Answer:
The correct answer is e. dermis
Explanation:
Lymph capillaries are thin walled capillaries interwoven with blood capillaries and found throughout the body except nervous system, bone marrow, and tissues that do not contain vascular tissue like epidermis.
The role of lymphatic capillaries is to collect the extra fluid which is secreted by the tissues in the intercellular spaces. This fluid is called lymph and is clear and transparent and contains WBCs and plasma.
Lymph is different from blood because it do not contain RBCs and platelets. Lymphatic vessels are important part of body immunity because it contains many WBCs in their lymph helpful in fighting diseases.
Answer:
Only the extracts from heat-killed cells treated with RNase are unable to transform nonvirulent bacteria into virulent bacteria.
Explanation:
The experiment by Avery, McCarty and MacLeod aimed to identify Griffith's "transforming principle," which is a principle that explains how transformation is a way of recombining, exchanging, or transferring genetic information between organisms or from one organism to another. For this, they used cell that were heat inactivated and purified the transforming principle of these cells.
The purified cells did not give positive results in the tests done by the scientists, but they presented transformants very similar to the DNA. However, Avery suspected that the result should be reinterpreted and that the molecule was not a DNA. This is because RNA degrading enzymes had no effect on the transforming principle and only RNase-treated heat-killed cell extracts are unable to transform non-virulent bacteria into virulent bacteria.
Answer:
surface of an epithelial cell
Explanation:
