Answers: 2
Biology, 22.06.2019 10:00
Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?
Answers: 2
Biology, 22.06.2019 12:40
Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.
Answers: 1
Biology, 22.06.2019 18:30
The hypothesis that evolution occurs at an irregular rate through geologic time is known as: directional evolution directional equilibrium punctuated equilibrium punctuated evolution
Answers: 1
Which is the role of respiration in the carbon cycle?...
Mathematics, 29.12.2020 22:40
Mathematics, 29.12.2020 22:40
Mathematics, 29.12.2020 22:40
Mathematics, 29.12.2020 22:40
Mathematics, 29.12.2020 22:40
Mathematics, 29.12.2020 22:40
Mathematics, 29.12.2020 22:40
Computers and Technology, 29.12.2020 22:40
English, 29.12.2020 22:40
Mathematics, 29.12.2020 22:40
History, 29.12.2020 22:40