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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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Why are peas a good model system for studying heredity?
MissTica

Answer:

fast growing and produce many offspring

Explanation:

The life history of a species is the pattern of survival and reproduction events typical for a member of the species (essentially, its lifecycle).

7 0
3 years ago
One of the questions early geneticists had to answer was how only four nucleotides can specify placement of 20 amino acids in pr
jenyasd209 [6]

Answer:

<h2>Codon </h2>

Explanation:

The sequence of DNA is transcribed into mRNA, containing the sequence  for protein synthesis, protein is synthesized according to the codons in mRNA.  This sequence of nucleotide on DNA/ RNA is divided into a series of three nucleotide units, and one unit of three nucleotide is  known as codons.

There are overall 64 codons, 61 codons out of 64 codons, codes for overall 20  amino acids, and the remaining three  are stop codons.

These there codon do not code for any amino acid.

And these 61 codons, they  code for total 20 amino acids. So one amino acid can be coded by one or more than one codons.

6 0
4 years ago
2. What alleles code for a female?
emmainna [20.7K]
X ( inherited ) chromosomes!!!!!!!!!!!!!!!!!!!!!
8 0
3 years ago
Does human intervention affect small-scale ecosystems differently than large-scale ecosystems?
sdas [7]

Answer: No

According to <u><em>BBC</em></u>, Human activities such as harvesting plants and hunting animals can unbalance the flows and cycles within those [SMALL SCALE ECOSYSTEMS ]ecosystems. Tree-felling may lead to soil erosion and a loss of habitat. Lack of shade and moisture in the soil can result in desertification.

According to <u><em>National Geographic</em></u>, Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.

GIVE BRAINLIEST :)

7 0
3 years ago
Binary ionic compounds are named in what pattern
Andre45 [30]
Binary ionic compounds are named in the pattern of metal, then nonmetal.

I hoped this helped.
3 0
3 years ago
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