When top-down control occurs within an intertidal zone along the rocky coastline of the Pacific Ocean, which of the following species controls the abundance of other species?
A) kelp
B) mussels
C) barnacles
D) starfish
D
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Imperfect conditions in flowers refer to which of the following?
A. how the flower shape looks B. whether there are missing parts such as petals C. where the flower grows D. how often the flower blooms E. whether sexual parts are missing
Answer the following statements true (T) or false (F)
1. Arginine vasotocin is found in nonmammalian vertebrates and shares structural and functional properties with antidiuretic hormone and oxytocin. Because of this, it is generally thought that arginine vasotocin was the ancestoral posterior pituitary hormone in vertebrates. 2. Vitamin D is a hormone produced in part by exposure to sunlight. 3. If blood sodium levels rise sharply above normal limits the heart will release more atrial natriuretic peptide. 4. Juvenile hormone is a critical growth regulatory and maturity hormone in people. 5. A growth-hormone releasing hormone tumor in the brain could lead to stunted growth in children.
Answer the question using the accompanying figure. What is occurring in step 6?
a. fission b. fusion c. fertilization d. the first meiotic division e. the second meiotic division
Describe the life cycles of animals, plants/some fungi, and other fungi/algae with respect to the amount
of time each type of organism spends in their haploid and diploid phases. Also indicate whether those haploid and diploid phases are unicellular or multicellular.
What will be an ideal response?