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What is the proper organ sequence as an earthworm processes nutrients during digestion?
b. Mouth → esophagus → gizzard → crop → intestines → anus
d. Mouth → gizzard → crop → esophagus → intestines → anus
a. Mouth → esophagus → crop → gizzard → intestines → anus
c. Mouth → crop → esophagus → gizzard → intestines → anus
What are the two organ systems found in plants? *
b. Roots and stems
c. Roots and shoots
d. Stems and flowers
a. Leaves and flowers
Collenchyma are characterized by the presence of? *
a. elongated cells with deposits of cellulose and pectin all over the wall
d. isodiametric cells with thickening all over the cell
b. isodiametric cells with deposits of cellulose and pectin corners
c. elongated cells with thickening at the corners
Which of the following systems does the respiratory system depend on to function? *
a. Cardiovascular
c. urinary
d. digestive
b. Shoot
Which is the correct sequence of increasing organization? *
d. Organ, organism, tissue, cell
c. Atom, molecule, tissue, cell
b. Organelle, tissue, cell, organ
e. Cell, tissue, organ, organ system
a. Molecule, cell, organelle, organ
Skin, horns, hair, sweat glands and quills are all part of what organ system?*
a. nervous
b. respiratory
c. integumentary
d. digestive
How are root hair cells adapted to maximize water absorption? *
a. They have a large surface area
b. They have a small surface area
d. the guard cells become turgid.
c. They have a fully permeable membrane
An organ system is a _____. *
a. group of organs that work together to complete a set of functions
e. large cells that work together inside of an organism
d. a group of tissues that perform the same function
b. a group of organisms that work together to make a bigger organism
c. a group of tissues that perform the same function
Flowering plants have a root system that supplies _____ to the _____ system for it to complete photosynthesis. *
d. water, stem and leaf
a. water, shoot
c. carbon dioxide, stem
b. sunlight, shoot
A plant leaf is an organ. In what way is a human lung similar to a plant leaf? *
b. Both organs are made up of only one kind of cell.
a. Both organs make chemical energy.
d. Both organs exchange oxygen and carbon dioxide.
c. Both organs are made up of protective dermal tissue.
Plants contain xylem and phloem tissue. What organ system in animals performs a similar function as the xylem and phloem of plants? *
d. circulatory system
a. digestive system
b. excretory system
c. respiratory system
Which of these is a function of transpiration? *
c. To cool the leaves by evaporation
a. To carry sugar to the roots for storage as starch
d. To test the distance nutrients travel and water lost
b. to carry sucrose to the growing shoots
what are advantages and disadvantages to sexual reproduction
A) A cross was made between pure breeding plants differing in two
characters (colour and shape of seed) and the progenies were inter-crossed
to produce F2 population. Four types of phenotypes; yellow round (1108),
yellow wrinkled (382), green round (366) and green wrinkled (140) were
observed in F2. Use the chi-square test to determine if these results are
due to independent assortment.
B) Explain prophase and metaphase stages of mitosis
1.What is the stimulus in the feedback loop below?
2.What is the control center in the feedback loop below?
3.Mention 2 effector organs that process so that the body could return to a set point?
When body temperature drops, the hypothalamus initiates several physiological responses to increase heat production and conserve heat: Narrowing of surface blood vessels (vasoconstriction) decreases the flow of heat to the skin; shivering commences, increasing production of heat by the muscles; Adrenal glands secrete stimulatory hormones such as norepinephrine and epinephrine to increase metabolic rates and hence heat production. These effects cause body temperature to increase. When it returns to normal, the hypothalamus is no longer stimulated, and these effects cease.
(feedback mechanism)
(feedback mechanism)
1.) What organ is the probable control center in the feedback loop below?
2.) What is the stimulus in the feedback loop below?
3.) Enumerate the 2 effector organs that process so that the body could return to a set point?
When the high blood glucose level is detected, the beta cells in the pancreas are stimulated to increase the production of insulin. These hormones are released into the bloodstream which will allow body cells to take up more glucose. Liver will be stimulated to take up glucose and store it as glycogen. These responses will allow blood glucose to decline to a set point thereby diminishing the stimulus to release insulin.
What is the stimulus in the feedback loop?
When the high blood glucose level is detected, the beta cells in the pancreas are stimulated to increase the production of insulin. These hormones are released into the bloodstream which will allow body cells to take up more glucose. Liver will be stimulated to take up glucose and store it as glycogen. These responses will allow blood glucose to decline to a set point thereby diminishing the stimulus to release insulin.
(lesson: feedback mechanism)
1. A pseudocoelom is found in the following phylum
A) Cnidaria
B) Echinodermata
C) Annelida
D) Platyhelminthes
Nematoda
#339914 on Dec 2023