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marshall27 [118]
3 years ago
13

Since he cannot cut out a piece of the floor, which steps should he perform to collect the saliva sample?

Biology
1 answer:
Veronika [31]3 years ago
8 0
Im not too sure what the answers you have are but cotton swab and put it in a bag if you write your own
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Explain, using natural selection, how the beetle population will adapt over time.
Julli [10]

Answer:

Over time the beetle population will adapt as a result of natural selection because the beetles "desired" by the birds will be eaten and their population will dimish as a result. The beetles that are not eaten by the birds will have a chance to allow their population to grow because a. they aren't being eaten and b. they have more space as the other colored beetle's population is shrinking. Causing the eaten species to become less prominant and the not eaten beetle's population to grow and take over in place of the other beetles.

6 0
3 years ago
Starlings are birds that were brought into the United States from Europe for breeding purposes. Their numbers have increased to
lesya [120]
The question is asking the determine the role that the United States do in the ecosystem base on the passage and situation in the question that you have state, base on my research, I would say that its role is a Dominant. I hope you are satisfied with my answer and feel free to ask for more if you have question and further clarification 
6 0
3 years ago
How is the structure of the phospholipid so perfectly paired to the function of the cell membrane?
zhenek [66]
Basically you have hydrophilic (water loving) and hydrophobic (water hating) the heads are hydrophilic and the tails are hydrophobic. this allows the cell to be selectively permeable. this means selectively allows or does not allow substances In or out
8 0
3 years ago
identify a probable reason that the dark moths survived while the light moths did not during the industrial revolution
nignag [31]

Answer:

directional selection

Explanation:

The directional selection is a type of Darwinian selection where a particular phenotype is favored in the population, thereby modifying the allelic frequencies to increase the proportion of the favored phenotype. <em>Biston betularia</em>, also known as peppered moth, is a species that was influenced by directional selection in its recent past. Before the industrial revolution, the frequency of light-colored moths was predominant compared to the darker-colored phenotypes, because this color has higher adaptive fitness in a clean, no pollution environment, thereby light-colored moths were able to avoid predatory birds. However, during the industrial revolution, the frequency of dark-colored moths increased in response to pollution (i.e. darker environment), thereby conferring a higher adaptive fitness to darker phenotypes.

5 0
3 years ago
What is the line of defence involved in phagocytosis​
makkiz [27]

Answer:

The second line of defence is nonspecific resistance, which kills intruders in a broad manner without focusing on specific individuals: phagocytic cells ingest and kill any germs that enter body tissues.

Explanation:

3 0
3 years ago
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