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
Oksanka [162]
3 years ago
8

What causes the different time zones?

Biology
1 answer:
Korvikt [17]3 years ago
5 0

Answer:

The need for continental time zones stemmed directly from the problems of moving passengers and freight over the thousands of miles of rail line that covered North America by the 1880s. Since human beings had first begun keeping track of time, they set their clocks to the local movement of the sun.

You might be interested in
What is the importance of feedback signals at key checkpoints within the cell cycle?
grigory [225]

to delay or trigger the next phase of cycle

6 0
3 years ago
If an organism expresses a recessive phenotype, can you tell the genotype? Explain your answer by giving an example.
blondinia [14]
Yes can you tell the genotype because obviously if you can tell the genotype then there you go
4 0
3 years ago
Generalized defense responses in organs distant from the infection site are called _____.
Alika [10]
For the answer to the question above, the answer is "Systemic Acquired Resistance''.
<span>it is a whole-plant resistance response and it occurs by following an earlier localized exposure to a pathogen. It is analogous to the innate immune system that can be found in the animals, and there is also an evidence that SAR in plants and innate immunity in the animals may be evolutionarily conserved.</span>
 

8 0
3 years ago
During childbirth, a woman will experience muscle contractions in her uterus in response to pressure generated by the fetus. As
lesya692 [45]

Answer:

here

Explanation:

In a negative feedback loop, an increase in a factor will result in a change in the body that'll reduce the value of this factor to the set point.

For example, an increase in the blood glucose levels after a meal will cause an increase in the levels of insulin in the blood which will lower the glucose levels.

However, in this example, an increase in the pressure generated by the fetus also increases the frequency of uterus contractions. So the more the pressure, the more the contractions.

7 0
3 years ago
*WILL MARK BRAINLIEST IF CORRECT*
wolverine [178]

This is all about dominant and recessive genes. According to the picture it looks like the yellow flowers have the dominant genes YY and the green flowers the recessive yy. You breeded the YY with the yy to get Yy.  Now you have a plant with the dominant and recessive gene. The green flowers are  recessive so if you breed 'y'  with anything you get yellow flowers whether they only have the'Y' gene or the both 'Y' and 'y'.

6 0
4 years ago
Other questions:
  • Which of the following is not a reason why observed genetic distances between species do not reflect the actual distances?
    5·1 answer
  • An organism that is multicellular, heterotrophic, has cell walls, and is unable to move independently would be classified into t
    6·1 answer
  • What type of dating is most likely used to determine the absolute age of an animal bone that are less than 45,000 years old?
    5·2 answers
  • Which of the following definitions best sums up the study of geography?. A. the study of biological processes in the human body.
    9·2 answers
  • Are carrots seedless ,vascular ,or both
    5·2 answers
  • Which of the following diseases is not explained by Germ theory
    12·2 answers
  • What is the number of chromosomes made at the end of mitosis and meiosis?
    11·2 answers
  • What are the charges both inside and outside of the neuron before you click the stimulate neuron button?
    6·1 answer
  • State two changes which take place in the flower after pollination​
    8·1 answer
  • The organelle that is involved in cellular respiration and is linked to development of?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!