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Natasha2012 [34]
3 years ago
12

Which layer confirms that this sample is soil rather than a mineral mixture?

Biology
2 answers:
ser-zykov [4K]3 years ago
4 0
Which layer confirms that this sample is soil rather than a mineral mixture?organic matter
Andreyy893 years ago
4 0

sllllllliiiitttttttttttttttttttttttttttttttttttttttttttttttttttttt

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Attached earlobes are recessive to free earlobes. What genotypic ratio is expected when an individual with attached earlobes mat
Marianna [84]

Answer:

C

Explanation:

This is a monohybrid cross between involving a gene coding for earlobe. The allele for free earlobe (F) is dominant over that of attached earlobe (f).

N.B: let F represent the gene involved.

A genotypic ratio is the ratio derived from the offsprings based on the actual genetic make-up and not based on their phenotypic appearance as in phenotypic ratio.

A homozygous individual is an individual having the same kind of alleles for a gene while a heterozygous individual is one that has two different alleles i.e. combination of the dominant and recessive allele.

The monohybrid cross is between an individual with attached earlobe (ff) i.e. homozygous recessive individual. (Note that, a recessive trait will only be expressed in a homozygous state) and a heterozygous free earlobeb individual (Ff). (See attached picture). Ff × ff

The resulting four offsprings will

be expected to have only two distinct genotypes i.e heterozygous (Ff) and homozygous recessive (ff) in an equal ratio i.e. 2:2 ~ 1:1

4 0
2 years ago
Lord howe island is a volcanic island in the tasman sea that is about 11 km long and 2.8 km wide. the island has two species of
Alenkinab [10]

<u>Answer</u>: Hybridization.

Hybridization is the process through which two species can mate with each other and produce fertile offspring thus creating a new species.

This is not happening with the two palm species on the island. This may be due to prezygotic barriers that prevent these two species from mating and producing a zygote (fertilized egg cell). In essence these barriers prevent any gene flow between the two species.

7 0
3 years ago
Read 2 more answers
Cell organelles can be seen with a light microscope true or false
Rama09 [41]

yes, cell organelles can be seen with a microscope

8 0
3 years ago
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What is the importance of wax to birds and insects?
arsen [322]
To cross pollinatesjejjsjje
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Please help me with this drawing contour lines. I will mark your brainlist if you answer it correctly.
Keith_Richards [23]

Explanation: Use these images to find the borderlines and to understand what they are.

BRAINLIST PLS!

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