobic molecules and gases like oxygen and carbon dioxide cross membranes rapidly.

Explanation:

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The exchange of substances between the blood vessels and the surrounding tissues can only happen in the ___________.
natka813 [3]

Answer:

The exchange of substances between the blood vessels and the surrounding tissues can only happen in the <u>capillaries</u>.

Explanation:

Capillaries are the exchange vessels of our body. They form a network-like structure, called the capillary area. When blood, from the larger arterioles, spreads through the many capillaries in the capillary area, the blood pressure drops and the blood flows only at a slow speed. Through the thin, semi-permeable walls of the capillaries, the exchange of gas and substances between the blood and the surrounding tissue then takes place. Subsequently, blood continues to flow through the postcapillary venules, to which the capillary area has been reconnected. Blood pressure and blood flow increase and blood eventually reaches the heart through enlarged veins.

5 0
3 years ago
Brown fur is dominant to white fur in mice. in a population of mice, 64% have brown fur and 36% have white fur. based on these f
tester [92]

<span>a.       </span>The frequency of the dominant allele: ___0.4______

<span>b.      </span>The frequency of the recessive allele: ____0.6_____

<span>c.       </span>The percentage of mice that are homozygous dominant: __16%_______

<span>d.      </span> The percentage of mice that are heterozygous: _48%________

<span>e.      </span>The percentage of mice that are homozygous recessive: __36%_______

 

Let us assign the dominant allele (that of brown hair) letter R while

We assign the recessive allele (that of white hair) letter r

We then note down the Hardy-Weinburg equation p2 + 2pq + q2 = 1

Brown fur population (p2 + 2pq) = 64% = 0.64

White fur population (q2) = 36% = 0.36

Then we also remember that the frequencies of both allele add up to 1 (p + q = 1);

Therefore q = ü.36 = 0.6

P = 1 – q = 1 – 0.6 = 0.4

The heterozygous population will be 2*0.6*0.4 = 0.48 =  48%

Homozygous domain population will therefore be (64% - 48%) = 16%






6 0
3 years ago
Will give Brainliest within five minutes of answer - Why do we want to explore Mars more than the other planets/moons even thoug
Ipatiy [6.2K]

Answer:

After the Earth, Mars is the most habitable planet in our solar system due to several reasons:

Its soil contains water to extract

It isn’t too cold or too hot

There is enough sunlight to use solar panels

Gravity on Mars is 38% that of our Earth's, which is believed by many to be sufficient for the human body to adapt to

It has an atmosphere (albeit a thin one) that offers protection from cosmic and the Sun's radiation

The day/night rhythm is very similar to ours here on Earth: a Mars day is 24 hours, 39 minutes and 35 seconds

The only other two celestial bodies in orbits near the Earth are our Moon and Venus. There are far fewer vital resources on the Moon, and a Moon day takes a month. It also does not have an atmosphere to form a barrier against radiation. Venus is a veritable purgatory. The average temperature is over 400 degrees, the barometric pressure is that of 900 meters underwater on Earth, and the cherry on top comes in the form of occasional bouts of acid rain. It also has nights that last for 120 days. Humans cannot live on Mars without the help of technology, but compared to Venus it's paradise!

Additional info:

Mars is an obvious target for exploration because it is close by in our Solar System, but there are many more reasons to explore the Red Planet. The scientific reasons for going to Mars can be summarised by the search for life, understanding the surface and the planet’s evolution, and preparing for future human exploration.

<u>Searching for life on Mars</u>

Understanding whether life existed elsewhere in the Universe beyond Earth is a fundamental question of humankind. Mars is an excellent place to investigate this question because it is the most similar planet to Earth in the Solar System. Evidence suggests that Mars was once full of water, warmer and had a thicker atmosphere, offering a potentially habitable environment.

5 0
3 years ago
A local recreation center has received funding to build a swimming pool. Prior to pool construction, engineers use computer mode
mario62 [17]

Answer:

D. Pool temperature

Explanation:

The dependent variable in an experiment is the variable that is measured or responds to another variable called the independent variable. The outcome of the dependent variable is dependent on the independent variable.

In this computer model, the engineers compare which of several pool designs require the least amount of energy to be heated. The TEMPERATURE at which each pool design is heated is dependent on the type of pool design used. Hence, POOL TEMPERATURE is the dependent variable. It is the variable being measured in response to the type of pool design used.

7 0
4 years ago
Water is water warmed by
Alja [10]
Um, Water is Water warmed by? that does not sound right XD
7 0
3 years ago
Read 2 more answers
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