Taproot water table
While many desert plants have fibrous roots near the surface, creosote bushes have deep
from their roots that kill any pacing and establishing plants—even creosote seedlings.
pattern, with nearly equal spacing between each plant. Older creosote bushes release toxins
Which statement describes the most likely reason that creosote bushes release toxins that
harm other plants?
A. Toxins increase the need for pollinators and decrease the bushes' ability to reproduce.
B.
Toxins increase the bushes' ability to grow taller and increase their ability to reproduce.
Toxins decrease competition from neighboring plants and increase the bushes' ability to
reproduce.
D. Toxins decrease the bushes' ability to photosynthesize and decrease their ability to
reproduce.
C.

The tasmanian devil, a marsupial carnivore, is facing extinction due to devil facial tumor disease (dftd) which causes bulging cancerous lumps and lesions to erupt around the face and neck — often causing enough deformation to make seeing or eating difficult. dftd has evolved into a contagious cancer, a trait that is unique among cancers. devil mating behavior involves biting around the head and neck, allowing cells from one individual — especially cells from the crumbly dftd tumors — to be transferred to the wounds or face of a new individual. this marsupial was once found across australia, but sea levels rose, isolating the tasmanian population, while the australian population went extinct. what would be an outcome of genetic isolation that is likely to have impacted the spread of dftd? a) reduced territory puts diseased individuals in greater contact with non-diseased ones. b) inbreeding results in less variation in facial features so the cancer is generally fatal. c) genetic isolation has made it difficult for scientists to develop a vaccine against dftd. d) the lack of genetic variation in the immune system of tasmanian devils minimizes resistance to the disease.

What did not occur in the proterozoic eon a)the oxygen levels increase greatly in the atmosphere,b)the emergence of the eukarya , c)muti cella’s eukaryotic organisms began to diversify,d)anaerobic bacteria kept thriving with more oxygen

Jason, a dog breeder, decides to mate a poodle with a golden labrador retriever. he wants to get puppies with the curly hair of the poodle and the color of the labrador. what concept is shown in this example? question 6 options: artificial selection adaptation evolution natural selection