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vredina [299]
3 years ago
12

1. difference of microspore mother cell, microspore,pollen

Biology
1 answer:
Naily [24]3 years ago
5 0

Answer:

By the end of this section, you will have completed the following objectives:

Describe the two stages of a plant’s lifecycle

Compare and contrast male and female gametophytes and explain how they form in angiosperms

Describe the reproductive structures of a plant

Describe the components of a complete flower

Describe the development of microsporangium and megasporangium in gymnosperms

Explanation:

brainliest pls

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Which statement best illustrates a biotic or an abiotic factor that is often found in a city park?
ddd [48]

Answer:

Biotic: Plants

Abotic: Rocks

Explanation:

A biotic factor is something in an ecosystem or environment that is living. Some examples that could be found in a park are grass, flowers, trees, squirrels, pigeons, fish or people.

An abiotic factor is the exact opposite of a biotic factor: something in an ecosystem or environment that is not alive. Some examples that may be found in a city park include a park bench, a trash can, rocks, a playground, a pool, basketball court, temperature, and humidity.

5 0
3 years ago
What part of the respiratory tract is considered the respiratory zone?
Lorico [155]

Answer:

D. Alveoli

Explanation:

Functionally, the respiratory system is separated into a conducting zone and respiratory zone:

Conducting zone consists of the nose, pharynx, larynx, trachea, bronchi, and bronchioles. These structures form a continuous passageway for air to move in and out of the lungs.

Respiratory zone is found deep inside the lungs and is made up of the respiratory bronchioles, alveolar ducts, and alveoli. These thin-walled structures allow inhaled oxygen (O2) to diffuse into the lung capillaries in exchange for carbon dioxide (CO2).

The respiratory zone begins where the terminal bronchioles join a respiratory bronchiole, the smallest type of bronchiole, which then leads to an alveolar duct, opening into a cluster of alveoli.

8 0
3 years ago
Which glands secrete an oily product that softens the skin and hair?
OverLord2011 [107]
The sebaceous gland
7 0
3 years ago
Read 2 more answers
Drag the tiles to the correct boxes to complete the pairs.
kirill [66]

Answer:

Cause: Earth’s magnetosphere traps radioactive  solar wind particles in bands around Earth → Space travel through the Van Allen  belts is dangerous.

Cause: Earth is surrounded by a magnetic field → Effect: Solar wind deflects toward the poles.

Cause: Solar wind particles interact with Earth’s  upper atmosphere → Effect: An aurora is created

Explanation:

I have been able to drag the tiles to the correct boxes to complete the pairs.

When there is a trapping of radioactive solar wind particles in bands by the earth's magnetosphere, it becomes dangerous to travel in space through the Van Allen. Cosmic rays and solar particle add up to the additional hazards that it poses. A Van Allen radiation belt is known to be a zone  where energetic charged particles are found. Most of the energetic charged particles originate from the solar wind.  The solar wind  are captured by and held around a planet by that planet's magnetic field.

When the solar wind interacts with the earth's atmosphere, there is a collision of atoms of oxygen and nitrogen from the earth's atmosphere. The energy that is formed is a colorful glowing halo which is known as an aurora.

3 0
2 years ago
During what phase of Meiosis is DNA copied? *
Setler [38]
During the s-phase of interphase
5 0
3 years ago
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