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Ostrovityanka [42]
3 years ago
6

13. What is an atomic nucleus? (1 point)

Biology
1 answer:
kari74 [83]3 years ago
3 0

Answer:

<h2>C. The central part of an atom, composed of protons and neutrons</h2><h2>Explanation:</h2>

The nucleus contains protons and neutrons, electrons are located in outer electron cloud.

Hope this helps!

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In a certain species of plant, the allele to produce green melons (G) is dominant over the allele to produce yellow melons (g).
marishachu [46]

Answer:

4.26

Explanation:

Let the green-melon parents be Gg, then we expect the cross with the yellow-melon plant gg so as to produce 50% Gg and other 50% of gg offspring. What we observed was that 53 green and a 41 yellow. Based on the total number of 94 offspring , we expected half and a half ratios to be 47 of each color.

                                Observed(o)   Expected(e)   (o-e)    $(o-e)^2$      $(o-e)^2/e$

Green-melon plant        53                    47               6          36             0.766

Yellow-melon plant        41                    47              -6          36             0.766

Therefore the chi-square value is 1.53 which is less than the critical value of 3.84. Therefore, the null hypothesis is accepted.

4 0
3 years ago
What Are the major group of photosynthetic bacteria
neonofarm [45]

The bacteria are :

Blue green algae

Rizobium

Rhizopus

7 0
3 years ago
The density of solid aluminum is 2.70 . If a 1g piece of aluminum is dropped in a cup of water, it will . (The density of water
Olegator [25]
Sink to the bottom because it is more dense than the water.
3 0
3 years ago
Which organism was most likely to live st the same time as brachiopods
avanturin [10]

The organism that was most likely to live at the same time as brachiopods were

Trilobites

5 0
3 years ago
What distinguishes bogs, marshes, and swamps from each other?
vladimir2022 [97]
The answer is <span>b. Swamps are deeper and have a larger proportion of surface water than marshes, and bogs have acidic groundwater.

Bogs, marshes, and swamps are types of wetlands. Swamps and marshes are mineral soil wetlands. Swamps are deeper and with a larger proportion of surface water than marshes. Usually, swamps develop from marshes that fill in. Bogs are organic soil wetlands. They are acid areas with acidic groundwater.</span>
5 0
3 years ago
Read 2 more answers
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