Biology Lab: Flower Dissection Grading Rubric

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Questions and Answers

What do osmoreceptors in the brain detect?

Changes in body temperature

Changes in heart rate

Changes in blood pressure

Changes in the total solute concentration of the blood (correct)

What type of receptors do sharks have in their snouts?

Photoreceptors

Mechanoreceptors

Thermoreceptors

Electroreceptors (correct)

What is the function of the semicircular canals in the human ear?

To maintain balance (correct)

To process sound pressure

To detect light

To regulate body temperature

What is the main function of photoreceptors?

To detect energy in the form of light Signup and view all the answers

What is the role of the Eustachian tube or auditory tube?

To connect the ear to the pharynx and maintain equal air pressure Signup and view all the answers

What is the combination of senses that makes sharks highly efficient predators?

Electroreception, sense of smell, and lateral line system Signup and view all the answers

What percentage of all plant species are angiosperms?

90% Signup and view all the answers

What is the primary advantage of flower reproduction in plants?

Increased seed dispersal Signup and view all the answers

Which part of a plant's root prevents the passage of water and solute particles via the apoplast route?

Casparian strip Signup and view all the answers

Why are tomatoes and squash classified as fruits?

Because they are derived from the ovary of a flower Signup and view all the answers

What is the main function of plant cells regulating the intake of nutrients from other cells?

To regulate the intake of nutrients from other cells Signup and view all the answers

What is the primary difference between an epiphytic and a parasitic plant?

Their dependence on other plants Signup and view all the answers

What would you expect to observe in plants grown in the absence of light?

Yellow leaves and short internodes Signup and view all the answers

What is the primary purpose of a flower dissection?

To study the reproductive cycle of a plant Signup and view all the answers

Which plant organs are responsible for photosynthesis?

Leaves Signup and view all the answers

What is the effect of the 10^-8 molar solution of IAA on the growth of oat shoots and roots?

It stimulates growth in shoots and inhibits growth in roots Signup and view all the answers

What is a characteristic of a student's work that demonstrates 'evident pre-collegiate surgical skills'?

Good motor skills Signup and view all the answers

How many points are possible for the execution of dissection in the grading rubric?

15 Signup and view all the answers

What is the characteristic feature of the rafflesia, the world's largest single flower?

Its strong, unpleasant odor Signup and view all the answers

Which of the following statements about meristems is true?

They are absent from animals and provide cells for increase in diameter of stems Signup and view all the answers

What is a practical application of the plant growth substance IAA?

As a rooting powder to promote root growth Signup and view all the answers

What is the average diameter of the rafflesia, the world's largest single flower?

1 meter Signup and view all the answers

What is a function of auxin (IAA) in plant growth?

To stimulate growth in stems and roots Signup and view all the answers

What is the characteristic feature of eudicot plants in terms of their leaves?

They have leaves with multiple veins Signup and view all the answers

What is the function of a hydrostatic skeleton?

To provide support for muscle action and cushioning of body parts from shocks Signup and view all the answers

What is characteristic of the phylum Arthropoda?

Having an exoskeleton Signup and view all the answers

What is the function of the knobs and plates on the inner surfaces of an exoskeleton?

To provide a surface for muscle attachment Signup and view all the answers

Why does an arthropod need to molt?

To allow for growth by replacing the exoskeleton with a larger one Signup and view all the answers

How many times do most insects shed their exoskeleton before reaching adulthood?

What is the main component of an exoskeleton?

Proteins and chitin Signup and view all the answers

Study Notes

Sensory Detection and Functions

Osmoreceptors in the brain detect changes in osmotic pressure and help regulate fluid balance in the body.
Sharks possess electroreceptors in their snouts, specifically called Ampullae of Lorenzini, which detect electric fields generated by living organisms.
Semicircular canals in the human ear are responsible for detecting rotational movements and maintaining balance.
Photoreceptors in the eyes detect light and convert it into neural signals for vision.

Eustachian Tube and Sensory Efficiency

The Eustachian tube equalizes pressure between the middle ear and the atmosphere, aiding in hearing function.
Sharks combine their acute sense of smell, electroreception, and sensitive lateral line systems, making them highly efficient predators.

Plant Biology

Approximately 80% of all plant species are angiosperms, characterized by flowering and seed production.
The primary advantage of flower reproduction is the attraction of pollinators, enhancing fertilization and genetic diversity.
The endodermis in a plant's root acts as a barrier, preventing the apoplast route for water and solute particles.
Tomatoes and squash are classified as fruits because they develop from the ovary of a flower and contain seeds.

Plant Nutrient Regulation and Growth

Plant cells regulate nutrient intake through selective permeability, facilitating water and mineral uptake.
The primary difference between epiphytic and parasitic plants is survival mode; epiphytes grow on other plants without harming them, while parasites derive nutrients at the host's expense.
Plants grown in the absence of light tend to exhibit etiolation, characterized by elongated stems and pale leaves due to the inability to photosynthesize.

Botanical Structures and IAA

Flower dissection allows for the study of floral structures, pollination mechanisms, and reproductive processes.
Leaves and stems are the primary organs responsible for photosynthesis in plants.
A 10^-8 molar solution of IAA (indole-3-acetic acid) stimulates the growth of oat shoots by promoting elongation and root growth through cell division.

Surgical Skills and Dissection

Evident pre-collegiate surgical skills incorporate precision and understanding of anatomical structures.
Execution of dissection in grading rubrics typically allows for up to 25 points, assessing technique and accuracy.

Unique Plant Features

The rafflesia, noted as the world’s largest single flower, can measure up to 3 feet in diameter, featuring a characteristic odor resembling rotting flesh for attracting pollinators.
True statements about meristems include their role in plant growth and regeneration, as they are regions of active cell division.
Practical applications of IAA include promoting root development and enhancing plant growth in agricultural practices.

Invertebrate and Arthropod Features

A hydrostatic skeleton functions through fluid pressure within a body cavity, providing support and shape to soft-bodied animals.
The phylum Arthropoda is characterized by exoskeletons, segmented bodies, and jointed appendages.
Knobs and plates on the inner surfaces of an exoskeleton reinforce structure and provide areas for muscle attachment.
Arthropods must molt to allow growth, as their exoskeletons do not expand.
Most insects typically shed their exoskeleton around five to six times before reaching adulthood.
Chitin is the main component of an exoskeleton, providing rigidity and protection.

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Description

Assess your flower dissection skills with this grading rubric. Evaluate your execution, task completion, and content communication to improve your biology lab skills.