Biology, 29.06.2019 01:30 Frankie103947
The moth species biston betularia has two color morphs, or variants. one has a speckled white and black color, while the other is all black. in the early 1800s in england, the distribution was 10,000 speckled morphs to 1 black morph. that distribution changed dramatically between 1900 and 1950. by 1950, the distribution of the speckled morph had declined to less than 3% of the population and the black morph distribution increased to 97%. which statement most likely explains this change? a. a predator of the moth underwent steep decline, which reduced selective pressures on the moth. b. a chance mutation occurred in one black individual, which gave an advantage to the black morph's ability to survive. c. the changes are due to normal random fluctuations that might be observed in any population over time. d. changes in the environment changed each morph's ability to evade predation in different ways.
Answers: 1
Biology, 21.06.2019 22:30
Witch type of microscope is used to view very small cell components like proteins and dna?
Answers: 2
Biology, 22.06.2019 04:00
What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.
Answers: 3
Biology, 22.06.2019 06:00
What is the statement plant growth is affected by the color light
Answers: 2
The moth species biston betularia has two color morphs, or variants. one has a speckled white and bl...
Computers and Technology, 20.11.2020 14:00
Chemistry, 20.11.2020 14:00
Mathematics, 20.11.2020 14:00