BS Biology 1: Sunflower Classification

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Questions and Answers

What is a defining characteristic of dicots?

Their flowers are always red.

They typically have one cotyledon.

They do not produce seeds.

Their leaves have a net-like vein pattern. (correct)

Which order is known for its composite flower heads?

Asterales (correct)

Orchidales

Rosales

Lamiaceae

What is the scientific name of the sunflower?

Helianthus tuberosus

Helianthus dioicus

Helianthus maximilianii

Helianthus annuus (correct)

What role do sunflowers play in the ecosystem?

They produce oxygen and are a food source. Signup and view all the answers

What is the arrangement of flowers in the Asteraceae family?

Flower heads made of many small florets. Signup and view all the answers

Which of the following features is characteristic of plants?

They have chloroplasts and carry out photosynthesis. Signup and view all the answers

What is unique about the flower head of sunflowers?

It is made up of many small florets grouped together. Signup and view all the answers

What distinguishes angiosperms from other plants?

They have distinct reproductive structures known as flowers. Signup and view all the answers

What type of venation do dicots typically exhibit?

Reticulate venation. Signup and view all the answers

What is a fundamental characteristic of flowering plants?

They produce seeds enclosed within a fruit. Signup and view all the answers

What is the involucre in relation to sunflowers?

A whorl of bracts at the base of the flower head. Signup and view all the answers

Which feature is common among plants in the tribe that includes sunflowers?

They exhibit unique morphological and genetic characteristics. Signup and view all the answers

Which part of the sunflower flower is specifically designed to attract pollinators?

The bright yellow petals Signup and view all the answers

Which of the following classes do sunflowers belong to?

Magnoliopsida Signup and view all the answers

What type of organisms are sunflowers classified as?

Autotrophic organisms Signup and view all the answers

What common trait is shared by sunflowers in the Helianthus genus?

Heliotropic behavior Signup and view all the answers

Which is NOT a characteristic feature of sunflowers?

Being an aquatic plant species Signup and view all the answers

Which characteristic distinguishes Helianthus annuus from other Helianthus species?

Large, single flower heads Signup and view all the answers

What is a primary aspect of the sunflower's morphology?

Structure of the flower head Signup and view all the answers

What type of stems do sunflowers in the Helianthus genus typically have?

Tall and erect stems Signup and view all the answers

Which of the following is NOT a common characteristic of sunflowers in the Helianthus genus?

Growth in wetland areas Signup and view all the answers

What color are the ray florets of Helianthus annuus?

Bright yellow Signup and view all the answers

What type of genetic composition is unique to Helianthus annuus?

Specific genetic markers Signup and view all the answers

What ecological niche does Helianthus annuus typically occupy?

Open fields and gardens Signup and view all the answers

Study Notes

BS Biology 1 Study Notes

Members: Ignacio, Carmel Grace, Carlos, Wendy, Garcia, Ken Hofer
Group Number: 13
Date: November 12, 2024
CN: 0503
Subject: Sunflower (scientific name: Helianthus annuus)

Classification of Sunflower

Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Asterales
Family: Asteraceae
Tribe: Heliantheae
Genus: Helianthus
Species: Helianthus annuus

Sunflower Characteristics

Autotrophic and Sessile: Sunflowers are autotrophic organisms, meaning they make their own food through photosynthesis. They are mostly sessile, meaning they don't move.
Ecosystem Role: They play a vital role in ecosystems by producing oxygen and forming the base of the food chain.
Flower Structure: The sunflower has a composite flower head, made of many small florets. This is a defining characteristic of the Asteraceae family.
Reproductive Structures: Sunflowers have true flowers with distinct reproductive structures enabling sexual reproduction.
Pollination: Their bright yellow flowers attract pollinators, which facilitate the sexual reproduction process.
Fruit Development: The seeds develop within the structure of the flower, which turns into a fruit that encloses seeds.
Dicotyledonous: Sunflowers are dicots, typically having two cotyledons in their seeds, and often featuring net-veined leaves in their anatomy.
Inflorescence: They have a characteristic disk and ray floret arrangement, which is a type of inflorescence typical of the Asteraceae family.
Heliantheae Characteristics: Features related to florets, growth forms, and morphological aspects group sunflowers with other members of the Heliantheae tribe.
Helianthus Traits: Shared common traits like overall plant appearance (tall and erect stems), flower head structure, and various aspects of growth and reproduction distinguish species in the Helianthus genus.
Heliotropic Behavior: The sunflower follows the sun's path throughout the day, a behavior called heliotropism.

Significance of Sunflower Study

Classification Hierarchy: Understanding the taxonomic classification (kingdom, phylum, etc.) clarifies the sunflower's place in the plant kingdom.
Key Plant Characteristics: The study highlights fundamental characteristics of flowering plants, like the presence of flowers for sexual reproduction and the role of pollinators.
Developmental Stages: Details about the flower structure, embryo development, and reproduction process are presented.

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Description

Explore the fascinating classification and characteristics of the sunflower, scientifically known as Helianthus annuus. This quiz covers its taxonomy, ecosystem roles, and unique structural features. Perfect for students studying plant biology and botany.