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Masteriza [31]
3 years ago
5

Which steps do scientists take when investigating the natural world

Biology
2 answers:
hram777 [196]3 years ago
8 0
Form a question, develop a hypothesis, make observations, conduct controlled experiments, make predictions, collect data, analyze data, develop a conclusion.
MatroZZZ [7]3 years ago
4 0

Answer:

The following are the steps taken by the scientists when investigation the natural world:  

1. Forming a question.

2. Establishment of a hypothesis.  

3. Making observations.  

4. Performing controlled experiments.  

5. Forming extrapolations.  

6. Gathering information.  

7. Assessment of the data collected.  

8. Forming a conclusion.  

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Bio 254 - Pre-Class Assignment 1
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Question 1:

<u>Answer</u>:

The "first line of defence" in innate immunity is "Physical and chemical barriers".

<u>Explanation</u>

"Physical and chemical barriers" is first line of defence includes  that are  ready to defend the living organism's body from infection at any time . These barriers include your skin, cilia, tears, urine flow, mucus, stomach acid, friendly bacteria and white blood cells . Skin acts as a mechanical barrier as it does not allows all the organism to pass through it unless the skin is cut or open. Similarly mouth eyes, and nose are also the ways through with the disease causing organism can enter the body. The micro-organisms that entered through these pathways are trapped either in saliva or mucus and swallowed and later either killed in the stomach or flushed out via the urine. If this first line of defence is broken or damaged, the second line of defence inside our body will be activated.

Question 2:

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Histamine kinins, and interleukins are examples of inflammatory mediators.

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3 years ago
A bag like structure that can store waste substances and pigments
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Answer:
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<u>Definition:</u>

The sex hormone  and endogenous steroid present in human and other species ' menstrual cycle, pregnancy, and embryogenesis are known as "Progesterone" while the primary sex hormone in females  responsible for the development and control of the female reproductive system and for the characteristics of secondary sex is termed as "Estrogen" or "oestrogen".

<u>Progesterone Effects:</u>

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  • Progesterone has main effects on human sperm by non-genomic signals, as they move through the female tract before fertilization.
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<u>Estrogen Effects:</u>

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

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

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