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hammer [34]
3 years ago
6

Earth's biosphere is described as

Biology
2 answers:
EleoNora [17]3 years ago
9 0

the zone of life. The sum of all life on Earth.  

svet-max [94.6K]3 years ago
5 0
The biosphere is sometimes thought of as one large ecosystem—a complex community of living and nonliving things functioning as a single unit. More often, however, the biosphere is described as having many ecosystems. People play an important part in maintaining the flow of energy in the biosphere.
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Two of the risk factors for Down's syndrome include which of the following?
Gala2k [10]

Answer:increased age of female is one of them. The other one is infectious hepatitis

Explanation:

3 0
3 years ago
Describe the events that occur during meiosis that are defined by Mendel's laws of segregation and independent assortment. Expla
zysi [14]

Answer:

Mendel's Laws are a set of basic rules on the inheritance of characteristics from parent organisms to their children. They are considered rules rather than laws, since they are not fulfilled in all cases. Mendel's first Law of equitable segregation establishes that during the formation of the gametes each allele of a pair is separated from the other member to determine the genetic constitution of the filial gamete, the two alleles, which code for each characteristic, are segregated during the production of gametes through meiotic cell division. This means that each gamete will contain only one allele for each gene. This allows the maternal and paternal alleles to combine in the offspring, ensuring genetic variation. For each characteristic, an organism inherits two alleles, one for each relative. This means that in somatic cells, one allele comes from the mother and one from the father.

Explanation:

Mendel's laws reflect chromosomal behavior during meiosis: the first law responds to the random migration of homologous chromosomes to opposite poles during anaphase I of meiosis (both alleles and homologous chromosomes segregate equally or 1: 1 in gametes) and the second law, to the random alignment of each pair of homologous chromosomes during metaphase I of meiosis (whereby different genes and different pairs of homologous chromosomes segregate independently).Even though not all genes are inherited in the proportions described by Mendel, they are undoubtedly all inherited in the same way, that is, the alleles or different alternatives of a gene are separated in meiosis and each gamete will carry only 1 of them (2nd Mendel's Law) and in turn all genes on different pairs of chromosomes are transmitted independently. This allows the maternal and paternal alleles to combine in the offspring, ensuring genetic variation.Therefore, of each possible genotype for a two three or more genotypes it is possible to know how many gametes it will form, in what proportions and therefore predict results of crosses.

8 0
3 years ago
Which best decribes the realtion ship beetween dna and rna
GrogVix [38]

RNA is a copy of DNA that is used to make proteins. We usually compare all eukaryotic cells as a group to all prokaryotic cells.

7 0
3 years ago
Researchers want to use eDNA to look for an invasive species in a waterway.
balu736 [363]
The answer is A.
the researchers would not be able to compare the samples and cut the DNA when samples from the waterway are not collected.
6 0
3 years ago
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WILL GIVE BRAINLEST 20POINTS PLS HURRY!!!!!!!!
Marrrta [24]
Carlos is the answer
3 0
3 years ago
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