Humans originated in Africa about 7 million years ago: if life on earth started 3.5bya ago and represented 24 hours from then to today, how many minutes of these 24 hours would be devoted to this 24-hour clocka) since the first humans showed up?
b) since Humans showed up 300,000 ya?

Answers

Answer 1
Answer: I don’t quite understand the answers that you’ve provided to choose from, but if we are comparing those millions of years to a 24 hour clock, then humans have only been around for 2.88 minutes of out the entirety of life on Earth.
Sorry if this didn’t answer your question, but I hope this somehow helps.

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In most cases What happens to a liquid when it cools

Answers

Answer:

it evolve heat to surrounding

Answer:

Density Increases, its Mass Decreases, Its Volume Increases.

Explanation:

Describe how one of the occupations that you studied would use descriptive statistics when performing their job

Answers

Answer:

Given the nature of descriptive statistics, psychologists will use descriptive statistics to assemble data about their clients through their observations of clients' behavioral patterns.  Then a sample of the data will be taken.  The sample is summarized statistically, interpreted, and recorded.  Psychological reports can be issued based on the observed statistical results.

Explanation:

Psychologists and other occupations use descriptive statistics to describe the basic features of the data in their studies or experiments. Descriptive statistics provide simple generalizable summaries about the observed sample and the calculated measures. Using simple graphics, they form the basis of quantitative data analysis.

Why is it impossible for humans to digest food that contains cellulose?

Answers

Answer:

      The right answer to this question is: we don't have a specific enzyme called Cellulase.

Explanation:

        An enzyme is basically a system known as lock and key mechanism. It works like this: every single enzyme has its own form, and there's only one way of getting into it for the digestion to happen, the substrate needs to complete this system, as a key on a lock, and once this happens, the digestion can start. But humans don't have this enzyme, if they don't have it, the digestion won't happen in this case. Well known animals that have it are the ruminants, they can digest cellulose easily because they have the specific enzyme called cellulase.

Answer:

it impossible for humans to digest the food that contains cellulose because they do have an enzyme which is required to break beta acetal linkage.

Explanation:

cellulose is a polysaccharide and it is synthesized by animals, plants and in plant cell wall major component is cellulose.

it impossible for humans to digest the food that contains cellulose because they do have an enzyme which is required to break beta acetal linkage.

Ruminants such as cows in the rumen symbiotic anaerobic bacteria are present, cellulases enzyme is produced by these bacteria, that help to digest the cellulose.

The English moth, Biston betularia, is often cited as an example of observed evolution. There are two colors of this moth, light anddark (typica and carbonaria). Kettlewell found that dark moths constituted less than 2% of the population prior to 1848. Then, the
frequency of the dark coloration began to increase. By 1898, the 95% of the moths in Manchester and other highly industrialized
areas were of the dark color. Using the moth example, analyze the events in order to identify support for the statement: natural
selection changes populations, not individuals. Choose ALL that apply.
A)
Variation in the population existed.
B)
Color variation is a result of different gene combinations.
In response to environmental change, moth coloration changed from light
to dark.
D)
Due to natural selection, the ratio of different genetic combinations is
changing
E)
Predator pressure resulted in the light colored genotype being removed
from the gene pool.
Evolution

Answers

Answer:

a,b,d,e

Explanation:

did it on usatestprep lol

Which of the following is a fomite?a. a prairie dog infested with fleas infected with the plaue bacterium
b. a river contaminated with the Giardia protozoan
c. a doorknob contaminated with the cold virus
d. an asymptomatic person infected with HIV
e. a mosquito infected with the malaria protozoan

Answers

Answer:

The correct option is: c. a doorknob contaminated with the cold virus

Explanation:

Fomites are the inanimate objects or substances that can get contaminated with the pathogens and are capable of transferring the pathogens to the new hosts.

Sterilization of the possible fomites should be done in order to prevent cross-infection.

Examples of fomites are hair, towels, clothes, door knobs, cups, switches, handrails, remote controls, pens, syringes, bedding, etc.

I need help ! Can someone please help me out !

Answers

Answer:leo committed insurance fraud

Explanation: