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Norma-Jean [14]
2 years ago
9

15) naturally occurring variations within a species are mainly the result of

Biology
1 answer:
pychu [463]2 years ago
3 0

Answer:

d mutations and competition

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The model below shows a human fetus at various stages of development. image Which choice BEST explains how the model illustrates
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Answer:

id say A:  

The model shows that the fetus becomes more complex during development. This is because mitosis allows the cells that make up the fetus to become specialized.

or D:

The model shows that the fetus gets larger as time goes on. This is because mitosis constantly increases the number of cells that make up the fetus.

Explanation:

4 0
2 years ago
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The reproductive structures in angiosperms are found in the
sveta [45]

Answer: c. Flower

Explanation:

An angiosperm can be define as a group of vascular plants. These plants are flower bearing which means they conduct sexual mode of reproduction through flowers. The flower exhibit male and female reproductive structures the fertilization of which produce seeds and fruits.

7 0
2 years ago
Describe the activity of chromosomes in each stage of meiosis 1 and meiosis 2
Solnce55 [7]
Prophase- *Nuclear membrane disappears

( so chromosomes can move around)

Metaphase- Chromosomes line up in the middle of the cell

Anaphase-*Chromosome copies pull apart from each other.

Telophase-<span>*Nuclear division has finished and nuclear membrane reappears</span>

<span> This is the process for Meiosis 1 not for 2 (FYI)</span>

4 0
3 years ago
Cancer can be described as a disease characterized by the cell cycle going out of control. Discuss what it means for the cell cy
Svetllana [295]
That answer sounds great! You might also want to add that the cell cycle is thrown out of control by the mutations that occur. Cancer is fundamentally the accumulation of reproduced mutated cells.
3 0
3 years ago
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A federally funded research study involving children 8 to 12 years old involves collecting a single voided urine sample to asses
777dan777 [17]

Answer: A federally funded research study involving children 8 to 12 years old involves collecting a single voided urine sample to assess the frequency of asymptomatic <em>proteinuria</em>.

Your IRB has determined that assent of children age 8 and older is required for the study. A 10 year old firmly declined to participate in the study.

The best procedure that describes the <u>action </u>to be taken by the investigator is:

  • Honor the Childs decision .

Explanation:    

The <em>purpose</em> of the IRB is to <em>assure that appropriate steps are taken</em> to <em>protect the rights </em>and welfare of humans participating as subjects in a research study. It promotes <em>fully informed and voluntary participation</em> by prospective subjects capable of making such choices (or, if that is not possible, informed permission given by a suitable proxy), and seeks to maximize the safety of subjects.

The capacity admits degrees. The same patient may be able to decide certain things and not others. So, the more transcendent or delicate a decision is, the higher the level of capacity required must be. When the patient <u>is not capable, it is up to his relatives to make the decisions.</u>

4 0
3 years ago
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