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
enot [183]
3 years ago
6

In an eight-cell embryo of an organism, the cells of the upper tier are aligned over the cells of the lower tier at a slight ang

le. Which organism is it likely to be? The choices are the following: Earthworm. . . . Starfish. . . . Sea cucumber. . . . Sea urchin.
Biology
2 answers:
lakkis [162]3 years ago
8 0

Answer:

Earthworm

Explanation:

Star fish, sea urchin and sea cucumber are echinoderms and exhibit radial cleavage.  The two tiers of cells of their eight cell embryo are aligned directly over each other. Earthworms are annelids and exhibit spiral cleavage during embryonic development in which upper tier of cells made an angle with cells of lower tier in eight celled embryo.

irakobra [83]3 years ago
7 0
<span>I think the correct answer among the choices listed above is option C. The organism described most likely is a starfish. This is because annelids and mollusks exhibit spiral holoblastic cleavage while the echinoderms have radial holoblastic cleavage.</span>
You might be interested in
Why are great white sharks never abundant
d1i1m1o1n [39]

Answer:

because of the amazing 0

Explanation:

yeah

4 0
3 years ago
60
Ksju [112]

Answer:

each mile is an hour

Explanation:

each mile is an hour depending on how fast your going like when ur in bed with another person. feels good and fast at the same time to reach the destination

6 0
3 years ago
The defecation reflex __________. involves long and short reflexes and involves two positive feedback loops involves two positiv
ch4aika [34]
The defecation reflex involves two postive feedback loops. these loops are the stretch receptors in the rectal walls and the sacral parasympathetic system. Defecation reflex empties the rectum by peristaltic movements push fecal matter from the sigmoid colon into the rectum. Then this distension of the rectal walls stimulates stretch receptors which results in defecation.
3 0
3 years ago
Why would a student who wants to be a doctor study chemistry?
Yuliya22 [10]
A doctor need to study chemistry: To know and understand the chemicals processes of matter in the body work which is for example insulin, DNA etc. and to study of all processes in a living organism. The three reasons to study chemistry is because chemistry can be useful in clearing up the natural world, preparing people for career opportunities and producing informed citizens. Some outcomes of modern research in chemistry can lead to technologies that aim to benefit the environment, preserve and produce energy, progress human life and multiply our knowledge of the universe. To help the citizen be a more informed citizen is to let them know how things work makes better decisions and use them better 
4 0
3 years ago
If someone gets an electrical shock, you should
Savatey [412]
All of the above I believe is the correct answer
4 0
3 years ago
Read 2 more answers
Other questions:
  • A person constantly comes in contact with pathogens that can infect body cells and cause disease. Which organ system is involved
    10·2 answers
  • What climate region in North America is influenced by the<br> prevailing westerlies?
    9·1 answer
  • All plants and animals in a food chain use energy. Where does this energy start from?
    11·2 answers
  • In a normal cellular protein, where would you expect to find a hydrophilic amino acid such as asparagine?
    12·1 answer
  • On what basis are rocks classified into three
    6·2 answers
  • This cycle differs from all of the other cycles because it occurs:
    13·1 answer
  • PLS HELP THE DUE DATE IS TOMORROW AND I CHOOSE AN URBAN CITY
    11·1 answer
  • 1. How are fossil fuels related to nuclear fusion?
    9·1 answer
  • transposons can integrate into the promoters of genes, what is the most likely outcome of such an event?
    8·1 answer
  • Which muscle extends the knee, laterally rotates the tibia, aids in abduction and medial rotation of the femur, and tautens the
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!