1. What is the most fundamental basis for animal behavior?
a. neurotransmitter
b. hormones...
1. What is the most fundamental basis for animal behavior?
a. neurotransmitter
b. hormones
c. activation or deactivation of neural pathways
d. genetics
2. which of the following is an adaptation for bipedalism?
a. foramen magnum located at the back of the skull
b. valgus angles at the knee
c. opposable big toe
d. prehensile tail
3. Land animals possess a variety of adaptations that minimize water loss during extraction. whichh of the following is not an example of such an adaption?
a. amphibians have kidneys similar in structure and function to those of marine fish
b. bird and mammals have a high osmotic concentration of urine compared to blood
c. the excretory system of reptiles in dry environments empty into the cloaca
d. marine reptiles excrete salt from glands near their eyes.
4. Which of the following is not a character unique to higher chordates?
a. amniotic eggs
b. notochord
c. jaws and paired appendages
d. endothermy
Please help a girl out
Answers: 2
Biology, 21.06.2019 19:30
Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.
Answers: 2
Biology, 21.06.2019 19:40
Astudent drew the following flowchart to show the movement of nutrients. soil → roots → plants →? where does nitrogen go next? a. directly into nearby animals as nutrition b. directly into aquifers through condensation c. directly into the air through evaporation d. directly into nearby plants during fixation
Answers: 1
Biology, 22.06.2019 02:00
For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system
Answers: 2
Biology, 22.06.2019 05:00
What organ systems are working to you cool down after a workout?
Answers: 1
Mathematics, 09.06.2020 23:57
English, 09.06.2020 23:57
Mathematics, 09.06.2020 23:57