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
Lady_Fox [76]
3 years ago
10

The three parts of the cell theroy

Biology
2 answers:
lozanna [386]3 years ago
7 0

Answer:

1) All living organisms are composed of one or more cells.

2) The cell is the basic unit of structure and function in living organisms.  

3) All cells come from preexisting cells.

Explanation:

These are the three most important statements to know. These are also the three parts of the cell theory.

Hope this helps!

saul85 [17]3 years ago
6 0

Here are the 3 parts of the cell theory:

1. Cells are the basic building blocks of any living things.

2. Any living thing is composed of more than 2 cells.

3. New cella arise from the old

You might be interested in
People sweat to help maintain body temperature. What type of feedback happens when sweating regulates body temperature?
Alexxx [7]
B. Positive feedback, it decreases body temperature.
3 0
3 years ago
Which statement below is an observation?
Shkiper50 [21]
The answer is C because there is no inference in the statement like the others.
3 0
2 years ago
Read 2 more answers
Consider a species of sparrow that originally lived only in Alaska but recently expanded its range through North America, then C
Shtirlitz [24]

Answer:

North America is the one with the highest heterozygosity frequency for most loci, followed by Central America, and finally, South America with the lowest heterozygosity level.  

Explanation:

Some different forces or mechanisms might alter H-W equilibrium and lead to evolution, such as mutation, natural selection, migration, and genetic drift.

In the exposed example, we have a species of sparrow that migrates from Alaska to North America. Migration is unidirectional, which means that the movement occurs in only one direction: from Alaska to North America. We should also consider that the first immigrants colonized the area for the first time, meaning that there was not a receiving population of the same species already established. Finally, we need to consider that Alaska´s environmental conditions are very different from North America´s environmental conditions.

When a species arrives at a new place, it needs to adapt. The establishment and dispersion of the species in the new area depend on previous adaptation. So, when the firsts sparrow individuals arrived in North America, they faced new environmental conditions that acted as selective pressures that drove to the occurrence of mutations. A mutation implicates a stable and inheritable change in the genetic material. A mutation introduces changes, new alleles in the population, variability. But mutation rates are very low and have no evolutive direction, so they need another force to increase or decrease the mutant allelic frequencies. Natural selection benefits new advantageous alleles and transmits them to new generations changing their relative frequencies. <em>So, sparrows arrive in North America, mutated, and natural selection favored the beneficial mutations leading to a better adaptation to the environment.</em> This means that the heterozygosity level in this new recent population is very high.

As animals adapt to the new habitat and have better dispersal genes, they get to disperse even more. So they start new migration south, to Central America and South America. Again, they are moving to new regions with new conditions, and to establish they need to suffer new adaptations. But remember that we are talking about a recent event in time. Probably the animals migrating south are just a few.  They have not spent enough time yet in the new area, to adapt to the new environment and to include new genes into their population. What is even more, as they are a small new population moving south, they are more vulnerable to genetic drift events. Genetic drift acts on a population decreasing the variability between individuals, hence, decreasing the heterozygosity. <em>This small population suffers low mutation, has not enough time to establish, and is more vulnerable to genetic drift events.</em> The heterozygosity level is probably inferior to North America´s one.

Comparing the three areas, we could say that North America is the one with the highest heterozygosity frequency, followed by Central America, and finally, South America with the lowest level of heterozygosity.

8 0
2 years ago
Which statement is correct?
Mariulka [41]
Both of them ahave aewds
6 0
3 years ago
PLEASE HELP MEEE<br>Cells that can differentiate into a variety of cell types are called _____<br>​
Pani-rosa [81]

Answer:

pluripotent

Explanation:

A cell that can differentiate into all cell types of the adult organism are called

"pluripotent". Like cells are named meristematic cells in higher plants and embryonic stem cells in animals, though some groups report the presence of adult pluripotent cells.

3 0
3 years ago
Other questions:
  • Please help me! does anyone know this?
    13·1 answer
  • Explain why fluctuating environments favor disruptive selection biology
    14·2 answers
  • Which component of the blood is part of the body’s immune system?
    8·2 answers
  • "the competitive exclusion principle only applies when species differ in their competitive abilities"
    13·1 answer
  • Which of the following will lead to speciation
    14·2 answers
  • WILL MARK BRAINLIEZT.
    10·1 answer
  • What would happen to the production of the high energy sugars if water or carbon dioxide were not
    15·1 answer
  • The unique properties of water enable life to exist on Earth. Which of these
    13·1 answer
  • 10 points for each answer no links
    14·2 answers
  • a culture started with 5000 bacteria. after 8 hours, it grew to 6000 bacteria. predict how many bacteria will be present after 1
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!