Which of the following are characteristics of reptiles?
A. They have lungs and smooth skin.
B. They have a skeleton composed of cartilage and are ectotherms.
C. They have lungs and a skeleton composed of cartilage.
D. They are ectotherms and have smooth skin.
E. They have lungs and are ectotherms.
E. They have lungs and are ectotherms.
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This sequence of questions is designed to help students think about the relationship between photosynthesis and respiration and the impact of these biochemical processes, as well as the impact of human activities and geological occurrences,
on the balance of CO2 in the atmosphere. Reference: Ref 25-1 Photosynthesis [introduces / removes] CO2 from the atmosphere while respiration [introduces / removes] CO2 from the atmosphere. What will be an ideal response?
Members of the plant family Cactaceae (cacti) are native to the Americas and thrive in dry environments. They have a number of specialized adaptations, including reduced leaves, succulent (fleshy) stems for water storage, and spines for defense against herbivores. Some members of the family Euphorbiaceae are native to the African desert and resemble cacti, having similarly reduced leaves, succulent stems, and thorns. Other species in the Euphorbeaceae do not have these traits. Based on this information, what can you say about the morphological traits of Cactaceae and Euphorbiaceae indicated above?
A. They are shared primitive traits. B. They are shared derived traits. C. They are homologous traits. D. They are analogous traits.
Why is back pain so common in humans? What will be an ideal response?
Which excretory organs are found in insects?
A. nephridia B. protonephridia C. Malpighian tubules D. nephron