Cactus spines are modified.

1.) Leaves
2.) Stems
3.) Branches

Answers

Answer 1

Answer:

Answer: The correct answer is 1) leaves.

Cactus is a desert plant that possesses thick, enlarged, and leafless stems that are covered with sharp spines or spikes. These sharp cactus spines are the modified leaves that provide them an extra advantage for surviving in desert.

Cactus spines provide protection against predator (as they are very sharp) and prevent the loss of water by reducing the flow of air near the cactus and giving them some shade.

Answer 2

Answer: Cactus spines are modified 1) LEAVES.

Cactus spines occur in clusters in the axil of leaves. Cactus spines are also known as modified bud scales, which also are modified leaves. The spine primordia is produced at the base of the axillary bud's shoot apical meristem; the location where leaf primordia also grows.

Though cactus spines are modified leaves, they do not contain any of the cells or tissues characteristics of leaves when they mature. Cactus spines consist of just a core of fibers surrounded by sclereid-like epidermis cells. When the spines mature, all the cells in the spines are dead. The only living cells are found at the base of the cactus which enables the spine to continue growing.

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List the four basic principles of genetics that Mendel discovered in his experiments. Briefly describe each of these principles.

Answers

1. Fundamental theory of heredity - Mendel discovered that traits (dominant or recessive) cannot be blended. They remain to be distinct as they are passed on to future offspring. Inheritance of such traits involves the passing of certain "inheritance units", which we now call genes or alleles.

2. Principle of segregation - Mendel said that the inheritance units of a species are separated into reproductive cells through meiosis. When fertilization occurs, the alleles reunite, but now come from two parent sources.

3. Principle of independent assortment- parents with more than one trait do not always produce offspring that have matching traits. Traits are passed on independently to subsequent generations.

4. Dominance - dominant traits have better chances of appearing on the offspring's phenotype

Heart passageway to the arteries??answers?

arota

pulse

valve

ventricle

atrium

Answers

arota is the heart passageway ti the arteries

Answer:

ventricle i believe

Explanation:

Ody 2021

Which best describes the importance of mitosis to living organisms?

Answers

Answer:

The correct answer is - growth and development.

Explanation:

Mitosis is one of the cell division cycles that occurs in the somatic cells. It is characterized by producing the two daughter cells by dividing one parent cell which is an exact copy and the same number of chromosomes.

The major importance of mitosis in the life cycle of an organism is growth and development by producing more cells and rapid in numbers. The cells divide in the mitosis for the major purpose of tissue repair and growth of organisms.

Thus, the correct answer is - growth and development.

Mitosis can help by reproducing that living organism quickly and by multiple times.

The faction of Islam controlled the Ottoman Empire and the faction controlled the Safavid Dynasty.

Answers

The Safavid Ottoman war occurred in 1532-1555 and was caused by the territorial dispute of the Ottoman Emperor Suleyman the Magnificent and the Persian Safavid Empire during the reign of Tahmasp I who ordered to kill the governor of Baghdad that was a sympathizer of Soliman.

The attacks were made in three campaigns:

1. Campaign of the Two Iraqs 1532-1534 where the Ottomans successfully attacked the Safavid Iraq.2. Campaign from 1548 to 1549 where an alliance between King Franco and Soliman I was made to conquer Armenia.
3. Campaign 1553-1555, in this campaign against the Shah he lost and recovered Erzum, and kept Baghdad and Lower Mesopotamia.

Suleyman the Magnificient is who expanded the ottoman empire into the Middle East. He also moves further into Europe and besieged Vienna in 1529. Develops Navy and drives Ottoman Empire at the peak of its power.

Safavid Dynasty was originally a Turkic nomadic group; family originated in Surfi mystic group; espoused Shi’ism; conquered territory and established kingdom.

I hope this helps, Regards.

What is sweet clover poisoning? How does it occur?

Answers

Sweet clover poisoning is a problem of varying frequency and intensity in livestock wherever sweet clover grows. The toxic compound produced in sweet clover prevents normal blood clotting resulting in hemorrhages and associated symptoms.

(hope this helps ^^)

Answer:

During the process of spoiling, the coumarins in sweet clover are converted to toxic dicumarol, a potent vitamin K antagonist and anticoagulant. Any method of hay storage that allows molding of sweet clover promotes the likelihood of formation of dicumarol in the hay.

The primary organs of excretion are theA. heart and lungs.
B. lungs and kidneys.
C. kidneys and liver.
D. liver and pancreas.