1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
tekilochka [14]
3 years ago
12

All multicellular organisms begin as a skin cell. within four or five days, that first cell multiplies into a ball-like structur

e of about 100 cells. what is this structure called?
A. Blastocyst
B. Blood
C. Placenta
D. Heart
Biology
2 answers:
ladessa [460]3 years ago
8 0
The correct answer is A. Blastocyst.

I hope I helped!
lora16 [44]3 years ago
8 0
The answer is A , hope you got it
You might be interested in
What is the purpose of the pericardial sac that surrounds the heart in mammals
Nitella [24]

Answer:

Pericardial sac has protective tole

Explanation:

Pericardial sac or pericardium is a fibrous tissue that surrounds the heart. It has two coats:

  1. the outter coat-parietal pericardium
  2. the inner coat-visceral pericardium or epicardium which is double-layered and contains pericardial fluid between those two layers (pericardial fluid is necessary as a lubricant for the heart movement).

Besides lubrication, percardium also protects heart from infections, fixes it and limits its movements.

6 0
3 years ago
Me ayudan...<br> Necesito un mini ensayo de moleculares?
tatuchka [14]
Claro que yo no sabo como Hacer eso
4 0
2 years ago
If you have the frequency of the recessive allele for a gene, how do you get the
Nastasia [14]
B. subtract the frequency of the recessive allele from 1.
8 0
3 years ago
Give three examples of a stimulus and a possible response in humans
solmaris [256]
The three examples of stimulus include;
1. Hit the skin with a needle or pin is a good example of stimulus. The sudden removing of the hand is the response.
2. When somebody bangs a door you jump if you were unaware because of the sound. The jumping is the response to a stimulus.
3. Holding a hot plate we fling hand away from it. The stimulus here is holding the plate while removal of the hand is the response.
Stimulus is the change or cause in an organism's surrounding which causes the organisms to react.

4 0
3 years ago
Read 2 more answers
What is the main function of cytoplasm in a cell
Burka [1]

Answer:

It contains enzymes that can break down intracellular waste to a certain degree it is responsible for some metabolic process like ATP production via glycolysis finally it aids the cytoskeleton/microfilaments in give the cell and its organelles stability/support.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Which structures are found in both plant cells and animal cells?
    12·2 answers
  • Which is a fossil fuel? <br> ozone<br> coal <br> uranium <br> wood
    11·2 answers
  • Which is the most likely cause of the observed variation?a) differences in the climate among the islands b) competition among in
    8·1 answer
  • Hawaii is located over a hot spot. Because of this, Hawaii is most likely to experience A) tornados B) erosion C) hurricanes D)
    11·1 answer
  • Why do soils develop different horizons? What separates one horizon from another?
    12·1 answer
  • This photograph shows a protion of the Monahans Sandhills in northwest Texas. Monahans Sandhills are noted for their sand dunes
    8·1 answer
  • Bone marrow stem cells differentiate into any type of cell. true or false?
    12·2 answers
  • All you need is in the photo ​
    15·1 answer
  • 17. Match the major types of cancer with the types of cells they occur in
    10·1 answer
  • HURRY PLEASE!
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!