How to isolate Saccharomyces cerevisiae (Baker’s yeast)?

Biology

1 answer:

harkovskaia [24]3 years ago

3 0

Answer:

S. cerevisiae has been isolated from the plants, the bark and the leaves of the oak trees and the related soil. Recently, scientists have found that yeast is more common in oak leaf litter than in oak bark, and that leaf litter provides shelter all year round.

Explanation:

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Define what terms origin, insertion and tendon

artcher [175]

Answer:

Origin: In biology, origin can be described as the location where the muscle joins a stationary bone and as a result, no movement occurs.

Insertion: In anatomy, insertion can be described as the point of attachment which allows movement of a bone to occur. It moves when the muscles contract.

Tendon: In biology, the tendon can be described as a type of connective tissue which attaches a bone to a muscle.

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3 years ago

In Guinea pigs, short hair is dominant and long hair is recessive. A

larisa86 [58]

Answer:

a. S represents allele for short hair while s represents allele for long hair.

b. Ss (male) × ss (female)

c. 50% Ss, 50% ss

d. 3 long hair (ss), 3 short hair (Ss)

Explanation:

This question involves a single gene coding for hair length in guinea pigs. The allele for short hair (S) is dominant over the allele for long hair (s).

a. Letter "S" will represent the allele for short hair while letter "s" will represent the allele for long hair.

b. According to this question, a heterozygous male is crossed with a long-haired female. The genotype of the male guinea pig is "Ss" while that of the female is "ss". (see attachment for the punnet square)

c. The possible genotypes of the offsprings in this cross are: Ss and ss, each carrying 50% each as they are produced in a ½ Ss: ½ ss.

d. Since 50% of the offsprings will be both short haired and long haired, If they have six babies, 3 of them will be short-haired while 3 of them will also be long-haired.