Answer:
Malignant melanoma cells would have active telomerases that constantly replenish and lengthen telomeres.
Explanation:
Telomerase can be described as enzymes which add the repetitive sequences called telomeres at the end of a chromosome. Telomeres can be described as repetitive sequences at the end of the chromosome which are involved in protecting the chromosome from any damage.
In a normal skin cell, the telomeres will shorten with time. But in a malignant skin cell, the telomerase will add the repetitive sequence again and again. The telomers will not be able to shorten.
Innate: keratinized epithelium
stratified squamous epithelium hypodermal areolar connective tissue antigen presenting cells major histocompatibility complexes complement (antibody -dependent pathway )
Innate or non-specific response is the first defense against invaders. Components of this response include physical (e.g. skin . mucosa) and chemical barriers against pathogens and cells such as Natural Killer cells, macrophages, neutrophils, dendritic cells, mast cells, basophils, eosinophils. Innate response reacts immediately.
Adaptive: immunoglobulin plasma cells agglutinin
helper t cells memory t cells cytotoxic t cells cd4+cells
t lymphocytes
Adaptive immune response or specific response is specific to the pathogen presented and mediated by lymphocytes, B and T cells. Adaptive immune response creates immunological memory after the first, initial l response to a specific pathogen which leads to enhanced response.
Answer:
C. Initially, the mouse and human proteins were confined to their own halves of the newly formed hybrid cell, but over time, the two sets of proteins became evenly intermixed over the entire cell surface. This suggests that proteins, like lipids, can move freely within the plane of the bilayer.
Explanation:
Due to the fact that a membrane is a two-dimensional fluid, a lot of its proteins, as it is seem in lipids, can flow without obstruction in the plane of the bilayer. This lateral diffusion was at first illustrated by analysing the fusion of a mouse cell to a human cell to produce a big, hybrid cell and then follow up the dispersion of specific mouse and human plasma membrane proteins. In the start up, the mouse and human proteins are restricted to their respective halves of the just produced hybrid cell, but in the space of half an hour or so, the two groups of proteins are noticed to be equally combined over the whole cell surface.
Answer:
The population of white-tailed deer in the two habitats.
Explanation:
Population is defined as the number of individuals per unit area. The unit area can be per hectare, acre, meter square, square mile, or any other acceptable unit for measuring the area of land.
<em>The ecologists identified two different woodlots and counted the population of white-tailed deer in the two. He must have been interested in comparing the population of the animals in the two habitats.</em>
Answer:
1/2
Explanation:
Mendel's law of segregation states that pair of alleles representing a gene segregate during gamete formation and randomly unite during fertilization.
<em>Hence, a gene represented by Rr alleles will segregate into R and r gametes. Out of the two gametes, one will carry R allele while the other one will carry r allele. The probability that a gamete will carry an r allele therefore is 1/2.</em>
