1. scientists believe that ancient ancestors of all animals were (1 point) a) single-celled prokaryotes that reproduced asexually. b) single-celled eukaryotes that sometimes grew in colonies. c) multicellular organisms that were probably autotrophic. d) multicellular organisms with an alternation of generations lifecycle. 2. the cambrian explosion resulted in the evolution of the first (1 point) a) dinosaurs and mammals. b) representatives of most animal phyla. c) bacteria. d) land animals.
Answers: 2
Biology, 21.06.2019 16:10
Alaska and northern canada have a diet rich in vitamin d and their skin color is darker than predicted on the basis of iv intensity at their latitude. explain the observation:
Answers: 1
Biology, 22.06.2019 07:00
Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome
Answers: 2
Biology, 22.06.2019 08:20
10111213141516lactic acid fermentation differs from ethyl alcohol fermentation in thato in ethyl alcohol fermentation co2 is also producedlactic acid fermentation can occur in all living thingsethyl alcohol fermentation can only occur in plantsonly lactic acid fermentation can produce more atp
Answers: 1
Biology, 22.06.2019 09:00
Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm
Answers: 1
1. scientists believe that ancient ancestors of all animals were (1 point) a) single-celled prokaryo...
Computers and Technology, 26.01.2021 09:50
Mathematics, 26.01.2021 09:50
Physics, 26.01.2021 09:50
History, 26.01.2021 09:50
Biology, 26.01.2021 09:50
Mathematics, 26.01.2021 09:50
Mathematics, 26.01.2021 09:50
Business, 26.01.2021 09:50
Social Studies, 26.01.2021 14:00
Computers and Technology, 26.01.2021 14:00