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
slega [8]
3 years ago
11

18. Approximately when did the first plants and arthropods appear on land?

Biology
2 answers:
quester [9]3 years ago
5 0

Answer:

C.

Explanation:

LenaWriter [7]3 years ago
3 0

Answer:

C. 444 Ma

Explanation:

The first plants that managed to colonize the land appeared around 470 million years ago, while the first arthropods on land appear i the fossil records around 450 million years ago, so we can say that around the period of 444 million years ago they were well established on land. The first arthropods that started to have terrestrial life were almost identical to those in water, with only minor changes that enabled them to breathe and move more easily. The first plants on land were non-vascular plants. They were small as they initially didn't had deep and well established roots.

You might be interested in
The cells that make up muscle are specialized to do their job by having many ?
Len [333]
<span>it is Cardiac muscle tissue. Cardiac muscle tissue is an extremely specialized form of muscle tissue that has evolved to pump blood throughout the body. In fact, cardiac muscle is only found in the heart and makes up the bulk of the heart’s mass. The heart beats powerfully and continuously throughout an entire lifetime without any rest, so cardiac muscle has evolved to have incredibly high contractile strength and endurance. And because the heart maintains its own rhythm, cardiac muscle has developed the ability to quickly spread electrochemical signals so that all of the cells in the heart can contract together as a team....</span>
7 0
3 years ago
Cultures of a bacterial species were incubated on the shelf of a refrigerator, out on a lab bench top, on the shelf of a 37°C in
Oksana_A [137]

Answer:

D. Psychrophile

Explanation:

Psychrophiles or cryophiles are a type of extremophiles i.e. they live in extreme environment. They grow well in low temperatures ranging from -20 to +10 degree Celsius.

Here, the bacteria was incubated at different temperatures. It did not show growth at standard incubation temperature of 37°C which indicates that it might be an extremophile preferring either very hot or very cold environment. But it also did not show growth at 50°C which means that it does not survive well at high temperature.

Lab bench top has generally colder surface compared to the surrounding environment and a little growth was observed there which indicates that this bacteria might require cold temperature for growth. The result was finally confirmed with abundant growth observed inside refrigerator which is only possible if it is a psychrophile.

7 0
3 years ago
The first organisms to photosynthesize are called
Lapatulllka [165]

Answer:

cyanobacteria

Explanation:

3 0
3 years ago
If Brittany is investigating how fast Brian will react to three different sounds, the independent variable in the experiment is
zimovet [89]

Answer:

False

Explanation:

The independent variables are the different sounds Brittany is making Brian react to.

4 0
3 years ago
A chemical property is determined by the following:
neonofarm [45]

Answer:

I would say D

Explanation:

Most chemical properties can be determined by performing experiments that use specific materials or processes with known characteristics

5 0
2 years ago
Read 2 more answers
Other questions:
  • Scientists find the same type of index fossil in two different locations on Earth. What can they conclude from this discovery? T
    15·2 answers
  • Help me fast this is do I. like 3 hours
    14·1 answer
  • The membrane that lines the thoracic cavity walls is the
    7·2 answers
  • Describe how the capillaries are adapted to allow this process to happen efficiently.
    5·1 answer
  • You are examining the DNA sequences that code for the enzyme phosphofructokinase in skinks and Komodo dragons. You notice that t
    15·1 answer
  • which of the following circumstances could be a cause of a miscarriage? a. maternal hormone balance b. genetic normality c. mate
    9·1 answer
  • Will give Brainliest, need help!
    9·1 answer
  • Please Help Me ! I don’t Know
    6·1 answer
  • Nitrogen from animal wastes or plant an animal tissue
    7·1 answer
  • The food test for proteins would be ______.( describe it) ​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!