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egoroff_w [7]
3 years ago
7

What is the first step of pregnancy

Biology
2 answers:
luda_lava [24]3 years ago
6 0

Answer: Fertilization

The stages of pregnacy are:

  • Fertilization
  • 1-week conceptus
  • 2-week conceptus
  • 3-week embryo
  • 4-week embryo
  • 5-week embryo
  • 6-week embryo
  • 7-week embryo
  • 8-week embryo
  • 9-week fetus
  • 12 week fetus

fredd [130]3 years ago
4 0
Missed period I believe
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compare the four kinds of tissues connective tissue, epithelial tissue, muscle tissue, and nervous tissue. hi and also if you do
kirza4 [7]
<h3><u>Connective tissue:</u></h3>

It is the layer under the epithelial tissue in the body. It is stronger than epithelial tissue and is found in many organs. It provides protection.

<h3><u>Epithelial tissue:</u></h3>

It covers the outside of the body like a veil. located in the outermost part of the body. Protects the body against microbes and infections.

<h3><u>Muscle tissue:</u></h3>

It is located in the joint areas and forms the support and movement system. It allows us to make bodily movements.

<h3><u>Nervous tissue:</u></h3>

It is the fastest communication tissue. It allows us to feel pain and the sense of touch. It is impossible to repair this tissue after it is damaged. It causes paralysis. It is very important as it plays a role in the activity of neural transmission.

3 0
2 years ago
Two principal approaches governing the study of animal behavior​
Ksivusya [100]

Answer:

Ecological and ethological approaches to the study of behaviour. The natural history approach of Darwin and his predecessors gradually evolved into the twin sciences of animal ecology, the study of the interactions between an animal and its environment, and ethology, the biological study of animal behaviour.

8 0
3 years ago
What is the principle of independent assortment?
riadik2000 [5.3K]
<span>the principal of independent assortment is the different genes </span>independently<span> separate from one another when reproductive cells develop.</span>
4 0
3 years ago
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PLSSSS HELPPPPPPPP ME THIS IS SO HARD PLSSS
creativ13 [48]

Explanation:

read the passage first

6 0
2 years ago
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Which is not an example of secondary succession? I WILL GIVE 30-40 EXTRA POINTS IF YOU ARE CORRECT!!
ladessa [460]

Answer:

Lichen colonization of a rock field exposed by a retreating glacier(Primary Succession)

Explanation:

some examples of secondary succession:-Fire, hurricane, tornado ,Human disturbances: logging, mining, farming

  1. Changes that occur in an existing area
  2. Soil was already present
  3. -Rapid growth
6 0
3 years ago
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