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maks197457 [2]
3 years ago
8

What is meiosis? How many cells are produced? What are the cells called ?

Biology
1 answer:
zlopas [31]3 years ago
8 0
A type of Cell division that results in four daughter cells each with half the number of chromosomes of the parents cells as in production of gametes and plant spores.
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Biodiversity
rodikova [14]

Answer:

Please find the complete paragraph below; the missing words are inputed in bold.

Explanation:

One of the most important bioethical issues facing us today is the issue of _____EXTINCTION____or a loss of biodiversity

2. Defined as variation of life on Earth __BIODIVERSITY___is the number and relative abundance of different __SPECIES__.

3. It is estimated that there are as many as __8.7 million__ species in the world though as few as __2.3 million_have actually been identified.

4. As the human population grows and demands more resources, ___BIODIVERSITY_ is threatened.

5. Human activities contribute to habitat loss, especially in the world's coral reefs and tropical rain forests. As a result, some organisms face __EXTINCTION_or the death of their species

6. The growth of the __HUMAN___ population has destroyed up to 25% of _BIODIVERSITY__ and threatened another 30% statistics are similar for __ECOSYSTEM___ .

7. Humans also face __NEGATIVE___ consequences in that we are dependent on the ecosystem we are destroying for everything from food to raw material.

6 0
3 years ago
Look at an ocean system below what would most likely happen if the number of salmon decreased?
Ira Lisetskai [31]
The shrimp population would increase.
5 0
3 years ago
Read 2 more answers
How is energy transferred during an earthquake? through electromagnetic wavesthrough heat wavesthrough light wavesthrough seismi
Burka [1]

When an earthquake occurs energy is transferred, from where the rocks break, and travels throughout the world. The bigger the quake the further from the epicentre the waves will travel. There are two types of earthquake wave generated during an earth quake. They carry energy away from the earthquake epicentre.

5 0
3 years ago
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Can someone make me report for bees and flowers I know what to do but don't know how to make it into 300 words
dybincka [34]

Answer:

Bees and flowering plants have a mutualistic relationship where both species benefit.

Explanation:

Bees play a keystone role in the agricultural production and the beauty of our world through the pollination of fruits, vegetables, nuts, and flowers. The disruption of natural habitats leading to lack of "bee flowers,"

Once they reach adulthood, most living things take care of themselves and sometimes their offspring. However, certain plants and animals have developed helpful relationships with living things outside their own species. Scientists call such relationships "mutualistic relationships" because both organisms benefit from the arrangement. One of the most famous mutualistic relationships in nature is the relationship between bees and flowering plants. This relationship allows bees to feed their colonies and plants to reproduce

Bees and flowering plants have a mutualistic relationship where both species benefit. Flowers provide bees with nectar and pollen, which worker bees collect to feed their entire colonies. Bees provide flowers with the means to reproduce, by spreading pollen from flower to flower in a process called pollination. Without pollination, plants cannot create seeds.

How Bees Benefit From Flowers

Flowers benefit bees by providing them with all the food their colonies need, to survive. With the exception of a few species, bees are social insects that live in colonies of between 10,000 and 60,000 individuals. How many bees live in a single colony depends on factors such as the bees' species, the weather in their environment and how much food is available.

Bees feed on the nectar and pollen of flowers. Nectar is a sweet liquid substance that flowers produce specifically to attract bees, birds and other animals. Pollen is a powder that contains the male genetic material of flowering plants. Worker bees (bees whose job is to collect food for the colony) land on flowers and drink their nectar. This nectar is stored in a pouch-like internal structure called the crop. In the process of doing this, bees become covered in pollen. The pollen sticks to the bee's hairy legs and body. Some bee species even have sack-like structures on their legs for collecting pollen, called pollen baskets.

After collecting nectar and pollen from many different flowers, bees fly back to their colonies. They regurgitate nectar, mixed with enzymes, and expose the mixture to the air for several days, creating honey. This honey is used to feed the colony. Pollen is mixed with nectar to form a protein-rich substance called beebread. Beebread is primarily used to feed young developing bees, called larvae.

How Flowers Benefit From Bees

Bees benefit flowering plants by helping the plants reproduce, via pollination. Because plants cannot seek out mates the way animals do, they must rely on outside agents, called vectors, to move their genetic material from one plant to another. Such vectors include bees, certain birds and wind.

Flowering plants carry the male portion of their genetic material in their pollen. When bees fly from one flower to another, pollen is spread from plant to plant. If pollen from one flower is able to reach another flower of the same species, then that plant will be able to form seeds and reproduce.

Without bees, pollination and reproduction would be practically impossible for some plant species. This makes bees a vital part of every ecosystem they inhabit. Humans also greatly benefit from the pollination bees provide. Bees' work allows humans to enjoy fruits, vegetables and other plant products that would not be available otherwise.

Helping Bees

Bee flowers

You can help bees in four ways: plant bee flowers everywhere, provide nesting habitat, keep bee-flowers clean, and support our effrects to keeping

4 0
3 years ago
Explain two ways materials can enter the cell through passive transport. Include in your answer: the types of substance that is
blsea [12.9K]

Answer:

<em><u>Osmosis and facilitated diffusion</u></em> are two forms of passive transport that are integral to cellular transport mechanisms.

Explanation:

Cells surrounded by a bilipid layer or plasma membrane are amphiphilic, with their polar, hydrophilic lipid heads facing outward, while their hydrophobic non-polar lipid tails facing each other inward.

Although lipid-soluble molecules travel quickly through the bilayer, traveling across its surface into the cell is often difficult for charged and large molecules. Thus, transport proteins, pores and gated channels, transmembrane channels, embedded within the membrane, help to preserve selective permeability.

Across plasma membranes as a form of passive transport in cells, substances move via:

  1. osmosis - water molecules readily pass through the membrane;  the molecules move from high concentration regions to low concentration regions at will through the membrane- they move down their concentration gradient
  2. facilitated diffusion - channel proteins allow charged ions to move across the membrane. Sodium ions are able to pass freely through specialized sodium channel pores into some cells. These channels always remain open- the ions move down their concentration gradient.

3 0
2 years ago
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