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kolezko [41]
2 years ago
14

What is a gene?

Biology
2 answers:
OLga [1]2 years ago
6 0

Answer:

b. a segment of a DNA molecule.

cestrela7 [59]2 years ago
6 0

Answer:

a segment of a DNA molecule.

plz mark me as brainliest:)

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Differentiate between the layers of the Earth based upon physical properties AND explain the flow of heat within and between the
tino4ka555 [31]

Answer:

The Earth can be divided into 5 main layers according to their physical properties: the lithosphere (most superficial layer of the Earth: rigid and cold), the asthenosphere (Second most superficial layer of the Earth: soft and ductile), the mesosphere or lower mantle ( Middle layer of the Earth: rigid and hot, able to flow gradually), the outer core (Second innermost layer of the Earth: liquid) and the inner core (innermost layer of the Earth: solid). The flow of heat inside the Earth will depend on the temperature and the characteristics of the material. The crust behaves like a solid and has relatively low temperatures. The mantle behaves like a fluid and since convection is much more efficient in this case, that is the main means of transport, even though the relatively high temperatures make it possible for energy to also be transported by means of radiation.

Explanation:

As you descend into the Earth's interior, the temperature, pressure, and density of the rocks gradually increase. The Earth can be divided into five main regions based on its physical properties (temperature and pressure) and according to its mechanical resistance: lithosphere the chemical composition of this layer is notably different, it also acts as a unit that shows a rigid behavior (not can be bent), mainly because it is cold and consequently resistant, asthenosphere located in the upper mantle (at a depth of about 660 km), there is a comparatively plastic soft layer, mesosphere (lower mantle) more rigid layer and it is because as the pressure increases, it counteracts the effects of the higher temperature and the resistance of the rocks increases gradually with depth. Despite their resistance, the rocks of the mesosphere are still very hot and are able to flow in a very gradual way, the outer core is a 2270 km thick liquid layer. The convective currents of iron in this area are those that generate the Earth's magnetic field and the inner core of the material is more resistant than the outer core (due to the enormous pressure to which it is subjected) and behaves like a solid. When penetrating the crust of the Earth a change in temperature is observed, in general it increases; this variation in temperature with depth is called a geothermal gradient. The heat flux on the Earth's surface is calculated as the product of the geothermal gradient and the thermal conductivity of the rocks, these two parameters being directly determined. The Earth is basically made up of three concentric layers: the innermost core has a composition of cast iron at a temperature of over 4,000 ºC; the mantle that is the intermediate layer formed by iron and magnesium silicates and its temperature varies from 4,000 ºC in its contact with the core to 800-1000 ºC of its outer surface that contacts the crust that is the most superficial layer and visible by man. This crust has a variable thickness of 5 to 35 km and is made up of aluminum and magnesium silicates, its temperature varying between 800-1000 ºC of contact with the mantle and 15-20 ºC of the surface that we know.

3 0
3 years ago
Compare the pigment found in spinach, hibiscus leaf, purple cabbage and green lettuce
muminat
The pigments found in spinach are:
Betalains Xanthophylls  Chlorophyll a & bAnthocyanins Pheophytin a & bCarotenes 
The pigment found in Hbiscus leaf is:
daphniphylline
The pigment found in purple cabbage is:
Anthocyanins
chlorophyll
carotenoids
The pigment found in green letuce is:
chlorophyll
carotenes
8 0
3 years ago
What is genotype is type 0 blood?​
Eva8 [605]

Answer:

Someone with blood type O has neither the A nor the B allele

Explanation:

The genotype must be AB. Someone with blood type O has neither the A nor the B allele. The genotype must be OO.

4 0
3 years ago
What determines the sex of an organism, the male sperm cell or the female egg cell? ______
Liono4ka [1.6K]

Answer:

sperm cell contains the x or y

Explanation:

please give brainliest

4 0
3 years ago
Read 2 more answers
Number the steps of the binary fission process in correct order
kari74 [83]

Step 1:

The bacterium cell must copy its DNA so the new cells will have DNA. DNA or, deoxyribonucleic acid, has all of the information the bacterium will need to survive, so it is important it gets copied. The DNA is tightly wound so it is in a neat package called a chromosome.

Steps 2 and 3:

The bacterium now grows larger. This allows for some separation between the two DNA copies that are inside the cell. A division develops in the middle of the bacterium. This division eventually completely divides the bacterium in half. This is called cytokinesis.

Step 4:

Each cell is now called a daughter cell and they separate.

The steps of binary fission

binary fission

Binary fission results in two identical daughter cells. This is a type of asexual reproduction, or creating genetically identical offspring. If humans were able to reproduce using binary fission, it would look something like this: your mother or father would grow larger, and inside all of his or her DNA would be copied. Eventually your parent would split in half creating an identical clone.

5 0
3 years ago
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