2. How does the immune system produce so many different antibodies?
(A) vertebrates inherit millions of different antibody genes
(B) each antibody is the product of several different genes that are shuffled to produce new combinations
(C) meiotic recombination and independent assortment lead to antibody variations
(D) the immune system creates new B cells each time it is exposed to a new antigen
(E) all of the above

複選題48 View the Exhibit. Assume the product attribute does NOT yet exist in any scope. Which two create an instance of com.example.Product and initialize the name and price properties to the name and price request parameters? (Choose two) (A) ＜jsp:useBean id="product" class="com.example.Product" /＞＜jsp:setProperty name="product" property="*" /＞ (B) ＜jsp:useBean id="product" class="com.example.Product" /＞＜% product.setName( request.getParameter( "name" ) ); %＞＜% product.setPrice( request.getParameter( "price" ) ); %＞ (C) ＜jsp:useBean id="product" class="com.example.Product" /＞＜jsp:setProperty name="product" property="name"value="${param.name}" /＞＜jsp:setProperty name="product" property="price"value="${param.price}" /＞ IT Certification Guaranteed, The Easy Way! (D) ＜jsp:useBean id="product" class="com.example.Product"＞＜jsp:setProperty name="product" property="name"value="${name}" /＞＜jsp:setProperty name="product" property="price"value="${price}" /＞＜/jsp:useBean＞

49 A web component accesses a local EJB session bean with a component interface of com.example.Account with a home interface of com.example.AccountHome and a JNDI reference of ejb/Account. Which makes the local EJB component accessible to the web components in the web application deployment descriptor? (A) Option A (B) Option B IT Certification Guaranteed, The Easy Way! (C) Option C (D) Option D

50. Servlet A forwarded a request to servlet B using the forward method of RequestDispatcher. What attribute in B's request object contains the URI of the original request received by servlet A? (A) REQUEST_URI (B) javax.servlet.forward.request_uri (C) javax.servlet.forward.REQUEST_URI (D) javax.servlet.request_dispatcher.request_uri (E) javax.servlet.request_dispatcher.REQUEST_URI

1. Imagine a tree is attacked by fungus that parasitizes and destroys phloem. What would be a likely cause of the tree’s death? (A) inability to capture water from the soil (B) inability to transport water to the leaves (C) starvation of the roots (D) inhibition of photosynthesis (E) A and B

3. Which of the following is true for both prokaiyotic and eukaryotic gene expression? (A) after transcription, a 3,poly-A tail and a 5，cap are added to mRNA (B) transcription of mRNA can begin before transcription is completed (C) RNA polymerase may recognize a promoter region upstream from the gene (D)mRN'A is synthesized in the 3direction (E) the mRNA transcript is the exact complement of the gene from which it was copied

4. During cellular respiration., pyruvate must be transported across (A) the cell membrane into intercellular space (B) both mitochondria membranes into the matrix (C) the outer mitochondria membrane into the stroma (D) the outer mitochondria membrane into the cytosol (E) the nuclear envelop into nucleus

5. "Which of the following statements about nonspecific defenses is false? (A) they include inflammatory responses (B) they include physical and chemical barriers (C) they must be primed by the presence of antigen (D) they may involve the formation of membrane attack complexes (E) marcophages and natural killer cells are participants in the process

6. Mitochondria and chloroplasts have double membranes because (A) their DNA is light-sensitive (B) they need protection from lysosomes (C) they are derived from eukaryotes (D) the double membrane is required to maintain a hydrogen ion gradient (E) they originated from endosymbiosis

7. A flower without sepals and petals is most likely pollinated by (A) bees (B) moths (C) bats (D) wind (E) insects

8. A species concept defined by phenotypic characters is referred as (A) biological species concept (B) ecological species concept (C) evolutionary species concept (D) morphological species concept (E) recognition species concept