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umka2103 [35]
3 years ago
6

BRAINLIESTTTT ASAP!!! please explain your answers. :)

Biology
2 answers:
QveST [7]3 years ago
6 0
The two are potassium and rubidium. Why? Na is an alkali metal. As you go down the metals become more reactive. 
Calcium has 20 protons. Why? The atomic # is 20 (the one at the top).
It has 20 neutrons. Why? The atomic mass (the number on the bottom) is ~40, ignoring electron mass. 40- 20 protons = 20 neutrons. 
It has 20 electrons. 
Why? The # of protons and electrons is the same. Ions aren't on the periodic table.
Please mark brainliest if I helped you!
exis [7]3 years ago
4 0
Answer: POTASSIUM and RUBIDIUM 
Potassium and Rubidium are both Alkali Metals, as such is Sodium. They are alike in many ways, as is why they are categorized in the same group (Alkali Metals). <span>
The properties of Alkali Metals are as follows:
</span>they have low melting and boiling points compared to most other metals.they are very soft and can be cut easily with a knife.<span>they have low densities (lithium, sodium and potassium will float on water)
</span>
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THE CASE (adapted from “Shark Attack” by H. House) 8 year-old Jim Morris was swimming the Gulf off of Florida. While swimming, J
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1.) 5 organ systems that the surgeons had to mark for reattachment
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These are just some result of my research.. better use search engines for further answers. there was an online presentation made on the above case study.
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3 years ago
A group of students participated in a lab to investigate the effects of osmosis. On day-
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Answer:

again egg and increase in size

8 0
3 years ago
Upon examining samples of water and mud from a nearby river, you come across an unidentified organism. The organism is unicellul
Tasya [4]

Answer:

A protist

Explanation:

In the given question, the characteristic of an unidentified organism are given which are:

1. The organism is unicellular and autotrophic which means that it is a producer and belongs to a plant like organism.

2. The membrane bound nucleus means that the organism is an eukaryote.

The organism is thus an unicellular, autotrophic and an eukaryote could be a species of algae which is considered a protist. The protists are the organisms which shows characteristic of the ukaryotes but are not considered true plants and animals.

Thus, a protist is correct answer.

3 0
3 years ago
Most red deer who successfully reproduce have about four fawns during their lifetimes. However, a small percentage of red deer p
Rasek [7]

Answer:

Natural selection will favor red deer that produce a dozen or more offspring that survive for at least a year.

Explanation:

Natural selection results in adaptation, which means the increase of the aptitude phenotype.  Aptitude is the contribution of each genotype to the next generation.

Natural selection is the result between the individual phenotype and the environment that determines the destiny of genes. It is the differential capability of individuals to leave offspring.

Aptitude (or fitness) is the phenotype that results in the survival, fertility, and capability of having a mate. It is a way of measuring the individual ability to leave fertile offspring. Aptitude must be significant to the natural selection act in its favor.  

Natural selection, eventually, will favor red deer that produce a dozen or more offspring that survive for at least a year. These animals have more chances of leaving fertile descendants that will be able to grow, develop, survive, and reproduce. They have a higher aptitude than those individuals that only have four fawns during their lifetimes. These animals have fewer probabilities of leaving survival descendants able to reproduce.

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3 years ago
As you grow older, you will need to remain physically active to keep a good level of physical fitness.
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As you grow older, you would need to remain physically active to keep a good level of physical fitness.

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2 years ago
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