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3 years ago

Answer these pleaseeee

Biology

1 answer:

Sergio039 [100]3 years ago

5 0

First one should be true because neutrons don't carry a charge therefore they won't affect the overall charge of the atom.
Second one should be positively charged, dense, and contains most of the mass of the atom

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During digestion, what process or action breaks food down into smaller units that can be absorbed by the body?

padilas [110]

Another nutrient, fat, stores energy. Before your body can use these nutrients, they must be broken into smaller substances. is the process of breaking down food into usable materials. Your digestive system transforms the energy and materials in foodinto forms your body can use.

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4 years ago

The epithelium of the esophagus is composed of which type of epithelial tissue?

lesya692 [45]

Answer:

Stratified squamous epithelium

Explanation:

Most animals, including humans, have stratified squamous epithelium in their esophagus. It may include keratin, which gives an extra layer of protection, allowing them to eat bigger and less chewed food. It should be noted that the esophagus has a mucous membrane and because of the muscular layers, called muscularis mucosae, the food can pass rapidly through it preventing damages in its layers due to coarser or abrasive food.

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4 years ago

What is the best definition of the term “biological diversity”?

Gala2k [10]

"Biological diversity" means the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part: this includes diversity within species, between species and of ecosystems.

7 0

4 years ago

Plsssssss helppp!!!!!!!

slavikrds [6]

Answer:

Um how do you answer it ???

6 0

3 years ago

A corn plant known to be heterozygous at three loci is testcrossed. The progeny phenotypes and numbers are as follows:+ + + 455a

astraxan [27]

Answer:

The progeny phenotypes and numbers are as follows:

+ + + 455-------- parental

a b c 470-------- parental

+ b c 35----------- recombinant

a + + 33---------- recombinant

+ + c 37------------ recombinant

a b + 35--------------- recombinant

+ b + 460---------- parental

a + c 475----------- parental

Total 2,000

+ + + 455-------- parental

a b c 470-------- parental

+ b + 460---------- parental

a + c 475----------- parental

It is two point testcross

So the parental ++ (455+460); ac (470+475)------------------++/ac

Gene order is ------------- ++/ac

+ b c 35----------- recombinant

a + + 33---------- recombinant

+ + c 37------------ recombinant

a b + 35--------------- recombinant

sum of recombinants--------------140

Frequency of recombintion= recombinants/total x100

Map distances between a-c = (140/2000) x 100 = 7 mu

a------------------7 mu -----------------c

Explanation:

8 0

4 years ago