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brilliants [131]
3 years ago
9

What technological advancement was necessary before scientists could begin to observe cells?

Biology
1 answer:
Sladkaya [172]3 years ago
8 0
They needed neuron and compound microscopes i am learning about that




WE HAVE STEM BRAINS :}
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The process of natural selection
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Answer:

3. shapes the genetic characteristics of a species as a consequence of adaptation

Explanation:

Natural selection is a process characterized by how plants and animals that are able to adapt to changes in their environment are able to survive and reproduce while those that are unable to adapt do not survive.

In natural selection, those variations in the genotype which increases an organism’s chances of survival and procreation are preserved and multiplied from generation to generation at the expense of less advantageous variations.

Natural selection is a way of enhancing the preservation of a group of organisms that are best adjusted to the physical and biological conditions of their environment and may also result in their improvement in some cases.

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3 years ago
Patty (age 7) has symptoms that include a skin rash, fever slowed growth, fatigue, and swelling in the joints. she was diagnosed
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Patty (age 7) has symptoms that include a skin rash, fever slowed growth, fatigue, and swelling in the joints. She was diagnosed as having juvenile rheumatoid arthritis.

What is juvenile rheumatoid arthritis described as?

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6 0
1 year ago
Which component of dna are held together by weak hydrogen bonds?
Troyanec [42]

Answer:

the paired bases( nitrogenous bases )

7 0
2 years ago
HELP PLEASE!! Field test is done on the milkweed in the wild and the clothianidin content per plant was about 1 ppb. larvae spen
MrMuchimi

Answer:

In the question it is given that the milkweed with clothianidin above the 1ppb concentration will result in less successful hatching of monarch butterfly eggs. Along with the data from the experiments, the exposure of clothianidin on the monarch habitats will lead to a decrease in the population of the monarch butterfly initially. Then in later generations if any mutation occurs and a resistant butterfly is developed then the population of the monarch butterfly will recover. But without this mutation the population size will be reduced and the size and weight of the butterfly will also get reduced.

Explanation:

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2 years ago
While a home was undergoing a renovation, workers discovered that there was asbestos in the walls. Before any further work could
Butoxors [25]
B.
Asbestos was used in housing for many years because it was cheap to manufacture and was amazingly heat-resistant, but was found to be incredibly dangerous, causing innumerous accounts of lung cancer and related problems.

This is from memory, but I will double check after I answer.
7 0
3 years ago
Read 2 more answers
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