Which of the following plants are given credit for being the first plants to live on land?
a) liverworts
b) Cooksonia
c) club mosses
d) Gnetum
e) whisk ferns
Answer: a) liverworts
You might also like to view...
The lock-and-key fit of the genitalia of many male and female insects of the same species is an important part of ensuring reproductive success. Which of the following statements provides an explanation for the fit and shape of insect genitalia?
A. In order to achieve high reproductive success males choose to have genitalia that fit only into the reproductive tracts of females from different species so that they can start new species. B. In order to be successful on land and ensure fertilization, males choose genitalia that only fit into female genitalia of the same species. C. Success in terrestrial environments was increased because sperm were deposited within a female of the same species and increased the probability of fertilization. D. Success in terrestrial environments was increased because males who deposited sperm within females helped to ensure survival of the species once they had colonized land.
Asbestos is a material that was once used extensively in construction. One risk from working in a building that contains asbestos is the development of asbestosis caused by the inhalation of asbestos fibers. Cells will phagocytize asbestos, but are not able to degrade it. As a result, asbestos fibers accumulate in _____.
A) mitochondria B) ribosomes C) peroxisomes D) lysosomes
What is the most common bacterial cause ofconjunctivitis?
a) Neisseria gonorrhoeae b) Chlamydia trachomatis c) Haemophilus influenzae d) Streptococcus pyogenes
Dark Field Microscopy
A. uses light beams that are deflected by a different thickness of the object and are reflected when they strike the objective B. is used to observe viruses and the internal structure of thinly sectioned cells C. is used to observe a specimen that emits light when illuminated with an ultraviolet light D. is used primarily to view spirochetes