A. Rock layers can be moved by fault activity.

How much more efficient is organic farming than "regular" farming? 10% 75% 50% 65%

Alexxandr [17]

Answer: 65% is the correct answer

3 0

1 year ago

In _______ a population isolated by a geographic barrier becomes a new species as it accumulates changes by natural selection or

Mashcka [7]

Answer:

The correct answer is allopatric speciation.

Explanation:

Allopatric speciation occurs when a geographical barrier comes between a species population living in the same area. This geographical barrier separates the population into two different geographical area which do not have the same condition.

So as both the separated population get different habitat environment to live so they evolve differently from each other. So natural selection and genetic drift works differently in both the population which brings genetic changes in the population and helps in creating a new species.

3 0

2 years ago

Suppose you discover a new form of a nucleic acid, XNA. Like DNA, it is double-stranded. You are interested in its mode of repli

victus00 [196]

Answer:

A: Unlike DNA, XNA replicates conservatively

Explanation:

The replication of the DNA is semi conservative. This means that newly replicated double helix DNAs usually consist of one parental strands and one newly synthesized strands. The parental DNA unwinds and each strand serves as template for the synthesis of complementary strands.

In the case of XNA, the two strands of parental XNA were found intact, meaning that the newly produced XNA consist of two newly synthesized strands. This thus means that the replication process is conservative.

Hence, unlike DNA replication that is semi conservative, XNA replication is conservative.

8 0

2 years ago

In garden peas, tall (T) vine is dominant over short (t) vine, and round pea pod (R) is dominant over wrinkled pea pod (r). Cro

Aleksandr [31]

Answer:

Explanation:

Given:

Traits

T (tall, dominant) and t (short)

R (round, dominant) and r (wrinkle)

Crossing parents

hetero-zygous. tall wrinkled (Ttrr)

phenotype tall is given hetero-zygous., so Tt

phenotype wrinkled is recessive, so must be homo-zygous rr

Foiled genotypes (Tr, tr, each with 50%)

short hetero-zygous. round (ttRr)

phenotype short is recessive, so homo-zygous rr

phenotype round is given heteroz. so Rr

Foiled genotypes (tR, tr, each with 50%)

Offsprings on a 4x4 punnett square

See diagram

6 0

2 years ago

Why do lymph nodes get swollen?

anzhelika [568]

Answer:

Lymph nodes become swollen in response to illness, infection, or stress.

Explanation:

Swollen lymph nodes are one sign that your lymphatic system is working to rid your body of the responsible agents.

3 0

3 years ago