TD
Tatyana Davis
Answers (6)
TD
Answered
All aspects of a memory are stored together in the brain.
On Jul 24, 2024
False
TD
Answered
Sirenians (manatees and dugongs) are aquatic mammals that, like whales, lack hind limbs. Is lack of hindlimbs a homologous trait for sirenians and cetaceans?
On Jul 21, 2024
No, the lack of hind limbs in sirenians (manatees and dugongs) and cetaceans (whales, dolphins, and porpoises) is not a homologous trait but rather an example of convergent evolution. Homologous traits are characteristics that are shared by species due to common ancestry, whereas convergent evolution refers to the independent evolution of similar features in species of different lineages.
TD
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How is it possible for water to defy gravity and travel from the roots to the tops of plants? Use the tension-cohesion model to explain your answer.
On Jun 23, 2024
Concepts to Consider: Evaporative pull of transpiration extends from leaves to stems and roots, drawing water upward; water is pulled up in an unbroken column due to the cohesive and adhesive properties of water.
TD
Answered
The Trivers-Willard hypothesis primarily attempts to explain
A) variation in the sex ratio of offspring.
B) parent-offspring conflict.
C) siblicide and infanticide.
D) the decline in reproductive output with age.
A) variation in the sex ratio of offspring.
B) parent-offspring conflict.
C) siblicide and infanticide.
D) the decline in reproductive output with age.
On Jun 20, 2024
A
TD
Answered
Which of the following individuals is most likely to be in a negative nitrogen balance?
A) A healthy pregnant woman
B) A 10-year-old child
C) An adult woman with adequate protein intake
D) An elderly homeless man
E) A healthy adult man who exercises
A) A healthy pregnant woman
B) A 10-year-old child
C) An adult woman with adequate protein intake
D) An elderly homeless man
E) A healthy adult man who exercises
On May 24, 2024
D
TD
Answered
Which element is correctly matched with its major function in plants?
A) Phosphorus-alters membrane permeability
B) Sulfur-essential part of chlorophyll
C) Potassium-opens and closes stomata
D) Carbon-maintains turgidity of cells
E) Calcium-involved in nitrogen fixation
A) Phosphorus-alters membrane permeability
B) Sulfur-essential part of chlorophyll
C) Potassium-opens and closes stomata
D) Carbon-maintains turgidity of cells
E) Calcium-involved in nitrogen fixation
On May 21, 2024
C