What is the structure of defense of a sunflower?

1. How does a sunflower defend itself?
2. What are sunflowers structure?
3. What are the body structures that the plants use to protect themselves?
4. What type of defense structure grows on a plants soft stem?
5. What is a behavioral adaptation of a sunflower?
6. How does a sunflower breathe?
7. What makes sunflower structure important?
8. How many pistils does a sunflower have?
9. How mathematics is involved in the petals of sunflower?
10. Can plants defend themselves?
11. What are the structures involved in the sensory and defense systems of plants?
12. What physical structure is the first line of defense for plants?
13. What are two chemical defenses of plants?
14. How do plants protect their seeds?

How does a sunflower defend itself?

Glandular trichomes are generally proposed to function as defenses against or deterrents to herbivory. The contents of sunflower glandular trichomes are produced via specialized metabolic pathways (i.e., cannot rationally be considered as “waste products”) and have demonstrated cytotoxicity [28], [59].

What are sunflowers structure?

The dicot stem structure of the sunflower is comprised of several layers of vessels that deliver moisture and nutrients to the plant through all phases of growth. The bloom of the sunflower is known as a composite flower, comprised of up to 2000 individual disk-and-ray flowers.

What are the body structures that the plants use to protect themselves?

The first line of defense in plants is an intact and impenetrable barrier composed of bark and a waxy cuticle. Both protect plants against herbivores. Other adaptations against herbivores include hard shells, thorns (modified branches), and spines (modified leaves).

What type of defense structure grows on a plants soft stem?

The epidermis is the boundary layer between the stem and the external wall. It is the first line of defence against pathogens and animals that threaten to infect and eat the plant's stem. The epidermis is often made up of cells called collenchyma cells that have excessively thick cell walls on their external side.

What is a behavioral adaptation of a sunflower?

The sunflower is intolerant to shade exposure and needs full sun exposure. It has adapted to this necessity by having a heliotropic head which rotates to follow the sun, hence the name sunflower. The heads of the sunflower are heliotropic, meaning movement of the head in response to the direction of the sun.

How does a sunflower breathe?

Sunflowers do breathe, but not in the same way we do. They breathe through their stems, leaves, buds, and flowers. All these parts of the sunflower have tiny pores on them called stomates, through which they take in carbon dioxide and give out oxygen.

What makes sunflower structure important?

The sunflower, with the scientific name Helianthus annuus, is a very complex flower with many different aspects to its structure. These rough hairs help the sunflower get protected from herbivores as well as sustain its water supply by abridging evaporation of its water. ...

How many pistils does a sunflower have?

Sunflower belongs to the Asteraceae or Compositae family. Disc florets of sunflower have two fused carpels and 5 stamens.

How mathematics is involved in the petals of sunflower?

The pattern of seeds within a sunflower follows the Fibonacci sequence, or 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144...1 If you remember back to math class, each number in the sequence is the sum of the previous two numbers. ... This number is exactly the golden mean.

Can plants defend themselves?

Plants can't run away from danger like most animals can, so they have developed their own weapons and armor in order to protect themselves. ... To deter larger animals some plants have sharp spines or thorns, while others have leaves that sting or are bitter to taste. Cacti spines can be up to 6in (15cm) long.

What are the structures involved in the sensory and defense systems of plants?

Physical barriers like bark and spines protect tender tissues. Plants also have chemical defenses, including toxic secondary metabolites and hormones, which elicit additional defense mechanisms.

What physical structure is the first line of defense for plants?

The first line of defense in plants is an intact and impenetrable barrier composed of bark and a waxy cuticle. Both protect plants against pathogens. A plant's exterior protection can be compromised by mechanical damage, which may provide an entry point for pathogens.

What are two chemical defenses of plants?

Chemical defenses : Formed by chemical compounds stored, like phenolics, terpenoids, and alkaloids, and released under attack. Antinutritive defenses include chemical, toxins, defensive proteins, enzymes, and resin deposits that can flow to repel or physically trap small organisms.

How do plants protect their seeds?

Seeds are protected by a coat. This coat can be thin or thick and hard. ... The seed also contains a short-term food supply called the endosperm which is formed at fertilization but is not part of the embryo. It is used by the embryo to help its growth.