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Mrac [35]
3 years ago
6

bservations of organisms include descriptions of why the organism has certain traits. descriptions of the number, size, and arra

ngement of parts of the organism. conclusions made about the characteristics of an organism. conclusions made based on an organism’s DNA.
Biology
1 answer:
Helen [10]3 years ago
6 0

Answer:

Scientists first discovered chromosomes in the nineteenth century, when they were gazing at cells through light microscopes. But how did they figure out what chromosomes do? And how did they link chromosomes — and the specific genes within them — to the concept of inheritance? After a long period of observational studies through microscopes, several experiments with fruit flies provided the first evidence.

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How can a pure white mouse help determine the genotype of a black mouse? (Hint: We cannot see genotype but we can see difference
sattari [20]

Answer:

A white mouse is purely recessive, and will produce black offspring if the other mouse contributes a black gene.

Explanation:

If Bb then the offspring will be 50% Bb and 50% bb. This is called a test cross, where we use a recessive to determine the genotype of a dominant phenotype.

8 0
3 years ago
HELP PLEASE I HAVE A WEEK LEFT OF SCHOOL I DONT WANNA FAIL
Oksana_A [137]

Answer:

I am too lazy to do this, but I am assuming you were supposed to do this in class. I will give you ideas.

Why is soil important?  Soil is our life support system. Soils provide anchorage for roots, hold water and nutrients. Soils are home to myriad micro-organisms that fix nitrogen and decompose organic matter, and armies of microscopic animals as well as earthworms and termites.

What is soil erosion?  Soil erosion is a naturally occurring process that affects all landforms. In agriculture, soil erosion refers to the wearing away of a field's topsoil by the natural physical forces of water (Figure 1) and wind (Figure 2) or through forces associated with farming activities such as tillage.

what human activities are responsible for soil erosion happening at advance rates?     Ploughing, unsuitable agricultural practices, combined with deforestation and overgrazing, are the main causes of human-induced soil erosion

What are some effects on soil loss?  The effects of soil erosion go beyond the loss of fertile land. It has led to increased pollution and sedimentation in streams and rivers, clogging these waterways and causing declines in fish and other species. And degraded lands are also often less able to hold onto water, which can worsen flooding.

What can be done to prevent soil erosion?   Maintaining a healthy, perennial plant cover.

Mulching.

Planting a cover crop – such as winter rye in vegetable gardens. ...

Placing crushed stone, wood chips, and other similar materials in heavily used areas where vegetation is hard to establish and maintain.

Explanation:  Hope this helps and have a great day

3 0
3 years ago
What protects and nourishes a developing fetus?
statuscvo [17]
The uterus protects and nourishes the fetus
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3 years ago
How does a nuclear power plant produce energy
Hunter-Best [27]
By using fossil fuels carhboreted
6 0
3 years ago
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Where do light dependent reactions occur
noname [10]
Thylakoid membranes.
7 0
3 years ago
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