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scoundrel [369]
4 years ago
15

In the alternation of generations life cycle fertilization requires two A. sporophytes. B. gametophytes. C. gametes. D. spores.

Biology
2 answers:
Harrizon [31]4 years ago
8 0
The correct answer is C. Gametes
sveticcg [70]4 years ago
6 0

Answer:

C. gametes

Explanation:

The alternation of generations is a process of reproductive cycles that occur in plants, algae and cnidarians. The main characteristic of this type of reproduction is that it happens in two different generations alternating in a single life cycle of the organisms.

For this process to occur in plants, it is necessary that there is a generation that produces spores (sporophytic generation) and a generation that produces gametes (gametophytic generation). The generation that produces spores should produce diploid cells, while the generation that produces gametes must produce haploid cells.

When haploid cells arise from the germination of spores (which are haploid), the phase called gametophytic begins in the body, where the formation of two gametes (one male and one female) occurs. These gametes will merge during fertilization, generating a diploid embryo, which will undergo several mitoses until it becomes an adult that is capable of forming spores.

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masha68 [24]

The correct answer is option B, that is, covalent bonds.  

Covalent bonds are more prevalent in organic chemistry in comparison to ionic bonds. A covalent bond comprises of the concurrent attraction of two nuclei for one or more electron pairs. The electrons situated between the two nuclei are known as bonding electrons.  

Covalent bonds take place between different atoms or similar atoms whose difference in electronegativity is not enough to permit the transfer of electrons to produce ions. The covalent bond is demonstrated by either as a solid line or long dash or as a pair of dots.  


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4 years ago
What systems<br> makes up the larger Earth<br> system
zimovet [89]

Answer:

Geosphere

The Geosphere includes the rocks and minerals on Earth – from the molten rock and heavy metals in the deep interior of the planet to the sand

4 0
3 years ago
Which form of hypoxia occurs when body cells are unable to use o2 even though adequate amounts are delivered? (this type of hypo
Oksana_A [137]

Histotoxic hypoxia, which happens whenever body cells are not able to utilize oxygen while receiving sufficient amounts, is typically caused by metabolic toxins like cyanide.

What is hypoxia?

  • Hypoxia is a state in which there is insufficient oxygen reaching the tissues throughout the system or a specific area of the body.
  • Although fluctuations in arterial concentrations of oxygen are frequently associated with clinical conditions, they can also occur naturally during severe physical activity or hypoventilation training.

When does Histotoxic hypoxia occur?

When the supply of gas entering the cell is adequate, but the cells are unable to utilize the oxygen properly due to deactivated oxidative phosphorylation enzymes, histotoxic hypoxia develops. Ingestion of cyanide may result in this.

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2 years ago
Suppose earth landmasses someday all move together. Describe the changes that will occur in earths oceans in earths land masses.
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3 years ago
A lab investigation involves using food coloring to track diffusion. Which action should students take to avoid damaging their c
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While working in labs with chemicals or specimens one should follow good laboratory practices. Professional conduct and manner should be maintained during working in labs.

The action that should be taken by a student is:

Option B. Wear a lab apron or lab coat over the clothing.

The good lab practices can be explained as:

  • To avoid staining clothes individuals should wear lab coats over their clothes.

  • Lab coats avoid staining and splashing your skin and clothes from chemicals and dyes.

  • Lab coats are designed to protect against corrosive chemicals from soaking into the skin.

Therefore, the student should wear lab coats and aprons.

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