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djverab [1.8K]
2 years ago
15

a class contains 8 men and 12 women. which fraction represents the ratio of women to all the students in the class?

Biology
2 answers:
Naily [24]2 years ago
7 0
12/20 I think that’s the answer
Licemer1 [7]2 years ago
5 0
12/20 is the answer I think. I hope this helps you!!
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In what ways are cellulose and starch similar to each other and in what ways are they different? Be specific in your comparison,
Tom [10]
By starch, I'm assuming you mean glycogen, or animal starch.
Similarities:
Both are polysaccharide molecules made from glucose molecules linked together in a long chain.
Both are storehouses of energy.

Differences:
Glycogen is made in animal cells and is the only form of starch animals can digest (unless they have certain microbes in their intestinal tracts to break down cellulose, which all herbivores need).
Cellulose is made in plant cells.

The bonds are a bit different; the molecules are isomers. Glycogen bonds with what is called an alpha 1,4 bond, meaning that the first carbon of one glucose molecule is bonded to the 4th carbon of the next glucose molecule, but in a way that puts the bonds in a shape that falls below the plane of the molecule, and allows branching.

Cellulose bonds with beta 1,4 bonds. The first and fourth carbons of adjoining glucose molecules are still connected, but the shape of the bond falls above the plane of the molecule and does not branch.

Since enzymes are specific to their substrates, the enzymes shaped to fit glycogen bonds do not fit on cellulose bonds, which is why animals cannot digest cellulose on their own. In herbivores, there are microbes in their digestive tracts which can produce enzymes to break these bonds so the glucose can be used. In carnivores and omnivores like humans, there is no enzyme to break down cellulose so it becomes 'roughage' in our diets. It passes through the digestive tract without being broken down.
4 0
3 years ago
What global climatic change gave gymnosperms an advantage over ferns?
luda_lava [24]

Answer:

it is D

What global climatic change gave gymnosperms an advantage over ferns?

A) Increased fluctuations in global climate

B) the climate becoming hotter and wetter

C) the climate becoming cooler and drier

D) the climate becoming hotter and drier

4 0
3 years ago
the graphs showas a result from two experiments into how fast an enzyme works at a different temperature and at different pH it
GalinKa [24]

Explanation:

where is the graph sir??

5 0
2 years ago
✧・゚: *✧・゚:* hello *:・゚✧*:・゚✧
In-s [12.5K]

Answer:

c

Explanation:

If you wanted to reduce health risks, why make more?

7 0
3 years ago
How many combinations of genotypes are possible for the coat coloration of rabbits which is governed by three alleles?
Dmitriy789 [7]

Answer:

b) 6

Explanation:

There are three different alleles (A,B,C) which are responsible for coat coloration but only combination of two can move forward because there are two loci at every homologous pair of chromosomes.

Thus, six combinations can be formed as AA, AB, AC, BB, BC, CC.

7 0
3 years ago
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