Population density is calculated by
a. dividing the number of organisms in a region by the land area
b. multiplying the number of organisms in a region by the land area
C. dividing the land area by the number of organisms in the region
d. by subtracting the land area from the number of organisms in a region

Answer:

A). Dividing the number of organisms in a region by the land area.

Explanation:

The formula for calculating population density PLUS example:

which characteristic of life is describe the process of homeostasis

Animals are made up of which type of cells?

Which gas is removed from the atmosphere during photosynthesis?

A. hydrogen
B. oxygen
C. nitrogen
D. carbon dioxide

what happens during frameshift mutation?

pls answer this test is due tomorrow!

I need help with this it’s due at 12:00 PM

Which is the largest organ?

sartorius
skin
hair
gluteus maximus

Science. The gluteus is the butt muscles

how do yo abbreaviate adenosine triphosphate

HELP ME PLEASE ITS DUE IN TODAY

Please help ASAP 65 POINTS IF YOU GET IT RIGHT!!!

Brendan made a chart to categorize the characteristics of animals.

An empty 2-column table titled Characteristics of Animals. Column 1 is labeled Always. Column 2 is labeled Sometimes.

Which phrase should be written in the column titled "Sometimes”?

Are multicellular
Have membrane-bound organelles
Produce their own food
Display an asymmetrical body plan

Match the trend in American eating habits with the related meal.
mini-meals in restaurants
a meal category in sharp decline
a meal most people report eating
:: snacks and appetizers
:: homemade meals
:: breakfast

Name the 2 stages of photosynthesis

Which amino acid sequences can be coded from the DNA sequence CAG TAG CGA?

can someone help me with this ? i’ll give brainlist

describe the different processes involved in the movement of these substances into and out of the cell; oxygen, carbon dioxide, glucose, potassium, water, and enzymes.

When you start with 3 cell, at the end of mitosis, how many identical cells will you have?

QUICK ASAP PLS Certain bacteria live and grow on the roots of some plants and produce chemicals that are beneficial to the plants. Which of the following observations best supports the claim that this relationship is beneficial to the plants?



Group of answer choices

Plants with a higher amount of the bacteria on their roots have increased rates of survival and reproduction.

When the bacteria are removed from the plant roots and are grown in a laboratory setting, they fail to survive.

The population size of the bacteria varies greatly depending on the chemistry of the soil and the type of the plant.

The chemical produced by the bacteria can be created by humans and added to the soil where it reaches the roots of the plant.

Help me out with this question please

________Is responsible for most of the damage buildings suffer during earthquakes????

Which statement is the most accurate about cold air?

C. Warm air rises because it is denser.
B. Warm air sinks because it is denser.
A. Cold air rises because it is denser.
D. Cold air sinks because it is denser.

How many possible versions of each gene are there?
1
2
3
4

I get it! Now I know that organisms are classified _____

Check answers please? Thanks

1. What is the function of a top predator in an ecosystem?

A. It increases the food for other predator species.

B. It creates imbalance in the ecosystem.

C. It maintains populations. **

D. It helps increase the number of prey.

Reason - The answer is C because predators couldn't possibly increase the food for other predators. They obviously don't imbalance the ecosystem since they help keep it cycling. And they can't increase the number of prey if they're eating prey so therfore you're left with C.

2. Which is considered a top predator in the ocean?

A. A shark**

B. A sea lion

C. A small whale

D. A bird.

Reason - The answer is A because actually the top predator in the ocean is the killer whale but since it's not an option, you'd wanna go for a shark. A small whale obviously couldn't eat a big shark, nor could any of the others. :)

3. What happens to an ecosystem during normal seasonal flooding?

A. The biodiversity of the area reaches equilibrium.

B. The biodiversity of the area increases. **

C. The biodiversity of the area decreases.

D. The biodiversity of the area stays the same.

Reason - Just trust, I'm trying to finish this post and got tired of giving reasons. Sorry and thanks:)

4. How is the impact of seasonal flooding different from damming a river?

A. Seasonal flooding helps balance biodiversity, but damming does not.

B. Seasonal flooding is not considered an ecological disturbance like damming.

C. Seasonal flooding does not impact biodiversity for as long term as damming.**

D. Seasonal flooding increases biodiversity, but damming does not.

Reason - Again, trying to finish this and tired of typing reasons but the answer is indeed C because damming a river can causes long-term damage to biodiversity and the ecosystem while it can quickly recover from a flood because it doesn't really damage as much and the flood will simply be gone after a bit. :)

5. Would a long-term increase in the average temperature of a region be considered a significant disturbance in the ecosystem?

A. No, because it would not create large-scale changes in the environment.

B. No, because increases and decreases in average temperatures are normal.

C. Yes, because such a change could have a large-scale impact on wildlife. **

D. Yes, because any slight change in temperature is considered a distribution.

Reason - Eh.. it's pretty self explanatory. ​

An organism has died next to a river.
Describe how that organism could become a fossil.

The rising levels of oxytocin during childbirth contractions are an example of what type of feedback?
A. positive
B. negative
C. neither​

When humans come to a previously pristine environment, they inadvertently bring organisms with them that can be harmful to the local flora and fauna. Such organisms are known as _____.

The processes involved in the rock cycle include all of the following EXCEPT:
compaction
O condensation
O weathering
O erosion
1

Which is a reason that many organisms that have existed on Earth have left no fossils?
A. Many organisms live only in rainforests.
B. Fossils cannot form underwater.
C. Fossils can only form near volcanoes.
D. Fossils decay according to their half-life.

The diagram shows how wind can push warm surface water away from an area to be replaced with cold, nutrient-rich water from deep in the ocean. What is this process called?


A.
chemosynthesis
B.
drainage
C.
evaporation
D.
upwelling

Most plants appear green because chlorophyll:

A. absorbs green light
B. absorbs voilet light
C. reflects green light
D. does not absorb voilet light

What is the function of the organelle identified in the picture

A night sky with bright green, yellow, and red colors.
One evening, you see the northern lights, which are shown in the image.

In which layer of the atmosphere do the northern lights occur?

troposphere
stratosphere
mesosphere
thermosphere