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kaheart [24]
3 years ago
14

Double fertilization means that __________.

Biology
1 answer:
myrzilka [38]3 years ago
6 0

Answer:

Option (A).

Explanation:

Double fertilization is seen in the plants of the angiosperms. This process is also known as triple fusion. Two sperms are involved in the process of double fertilization.

The two sperm that enters through micropyle, one fuses with the egg cell is known as syngamy. The other sperm cells fuses with the two polar nuclei, this is known as double fertilization.

Thus, the correct answer is option (A).

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Some bacteria live in the roots of plants like soybeans and peas what role of these bacteria in the nitrogen cycle
kolezko [41]

Answer:

there is the answer to your question

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3. The island of Rum in Scotland had wolves and trees 500 years ago. It now has neither. A. Offer one hypothesis for the current
pychu [463]

To test for the keystone species hypothesis, the wolves in another region can be removed or trees can be reintroduced to see the effect on the ecosystem.

<h3>What is a keystone species?</h3>

A keystone species is an organism whose existence defines an entire ecosystem such that them, the ecosystem would be severely affected or may not exist.

Trophic cascades are events which result in serious distortions in an ecosystem as a result of the removal or addition of a top predator.

To test for the hypothesis of keystone species and trophic cascades, the wolves in another region can be removed or trees can be reintroduced to see the effect on the ecosystem.

Learn more about keystone species at: brainly.com/question/2044051

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2 years ago
Match the following. 1. the basic building block of all forms of life resolving power 2. the idea of Schleiden and Schwann that
Roman55 [17]

Answer:

1. Cell

2. cell theory

3. Organismal theory

4. resolving power

Explanation:

The cell is the smallest known unit of all living organisms. They are called the building blocks of life. An organism can be unicellular (made up of one cell) or multi-cellular (made up of many cells).

2. Cell theory was formulated and developed  by Schleiden, Schwann, and Virchow. They are considered as the basic principles of biology.

It states:

1. Living organisms are made up of cells.

2. Cells are the basic unit of life.

3. Cells are formed from pre-existing cells.

4. Energy flows inside the cell.

5. DNA is passed on from cell to cell.

6. All cells have the same basic chemical composition.

3. Organismal theory is the intended counter-argument of the cell theory. It was developed by Reichert, Strasberger, Sherrington, and Pavlov. It argues that the basic unit of life is the organism itself, suggesting that an organism came about from a cell that expanded.

4. Resolving power is the ability of an optical instrument like a microscope or a telescope to view objects that are close together as separate, abling the viewer to distinguish the two from each other.

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3 years ago
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lisov135 [29]

No muscle contraction will be observed.

<h3>What is the effect of calcium concentration on muscle contraction?</h3>

The concentration of calcium ions in the muscle cells help in contraction and relaxation of muscles fibers.

Release of calcium ions initiate muscle contraction.

Therefore, there will be no contraction of muscle if calcium ions are not transported out from the sarcoplasm.

Learn more about muscle contraction and calcium ions at: brainly.com/question/14760686

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