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bezimeni [28]
3 years ago
8

A structure within a cell that performs a specific function is called a(n)

Biology
2 answers:
Vikki [24]3 years ago
6 0

Answer:

It's an organelle

Explanation:

PolarNik [594]3 years ago
6 0

Answer:

organelles are structures within a cell that performs a specific function

Explanation:

they are suspended in the cytoplasm (fluid)

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How does the photosynthetic reaction center differ from the chorophyll molecules in the antenna complex?
o-na [289]

Answer:

Photosynthetic reaction center differ from the chlorophyll molecules in the antenna complex by the presence  and absence of core pigment and accessory pigment.

Explanation:

Photosynthetic reaction center contain core pigment known as chlorophyll  A which can aborb wavelength of sunlight not more than 700 nm in case of Photosystem 1 and the core chlorophyll pigment of Photosystem 2 absorb light having wavelength of 680nm or less than that.

                           Antenna complex or light harvesting complex  such as chlorophyll b ,Carotenoid,Xanthophyll absorb light energy from sunlight and transfer that light energy to photosynthetic reaction center by resonance energy transfer so that the photosynthetic reaction center uses the same(light energy) in form of chemical energy to out the further reactions of photosynthesis.

             

5 0
3 years ago
What is the Mechanical energy when
Scilla [17]

Answer:

ME = 20 * m, where m is the mass of the pendulum

Explanation:

As we know that mechanical energy is the sum of kinetic energy and potential energy.

Since the Pendulum at its highest point has zero velocity, its kinetic energy at this point is equal to zero.

Thus, here in this mechanical energy will be equal to the potential energy only.

Potential energy is equal to the product of gravity constant, mass of the body and the height of the pendulum

Thus,

ME = PE\\

PE = m * g* h\\PE = 10 * 2* m\\

PE= 20m

Hence,

ME = 20 * m

5 0
3 years ago
Question 1 (2 points)
ch4aika [34]

Answer:genetic drift

Explanation:

3 0
3 years ago
Sickle-cell trait is caused by a single defective allele, but sickle-cell disease only occurs in individuals that are homozygous
Pavel [41]

Answer:

6,25%

Explanation:

Considering that the couple has a trait of sickle cell anemia, we know that both are heterozygous for the disease (Aa) and therefore can have children with the following genotypes:

Parents: Aa X Aa

Children: AA(A x A), Aa(A x a), Aa (a x A) and aa(a x a)

Knowing that sickle cell anemia only occurs in homozygous individuals, the probability for children to have the disease according to each crossing is:

A x A = 1/4 = 25%

A x a = 1/4 = 25%

a x A = 1/4 = 25%

a x a = 1/4 = 25%

The probability of forming each homozygous child (aa) is 1/4 or 25%. Since they are two children, the probability of both having sickle cell anemia is calculated by multiplying the probability of each, so:

1/4 × 1/4 = 1/16 = 0.0625 = 6.25%

It is concluded that the probability of a heterozygous couple for sickle cell anemia to have two children with the disease is 6.25%.

6 0
3 years ago
What is the function of the Pleurae?
Doss [256]

Answer:

The function of the pleura is to allow optimal expansion and contraction of the lungs during breathing. The pleural fluid acts as a lubricant, allowing the parietal and visceral pleura to glide over each other friction free. This fluid is produced by the pleural layers themselves.

8 0
2 years ago
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