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Bingel [31]
3 years ago
9

Which is the definition of an embryo?

Biology
2 answers:
natali 33 [55]3 years ago
5 0
<span>Prenatal stage of a human beyond 8 weeks of development after fertilization.is the answer hope this helps </span>
Veronika [31]3 years ago
5 0

Answer:

Option A, Prenatal stage of a human up to 8 weeks of development after fertilization.

Explanation:

The stage of development in human being includes the following -

a) Two to three days after fertilization -  the fertilized eggs is called as zygote.

b) Three to fourteen days (2 weeks) after fertilization - the growing cell mass at this stage is called as blastocyst.

c) Third to eights week - This stage is known as embryonic development stage and the growing cell mass is known as embryo. During this stage, the cells differentiate and develop to form a baby human.

d) Ninth week to till birth - The newly formed human baby at this stage is known as fetus till  it takes birth.

Thus, option A is correct.

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According to the endosymbiotic theory, some organelles are believed to have evolved through a symbiotic relationship between euk
Inessa [10]
The Mitochondria in many cells, are believed to have been bacteria that have been incorporated in the cytophysiology. Mitochondria first off, contain their own DNA, er, RNA. Additionally physiologically the mitochondrion, has an inner membrane and some organelle traits similar to prokaryotic cells. Lastly Mitochondria are the only organelle capable of replicating itself. <span />
7 0
4 years ago
Dust is a mixture of different things, that is the reason that can posses charge.
bogdanovich [222]

Answer:

The first astronauts to land on the moon  observed the existence of thin layers of  dust hovering above the lunar surface. Like  there is no wind on the moon, it was understood that this  phenomenon was linked to the photoelectric effect  caused by sunlight: electrons are extracted from the

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loaded.

The same process also starts  electrons of the lunar surface, contributing to the  positive charge on the illuminated side of the  Thus, the electric field generated by the surface  of the moon makes the charged grains of sand suffer  electrical force upward by balancing your weight

Explanation:

Dust can be formed by small particles, smaller than 500 micrometers, but the nature can be so different from one place to another.

5 0
3 years ago
Read 2 more answers
Which of the following patterns in the fossil record would be an example of an organism evolving through punctuated equilibrium?
Yuki888 [10]
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Punctuated equilibrium is a series of small, gradual changes over long periods of time.
6 0
4 years ago
Some _____ become memory cells when exposed to an infection agent and, if they encounter the same antigen in the future, they ca
jasenka [17]

Answer: T cells and B cells

Explanation:

7 0
3 years ago
Please help!!
Nikitich [7]

Answer:

1. d.water comes "out of" or "exits" the reaction

2. a.energy goes "into" or "enters" the reaction

3. Path A

Explanation:

1) Peptide bond synthesis is dehydration reaction which means water is "dehydrated" meaning released when the reaction occurs.

2) Anytime we want to join things together we gotta use energy, these processes are anabolic reactions such as making sugars, proteins, lipids, in our cell. Since we are making protein here, we need to put energy into the reaction.

3) Path A is hydrophobic b/c they directly diffuse thru cell membrane to attach to intracellular receptor.

My best attempt, hope its right.

3 0
2 years ago
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