Can anyone answer me why we send food to everyone else, and we have people without food, clothes,shelter, here living in america?
Can anyone answer me why we send food to everyone else, and we have people without food, clothes,shelter, here living in america?
Scientists hypthesize that in prehistoric times, the impact of an asteroid might have caused a world-wide dust cloud that blocked sunlight and led to the extinction of many species. Why might some species survive such a change on Earth?
A. Natural selection would lead to the extinction of those species that did not depend on sunlight.
B. All species depend on sunlight for life processes and therefore would be affected by a period of darkness.
C. Species that populated the location of the impact would die off, while species located far away would survive.
D. Species that are less dependent on sunlight might survive, while others that rely on sunlight would go extinct.
I already have an answer on my mind. But due to educational purposes i would like to hear your answers and your opinions.
shouldn’t it be B. because ALL SPECIES depend on sunlight. Look at this way. herbivores eat plants. but plants die so herbivores die. if herbivores die then the carnivores will then die too because of nothing too eat. then if carnivores die humans will die next. so shouldnt it be B.
Posted in 2012
Tagged answer, Asteroid, Dust, dust cloud, Earth, extinction, FCKIN, HELP, hypthesize, impact, natural selection, PLEASE, prehistoric times, scientists, selection, sunlight
what is preserving food?why do we need to preserve it?give me a detailed and simple answer.
Tagged answer, food, preserving food, simple answer
1)in what type of medium is the composition known
a. supplemented b. selective c. complex d. defined
2)all life forms are absent
a. sterile b. sanitized c. aseptic d. disinfected
3) an organism growing in a unopened can of vegetables is probably
a. obligate anaerobe b. aerobe c. microaerophile d.facultative anaerobe
4) affects elimination of microbes on objects
a. temperatue b. presence of organic matter c. number of microbes present d.all
5)least effective in killing microbes
a. microwaves b. x-rays c. uv light d. gamma rays
6)not true of hypertonic solutions
a. good for preserving foods b. cause bacterial cells to underggo plasmolysis
c. include brines in syrups d. kill all microbes and endospores
7)all are direct methods to measure growth except
a. direct microscopic count b.filtration c. metabolic activity d. standard plate count
8)Not a disadvantage of plate count method
a. cells may form aggregates b.chemical/physical requirements are determin
Tagged answer, composition, Medium, Micro, type