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Setler [38]
3 years ago
15

3. Which of the following statements explains why atoms are always neutral in charge

Biology
1 answer:
Anna35 [415]3 years ago
5 0

D.

They have the same number of protons as electrons.

Explanation:

Protons are found in the nucleus of the atom and have a positive charge while electrons orbit around the nucleus and have a negative charge. Usually, in a neutral atom of an element, the number of protons is equal to the number of electrons. This is why the atom has no charge because the positive and negative charges cancel out. When an atom loses an electron its charge turns positive while when it gains an electron its charge turns negative.

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6. species Closely related of orchids never mate in the wild because they bloom at different times. This is an example of ______
Dimas [21]

Answer:

temporal reproductive isolation

Explanation:

The correct answer would be temporal reproductive isolation.

<u>Reproductive isolation</u> generally refers to series of biological mechanisms or processes that prevent members of different species from mating/fertilization or prevent the product of their mating to be invalid.

Some reproductive isolation processes prevent members of different species from mating or prevent fertilization as a result of mating. These processes are known as pre-zygotic reproductive isolation mechanisms.

Some other processes ensure that the product of fertilization (when it occurs) is invalid. These are known as post-zygotic isolation mechanisms.

<em>A good example of the pre-zygotic reproductive isolation process is </em><em>when closely related by different species bloom at different times</em><em>. This will prevent mating or cross-pollination to happen between the different species. This is known as temporal reproductive isolation.</em>

5 0
3 years ago
Question 23 (6 points)
Stels [109]

Answer: 1. Sea urchins and sea otters

2. They are prey for carnivores.

3. Sea otters, star fish

Explanation:

Sea urchins and sea otters are carnivores as they eat on the flesh of starfish and sea urchins respectively.

Starfish feed on the kelp forests which are the producers in the food chain and the starfish is the primary consumer and prey for sea urchins.  So, starfish and kelp forests are the prey in the marine ecosystem.

Keystone species is the one which controls the population of other inferior species in an ecosystem. Here, sea otters consume sea urchins so the population of sea urchins remained in control Starfish controls the population of kelp forest.

 

8 0
3 years ago
Which plan wanted equal representation in Congress?
babymother [125]

Answer:

Small-state delegates hoped to protect states' rights within a confederate system of government. Fearing the effects of majority rule, they demanded equal representation in Congress, as was practiced under the Articles of Confederation and assumed in William Paterson's New Jersey Plan.

Explanation:

3 0
3 years ago
Read 2 more answers
The distance from earth to the moon is about 238,854 miles.
masya89 [10]
We were taught years sgo that it was 240,000 miles.
6 0
3 years ago
What is an organ system composed of?
IRINA_888 [86]
The cells make up tissues and they make up organs and the organs make up organ systems
4 0
2 years ago
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