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igomit [66]
3 years ago
8

The exchange of oxygen, food, and waste between mother and fetus occurs at.....

Biology
1 answer:
Luba_88 [7]3 years ago
8 0
The placenta and the umbilical cord 
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What are the similarities and differences between the water and carbon cycles?
Misha Larkins [42]
Difference: Carbon cycle requires life, and the water cycle just requires sunlight. So former would continue to occur without life, but the latter would not. 

Similarity: They both use Plants as an Integral component. <span>The </span>water cycle<span> uses plants for uptake of </span>water and transpiration from the surface whereas carbon<span> is used in photosynthesis and also form the body of the plant (through various organic molecules)

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4 0
3 years ago
In a hypothetical population of plants, flower color is determined by a single gene with two alleles. In a population of 500 pla
blondinia [14]

Answer:

In the F1 generation

RR = 0%

Rr = 50% (or 0.5)

rr = 50% (or 0.5)

Explanation:

A pink flowering plant has the genotype Rr. It is heterozygous for the allele. The alleles for this gene appears to show incomplete dominance, as the heterozygous phenotype is a blend of the two homozygous genotypes.

A white flowering plant has the genotype rr. It is homozyogous for the white allele

A punnet square of the cross is shown.

The resulting punnet square shows that only Rr and rr genotypes are possible, at a ratio of 50:50 (or 1:1). Therefore, the genotype frequency of Rr is 50%, and rr is 50% in the F1 generation. This can also be written as 0.5. It is not possible to get a red plant, as the genotype RR can not come from this cross

Download pdf
8 0
3 years ago
• An ecosystem only has a certain amount of
labwork [276]

Answer:

An ecosystem only has a certain amount of resources to support a certain number of organisms.

Explanation:

An ecosystem consist of resources and organisms. Resources are the material which are responsible for the survival of living organisms in that ecosystem. Examples of resources are light, water, oxygen and food substance. In the absence of these resources, organisms will die.

7 0
3 years ago
Who developed a system for naming and classifying organisms that is still used today?.
WINSTONCH [101]

Answer: Carolus Linnaeus

Explanation:

Carlos Linnaeus created the binomial nomenclature system which gives scientific names to animals. Their genus and species is what classifies organisms.

Linnaeus also created the taxonomic system, which classifies organisms within different groups and subsets.

hope this helped! ♡

4 0
2 years ago
Read 2 more answers
BEST ANSWER GETS BRAINLIEST FOLLOW FIVESTAR AND THANK YOU
FinnZ [79.3K]

Answer:

By researching, I would think that the answer is D. Ice crystals melt as they fall through a warm layer of air and then refreeze into small ice pellets as they pass through a colder layer of air.

Explanation:

<em>During precipitation formation, if temperatures are at or below freezing, 0°C (32°F), at cloud level, water in the air freezes into ice crystals, and the crystals stick together to make snow. The snow starts to fall, and if the air column is freezing cold all the way down from the clouds to the ground, the precipitation stays frozen. It simply falls as snow.</em>

<em />

<em>Sometimes, however, a temperature inversion occurs. Normally, the temperature decreases with increasing altitude. A temperature inversion is when a layer of warm air intrudes between the ground and the clouds.</em>

<em />

<em>Under these conditions, when the falling snow reaches the layer of warm air, it melts. Then it hits the layer of cold air just above Earth’s surface and refreezes. This all happens very fast, and the result is tiny ice pellets called sleet.</em>

7 0
3 years ago
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