The two main biological activities in the Ca and Si cycles are the biosynthesis of shells and exoskeletal material as well as the mineralization of these materials in sediments
Indicate whether the statement is true or false.
Answer: TRUE
You might also like to view...
Today, the fossil record
A. can be dated only with one layer in relation to older layers below and younger layers above, no actual dates can be estimated. B. can be dated reasonably well only with uranium-238. C. can be dated reasonably well using a variety of radioactive isotopes with known half-lives. D. can be dated precisely, to within a single year, using radioactive isotopes. E. can be dated precisely, to within a single year, using DNA hybridization.
Hpv
A. can integrate into the host's chromosome. B. may be split into cancer-associated and wart-causing types. C. infections always lead to cancer. D. cannot infect newborns at birth. E. can integrate into the host's chromosome AND may be split into cancer-associated and wart-causing types
Which of the following is not a function of the cell membrane?
A) It provides mechanical strength to the cell. B) It gives shape to the cell. C) It regulates passage of molecules into and out of the cell. D) It is largely responsible for cellular homeostasis. E) Serves as a site for protein synthesis.
All of the following are causative agents of conjunctivitis EXCEPT
A) Chlamydia trachomatis. B) herpes simplex. C) adenovirus. D) Neisseria gonorrhoeae. E) Haemophilus influenzae.