what are some traits of an index fossil? what are they used for?

A useful index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time. Index fossils are the basis for defining boundaries in the geologic time scale and for the correlation of strata.

When the moon blocks the sun's light, a ____ eclipse occurs.
A. solar
B. lunar
C. partial
D. full

QUICK AND EASY FOR SOME POINTSSSSSS
______________ is the name for the process of clearing natural vegetation and replacing it with concrete and buildings

PLEASE HELP, this is for science water molecules

Why is Professor Jean-Jacques Muyembe-Tamfum's research and scientific contribution to the medical community an important source of information to the world?

The population size of organisms in an ecosystem is based on a variety of limiting factors. The graph
below shows how a rabbit population changed in size over a five-year time period.



Based on the information in the graph, what is the maximum number of rabbits that can obtain
what they need to survive in this ecosystem?



A.about 35

B.about 10

C.about 5

D.about 25

The diagram below shows a food web. The organisms in a food web can be classified based on how they
get the energy they need.




Which organism in this food web is a primary consumer?



A>mouse

B>snake

C.fox

D.hawk

Organism's traits depend on the____in its cells.

1.colors

2.fats

3. lipids

4. proteins

What type of current is most likely found in the deeper ocean depths, and why?

ok i got it
please help

Which characteristic of our solar system is most crucial to support life on Earth?
A.the length of time of earths revolution
B.distance between the earth and sun
C.the distance between the sun and other stars

Margaret Brown traveled to France to
A. recuperate
B. vessel
C. gazed
from so much hard work in her community.

Light energy travels as -

A: compressional waves
B: primary waves
C: surface waves
D: transverse waves

Assignment: Energy Flow in Ecosystems Exploration
NOTE: Don't forget to submit a photo or scanned image of your food chain display diagram
OR the digital file of your food chain diagram along with this assignment worksheet.
(I have already answered all the questions, I just need a display/diagram) To send me the picture please use one of these apps:
disc ord: * *#9599

Snapcha t: xxeag19

When geneticists cut genes from one organism and insert them into the DNA sequence of another organism, the process is called

Which of these statements best describes the connection between biodiversity and evolution?
The more biodiversity an area has, the greater the chances of new species arising.
If biodiversity is high, then more predation will take place, preventing species from evolving,
Without a lot of biodiversity, organisms are more likely to survive, so they have more time to adapt.
Evolution depends upon low biodiversity to keep population sizes down, which increases numbers of genes.

If you saw a new moon on Sunday, when will you probably see a full moon?
A) on Sunday in one week
B) a week from Friday
C) on Sunday in two weeks
D) on Wednesday in two weeks

Help!!!!!!!!!!!!!!!!!!!!!

Which statement explains why secondary succession is generally more rapid than primary succession?
An area of secondary succession has never been colonized.
There are no competing organisms in secondary succession.
The soil is already present at the start of secondary succession.
Pioneer species in secondary succession include bacteria.

The picture below shows a mangrove ecosystem. In this ecosystem, pelicans nest in mangrove trees.
Crabs consume mangrove leaf litter. Snails consume algae on mangrove roots.



How would a decrease in mangrove trees in this ecosystem affect the other living things there?



A.Snail, crab, and pelican populations would decrease.

B.Snail and crab populations would decrease while pelican populations would increase.

C.Pelican populations would decrease while snail and crab populations would increase.

D.Snail, crab, and pelican populations would increase.

Scientists recorded the size of a population of house finches in a forest ecosystem from the years
1995 to 2005. The graph below shows the information that was recorded.




What change in the limiting factors in the ecosystem could have caused the population change that
occurred between 2001 and 2002? Explain your reasoning.

Which of the following is true about the sun's radiation? It is long-wave. It is short-wave. 40 percent is reflected by the atmosphere. 60 percent reaches Earth's surface. None of the rays are harmful.

Which type of molecule speeds up chemical reactions in living things?

Lipid
Nucleic acid
Protein
Water

hey help please......

Is the following statement true or false:
It takes the same amount of time for the moon to rotate on its axis as it takes it to complete a revolution around the earth.

PLEASE SOMEONE DO THIS, The questions are:
1) Mention 5 different types of pathogens and mention within each type one harmful and one harmless example.
2) What is the main difference between nonspecific and specific immune responses? Mention 3 examples for each of them.
3) Mention 6 examples of white blood cells. When blood is centrifuged, where do white blood cells are found?
4) Be able to mention all of the steps involved in humoral and cell mediated immunity. After mentioning the 4 steps, explain what is the reason every step is happening. Have in mind that you need to explain 8 steps, since there are 4 per mechanism.

The _____ controls what enters and leaves the cell.
1.mitochondria
2.endoplasmic reticulum
3.nucleus
4.cell membrane

First person to answer it with all the question right gets brainly Est Question 1 (3 points)
To function on their own, what must unicellular organisms do?

Question 1 options:

work with other cells


perform a specialized task


make tissues


do all jobs for survival

Question 2 (3 points)
All living things are made of ______.

Question 2 options:

multicellular


tissues


cells


organisms

Question 3 (3 points)
A fish laying hundreds of eggs is an example of _________.

Question 3 options:

producing offspring


obtaining energy


all of the answers are correct


maintaining structure

Question 4 (3 points)
What do we call the branch of science for classification of organisms?

Question 4 options:

Taxonomy


Physics


Chemistry


Biology

Question 5 (3 points)
Which example is NOT a basic need of all organisms?

Question 5 options:

water


soil


food


appropriate enviornment

Question 6 (3 points)
All successful organisms must be able to do what three things?

Question 6 options:

obtain energy, produce offspring, eat


obtain energy, eat, play video games


maintain their structure, eat, build a home


obtain energy, produce offspring, maintain their structure

Question 7 (3 points)
Which example is NOT an organism?

Question 7 options:

bacteria


mold


human


lung

Question 8 (3 points)
What is an example of "maintaining structure"?

Question 8 options:

eating an apple


a cell dividing


healing a broken arm


catching a fish

Question 9 (3 points)
Which type of organism is ale to cause an infection or contagious disease?

Question 9 options:

rose


plant


animal


bacteria

Question 10 (3 points)
Saved
What do all living things need?

Question 10 options:

energy, water, sunshine, and protection


oxygen, an outer covering, parents, vitamins


food, water, air, and a place to live


water, parents, a place to live, and air

hello i need help again

THIS IS THE THIRD ASKING thIS QUESTION
only number 3

With 20 points, please answer!