<h3><u>Answer;</u></h3>
Waste
<u>Waste</u> is any unwanted substance or toxin that is expelled from organisms. Example: urea, carbon dioxide.
<h3><u>Explanation;</u></h3>
- <em><u>The body must remove waste products from the all the tissues in the body. These waste products are constantly being produced by the body tissues and must therefore be excreted, because if they are not, they will increase in concentration and may interfere with chemical reactions or damage cells.</u></em>
- <em><u>Waste products include, carbon dioxide and Urea</u></em>. They are excreted through various body system and excretory organs, which includes, kidney that eliminates water, urea and other waste products in the form of urine, lungs which eliminates carbon dioxide from the body, and skin which excretes excess water.
Explanation: we will conclude this by the following characteristics:
1.organims that lack a proper nucleus.
2.they have membrane bounded organelles
3.they are tiny single cell oraganisms which cannot be seen by naked eye.
4.they are the oldest livinh organisms on earth
5.they are present in very harsh conditions like volcanic vents or at the bottom of the sea
Answer:
A The DNA come from two genetically different parents.
Explanation:
Everyone has different genetics. They are determined by sex cells that are produced by MEIOSIS NOT mitosis. Meiosis allows for genetic variation amoung offspring along with the genetically different parents.
Here the experiment is on heart rate of a person
Controlled Variable:
Explanation:
- Both shall workout for the same time.
- Measure their heart rate and see who's heart rate is higher.
Independent Variable:
Explanation:
- Age is different for everyone and independent.
- Make them workout for the similar amount of time then measure their heart rate.
- Older person will have greater heart rate.
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- The person with <u>less heartbeat means he has a great fitness</u>.
- The person with <u>greater heartbeat means he has a bad fitness</u>.
