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victus00 [196]
3 years ago
10

Please help, I’ll give brainliest.

Biology
1 answer:
Margarita [4]3 years ago
4 0

Answer:

it involves a physical exchange of chromosome segments in the tetrad (3)

Explanation:

def of crossing over

Crossing over is the swapping of genetic material that occurs in the germline

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I’ll put you as brainliest 10points !
vredina [299]

Answer:

Part 1:D) Fertilization

Part 2: C) The process combines genes from two individuals into a distinct organism.

Explanation:

99% sure its correct

3 0
3 years ago
Which greenhouse gas has an average lifetime in the atmosphere of a few weeks to thousands of years and is the largest contribut
lapo4ka [179]

Answer:

Greenhouse gases from human activities are the most significant driver of observed climate change since the mid-20th century.1 The indicators in this chapter characterize emissions of the major greenhouse gases resulting from human activities, the concentrations of these gases in the atmosphere, and how emissions and concentrations have changed over time. When comparing emissions of different gases, these indicators use a concept called “global warming potential” to convert amounts of other gases into carbon dioxide equivalents.

Explanation:

Why does it matter?

As greenhouse gas emissions from human activities increase, they build up in the atmosphere and warm the climate, leading to many other changes around the world—in the atmosphere, on land, and in the oceans. The indicators in other chapters of this report illustrate many of these changes, which have both positive and negative effects on people, society, and the environment—including plants and animals. Because many of the major greenhouse gases stay in the atmosphere for tens to hundreds of years after being released, their warming effects on the climate persist over a long time and can therefore affect both present and future generations.

8 0
3 years ago
what are some advantages and disadvantages of using permanent slides as opposed to temporary slides to view tiny aquatic animals
nikitadnepr [17]

Answer:

Permanent slides ensures preservation of the body parts of the tiny aquatic animals and also also aids good visualization.Most of the exoskeleton of   these tiny   animals are lost during temporary slides preparation, thus loss of visualization.

Because the animals are transfixed to a point, their body parts can not be moved.

It also saves time, energy and resources spent during observation.

However,because of dehydration during preparation  their natural color may be lost which may affect observation of natural features

Explanation:

3 0
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Your answer would be Aortic aneurysm
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liberstina [14]
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