Which of the following statements about phagocytic cells in animals is false?
(a) Phagocytic cells are important in the gut to take up large particles of food.
(b) Phagocytic cells scavenge dead and damaged cells and cell debris.
(c) Phagocytic cells can engulf invading microorganisms and deliver them to their lysosomes for destruction.
(d) Phagocytic cells extend pseudopods that surround the material to be ingested.
(a) Although some unicellular eukaryotes ingest food particles by phagocytosis, phagocytosis is not involved in digestion in the animal gut.
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In the female, the ________ secretes both estrogen and progesterone, and if fertilization does not occur, this structure degenerates
Fill in the blank(s) with correct word
When crossing a true-breeding red snapdragon flower with a true-breeding white flower of the same species, all offspring are pink. This would seem to support the pre-Mendel view that inheritance is a blending of parental traits. However, Mendel and conventional wisdom agree that "blending" of parental traits is not correct and that particles of inheritance are actually involved. Which of the following statements supports the idea of particulate inheritance? Select all that apply.A) Two parents that show the incompletely dominant phenotype produce some offspring that are red and some that are white.B) Over many generations of crossing individuals with the incompletely dominant phenotype, all the progeny are pink.C) There is no way to directly prove that incomplete dominance is not a case
of blending.D) In meiosis, alleles of different genes assort independently of each other during gamete formation. What will be an ideal response?
The basis of the immune system is:
a. direct cell to cell contact. b. distinguishing between self and nonself. c. communicating between cells. d. producing antibody action. e. attacking invading objects.
A hemocoel is part of an open circulatory system
Indicate whether the statement is true or false