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
Charra [1.4K]
3 years ago
7

Louis Pasteur's experiments showed that bacteria did not grow in a flask unless they first entered from the surrounding environm

ent. What part of the cell theory did this prove?
A - New cells come from preexisting ones
B - All living things are made up of at least one cell
C - Cells are the basic units of life
D - All cells are surrounded by a thin membrane​
Biology
1 answer:
lesya692 [45]3 years ago
6 0
D) All cells are surrounded by a thin membrane
You might be interested in
External fertilization occurs in which type of environment?
lorasvet [3.4K]

Answer:

Aquatic

Explanation:

In aquatic environments, most of the upper and inferior eukaryons have external reproduction systems, for example, egg lying or free disposal of sperm. This is a common feature on fishes, mollusks, crustaceans, sea-worms, sponges and other lower forms.

It does not count for mammals, having these latest internal systems of reproduction.

All the other environment named, are terrestrial. Where the most majority of the living being had evolved to use internal fecundation.

6 0
3 years ago
Compare and contrast p-dependent and p-independent termination of transcription in prokaryotes.
iVinArrow [24]
Compare and contrast two mechanisms for transcriptional termination in bacteria.

(rho)p-dependent termination: requires rut (rho utilization site), rho protein binds, moves towards 3' end, DNA encodes GC rich for stem loop, RNApoly pauses, rho protein catches up and separates RNA-DNA hybrid

(rho)p-independent termination: Uracil-rich sequence causes RNApoly to pause, stabilized by NusA near open complex RNA exit, UA bonds to weak to hold, DNA-RNA hybrid dissociates AKA intrinsic termination

hope this help
4 0
3 years ago
The bases are paired by ____ bonds along the axis of the molecule?
Gnom [1K]

hydrogen is your answer

7 0
2 years ago
Fatty acids with double bonds between some of their carbons are said to be
scoray [572]

Answer:

unsaturated

Explanation:

it is said to be unsaturated because it can further react as not all the carbon hands are bonded

3 0
3 years ago
7. The liver pours extra __________into the body for energy?
iren [92.7K]
<span>7. Extra sugar into the blood to provide enough food source. It can also trigger the hormone adrenaline which gives energy. 8. Bone marrow increases the white blood cell count which overall increases the chance of countering infections 9. The parasympathetic nervous system is responsible for keeping the body at a relaxed state . I.e. it would reduce the heart rate if it is too high. The parasympathetic nervous system is affected by a stresser causing it to become inactive until the stressor has gone 10. increased blood pressure can develop into chronic stress. 11.If you have chronic stress lasting more than a month there is a high probability you will catch an infection. 12. Our sympathetic nervous system controls stress by changing our body state i.e. higher heart rate. 13. Renin is an enzyme that is secreted into the body by the liver which is used to restore liver stress levels. 14. Glucocorticoids is a series of hormones/drugs that are used to treat any inflammatory conditions especially in the brain, liver and kidney 15. The immune system is made up of more than a trillion white blood cells all coded to help deal with different types of pathogens. 16. Its a type of hormone produced by the thymus gland which is heavily used in the immune response to fight off infections. 17.a large cell that is found in the damaged tissue which helps fight off infection 18. It is a type of lymphocyte responsible for the production of antibodies. it can be found all over the body 19. *cannot be answered*</span>
7 0
3 years ago
Other questions:
  • Which of these is true of the cytoplasm of an unfertilized egg?
    12·1 answer
  • Recessive genes are _____.
    13·2 answers
  • Where in the head of the goldfish would you expect to find an extensive network of capillaries? Why?
    15·1 answer
  • Describe how our lives would<br> be different if the lightbulb<br> had never been invented.
    9·1 answer
  • True or False: Uncertainty is NOT a part of science. True O False​
    15·1 answer
  • Which type of lava is most likely to cause the most widespread damage?
    9·1 answer
  • Lysosomes are membranous sacs with hydrolytic enzymes that catalyze
    14·1 answer
  • Name one of the structures found in the plant cells but not found in bacterial cells ​
    7·1 answer
  • What questions do you have about our origins? What clues in nature can we look for to investigate this mystery?
    11·1 answer
  • Aside from neurons, epithelia are the only other tissue that can sometimes serve as?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!