Biology, 01.11.2019 04:31 fredericksppeedddf
You’ve likely heard of polar bears (ursus maritimus) and grizzly bears (ursus arctos horribilis). have you heard of a grolar bear or a pizzly bear? these might be unfamiliar because they are the offspring of matings between polar bears and grizzlies. a handful of these animals have been born in zoos; three have been documented in nature. due to their rarity, only a few grolars (grizzly dad and polar bear mom) or pizzlys (polar bear dad and grizzly mom) have been studied in detail. their fur color, head shape and ear shape (see figures below) are striking intermediates between the phenotypes of their parents. the origin of polar bears was the result of:
a. peripatric speciation.
b. sympatric speciation.
c. allopatric speciation.
Answers: 2
Biology, 22.06.2019 02:50
Factors that can increase mutation rates a. high temps b. low temps c. food additives d. uv rays
Answers: 1
Biology, 22.06.2019 09:00
Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land
Answers: 3
Biology, 22.06.2019 13:10
Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.
Answers: 2
You’ve likely heard of polar bears (ursus maritimus) and grizzly bears (ursus arctos horribilis). ha...
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