Isolation in Nature: A Study Into Human Response to the Natural Environment
Answer:
Peptidoglycan
Explanation:
Peptidoglycan (murein) consists of sugars and amino acids that forms a mesh-like layer outside the plasma membrane of most bacteria. Peptidoglycan is a unique and essential structural component in the cell wall of most bacteria, and it is used stimulates innate immune responses. Peptidoglycan determines the cell form and provides rigidity to the cell wall.
Peptidoglycan is an excellent target for antibiotics because it protects the bacteria cell wall.
Answer:
B
Explanation:
According to Mendel, an organism receives two forms of a gene from each parent. This form received by each parent is called an ALLELE. An allele is the variant form of a gene for a particular trait.
For a diploid organism, two copies of genes (alleles) are acquired by an organism. The combination of these alleles from each parent determines the genotype for that gene.
In Mendel's experiments, he discovered that one allele can mask the expression of another for a trait. He called the allele that masks DOMINANT allele while the allele that is masked RECESSIVE allele. The combination of these alleles, whether two dominant or two recessive called HOMOZYGOUS or one dominant and one recessive called HETEROZYGOUS, determines the phenotype of the organism for that gene.
N.B: There are exceptions to this pattern of inheritance.
They have a nerve tissue located in the head end that can detect objects through its sense organs. The sense organs are sensitive to light, touch and vibrations.
Answer:
A Punnett square is a diagram used to determine the statistical likelihood of each possible genotype of the offspring of two parents for a given trait or traits. Reginald Punnett was applying the laws of probability to work pioneered by Gregor Mendel in the mid-1800s.
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