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3 years ago

An unknown mineral is scratched by a penny. It must _____

2 answers:

7 0

This is about Mohs Scale of mineral hardness.

At a 2 it can be scratched by a penny.

Gypsum is a mineral at this hardness.

Based on this info, it is either a 2 or a 1 on the scale.

So likely Gypsum or Talc.

damaskus [11]3 years ago

3 0

I think that it is softer than a diamond. As we all, a diamond is considered the hardest mineral and cannot be scratched by any kind penny.

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In clover plants, the pattern on the leaves is determined by a single gene with multiple alleles that are related in a dominance

igomit [66]

Answer:

The correct answer is -

a. 7

b. 7 (p1p1, p1p2, p1p3, p1p4, p1p5, etc

c. p7 is abundant

Explanation:

According the question the dominance of the big leaves is p7 > p6 >p5 >p4 >p3 >p2 >p1 where 1 represent least dominance and 7 represent most dominance

let represent the phenotype with the numbers 1 to 7 and genotype with a combination of these numbers so the genotype in respect of phenotype would be :

p7p7,p7p6, p7p5, p7p4, p7p3, p7p2, p7p1 - most dominant 7

p6p6, p6p5, p6p4, p6p3, p6p2, p6p1 - 6

p5p5, p5p4, p5p3, p5p2, p5p1 - 5

p4p4, p4p3, p4p2, p4p1 - 4

p3p3, p3p2, p3p1 - 3

p2p2, p2p1 - 2

p1p1- 1 least dominant

Thus, there are 28 different combinations or patterns of genotypes. 7 phenotypes patterns.

6 0

3 years ago

A horse has 64 chromosomes and a donkey has 62. Using your knowledge of meiosis, explain why a cross between a horse and a donke

nlexa [21]

Ok, so when a horse (with 64 chromosomes) is crossed with a donkey(that has 62 chromosomes), each parent give its child half of its chromosomes. [64/2=32] [62/2=31]. So the mule gets 31 pairs of chromosomes plus 32 pairs of chromosomes. That equals 63 total chromosomes. In order to be a parent, it must give <span>half of its chromosomes to its child. [63/2=31.5] You can't have half a chromosome, so the mule is a sterile organism. Let me know if you have questions.</span>

8 0

3 years ago

a reaction that hydrolyzes a phosphodiester bond would cleave a dna molecule between a phosphate group and:

Gnoma [55]

Reactions that hydrolyze the phosphodiester bonds split the DNA molecule between the phosphate groups and the hydroxyl groups of the two sugar groups.

In DNA there is a covalent bond through a phosphate group that connects the hydroxyl group (OH) at the 5' position of the pentose sugar and the hydroxyl group at the 3' position of the pentose sugar of the next nucleotide. This covalent bond is called a phosphodiester bond because chemically the phosphate group is in the diester form.

In other words, the phosphodiester bond connects the sugar in one nucleotide to the sugar in the next nucleotide, so this bond simultaneously connects the two consecutive nucleotides to form a polynucleotide chain. If there is an enzyme that catalyzes the hydrolysis of covalent bonds that combine nucleotides, what happens is that the phosphodiester link between deoxyribose sugars will break.

Learn more about the phosphodiester bonds at brainly.com/question/23660733

#SPJ4

6 0

1 year ago

Approximately how many gallons of water are used per year in a typical home?

spayn [35]

According to the USGS, the average annual gallons of water households use is 29,219.376, or 36,524.22. =)

5 0

3 years ago

Read 2 more answers

Challenge: Make another comparison.<br> Earth's outer layer is like

Dmitrij [34]

Earths outter layer is like the glass on a lightbulb because it keeps the inside of the lightbulb straight, and also protects you from getting electrocuted (sry if this is wrong, i tried my best to try to help) :))

6 0

3 years ago