Answer:Option B
The memory response is due to long lived cells that can respond rapidly to second exposure.
Explanation:
Immunological memory is the ability of the immune system to quickly identify and remember an antigen from a pathogen that the body has encountered before and initiate a faster immunological response upon a reencounter with the particular antigen. This dependents on colonial selection.. The memory cells have a long life span and can remain in the body for a long time. When it encounter the antigen its previously encountered for the second time, they mobilize quickly and become plasma cells, these secrets a lot of antibodies and cause a stronger reaction to defend against such antigen in a short time.
Image is not available in the question so, the correct image is attached below.
Answer:
D. codes for a specific trait
Explanation:
chromosome is defined as a DNA molecule found in the nucleus of most living cells which carry genes and transfer the genetic information.
The part labelled b in the image is gene. The function of gene is to code for a specific trait.
Genes are responsible for carrying traits that form the genotype and phenotype of an organism. where genotype shows the differences in genetic formation and phenotype shows observable characters in an individual such as color, height and features.
Hence, the correct option is D.
Answer:
Homologous structures provide evidence for common ancestry analogous structures show that similar selective pressures can produce similar adaptations beneficial features Similarities and differences among biological molecules in the DNA sequence of genes can be used to determine species relatedness
Answer:
C) skin cells.
Explanation:
follow me and give thanks my answer