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
shusha [124]
3 years ago
5

the precambrian era begins with a) the first prokaryotic cells forming.  b) the appearance of animals with shells. c) the format

ion of the earth.
Biology
1 answer:
Airida [17]3 years ago
5 0
I think it is A 


hope this helps 
You might be interested in
Dr. kilbey is studying the impact of exosystems on human development. which of these would she be most interested in examining?
katrin2010 [14]
An exosystem is a system or environment that surrounds a child and has a high influence on the child's development; however, the child is not directly involved with with the environment. In order to examine exosystems more closely, one may visit places such as medical centers or religious institutions because both of these affect the development of a child's thinking process.
4 0
3 years ago
During photosynthesis, hydrogen ions are most directly used to _____________ in the chloroplast pictured above. A) make glucose
nexus9112 [7]

The answer is D.


hope this helps (:

3 0
3 years ago
Read 2 more answers
M protein is produced by
egoroff_w [7]

Answer:

The correct answer will be option- <em>Streptococcus pyogenes.</em>

Explanation:

M protein is an important virulence factor which is produced and expressed on the surface of <em>Streptococcus pyogenes. </em>

This protein plays important role in the bacterial infection like adherence to epidermal keratinocytes, resistance to phagocytosis,  invasion of epithelial cells and microcolony formation.

The M-protein is a α-helical coiled structure protein which consists of the four distinct regions (A–D) in which  A-region in the N-terminal is highly variable.

Thus,  option- <em>Streptococcus pyogenes</em> is the correct answer.

4 0
3 years ago
Vesicles formed during phagocytosis or endocytosis often fuse with the membrane of which of the following organelles? Vesicles f
Stolb23 [73]

Answer:

Lysosomes

Explanation:

Lysosomes are the organelles that have many digestive enzymes such as those for digestion of lipids and proteins. Most of the vesicles that bring substances into the cells by phagocytosis or endocytosis fuse with lysosomes. For example, the vesicles formed during receptor-mediated endocytosis fuse with lysosomes so that LDL particles and other substances are digested by the enzymes of lysosomes. The digested products then leave lysosomes so that cells can use them.  

5 0
3 years ago
In which of the following ways are tRNA and mRNA different?
ra1l [238]
The correct option is C.
5 0
3 years ago
Read 2 more answers
Other questions:
  • What happens to nearly all of the UV radiation that enters the atmosphere?
    14·2 answers
  • Although half of the moon is always illuminated when viewing it from space, only a portion of the moon is illuminated when we lo
    7·1 answer
  • Can someone plz give me an explanation on why #6 is correct? And also is #7 correct but I'm not sure and I need an explanation f
    11·1 answer
  • This object was observed in 1997.<br><br> The object in the picture is a/an .
    15·2 answers
  • Scientists use a standardized taxonomic system to separate organisms into hierarchical groups based on
    7·1 answer
  • Astrology is the study of earth moon and stars in space yes or no
    5·2 answers
  • Which of the following statements is true about Earth's crust?
    15·1 answer
  • List three potential benefits of the selective breeding of animals, such as cattle and goats.
    6·1 answer
  • All essential amino acids
    8·1 answer
  • CAN YOU PLEASE HELP ME(GIVING BRAINLIEST) NEED TO GET QUISTION CORECT FOR GOOD GRADE
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!