Frog hearts have a chamber where deoxygenated blood can mix with oxygenated blood. What structure would help prevent this mixing? A. atria
B. pericardium
C. septum
D.blood vessels

Answers

Answer 1

Answer: The answer is septum.
Frog hearts have 3 chambers - one ventricle and two atria. The left atrium receives oxygenated blood, and the right atrium receives deoxygenated blood and they both empty into the ventricle. Since there is only one ventricle, oxygenated and deoxygenated blood will mix. If there would be a septum in the ventricle, similar to those in lizards, less mixing will occur. Anyway, in frog's ventricle, there is a ventricular fold that prevents complete mixing of oxygenated and deoxygenated blood.

Answer 2

Answer:

Answer:

C. septum

Explanation:

The septum of the heart is the dividing wall between the right and left sides of the heart.

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Which of these biomes receives the greatest amount of yearly rainfall?boreal forest
grasslands
temperate forests
tropical forests

Answers

Tropical Rainforests. This biome gets the highest amount of rainfall every year and contain the most species of animals and plants. The average annual rainfall tropical rainforests get is 125 to 660 cm.

Answer:

B.Rain forests

Explanation:

apexs

Mitochondria are unique organelles in several ways. They contain a specific genome that allows them to code for their own proteins, and they can replicate to make more mitochondria within a cell. Which other characteristic makes mitochondria unique organelles?

Answers

Answer:

Explanation:

more mitochondria within a cell. Which other characteristic makes mitochondria unique organelles

Biogeochemical cycles on Earth serve a variety of different purposes. What do the biogeochemical cycles have in common?a. They all serve the same function in sustaining life on Earth.
b. They all include only nonliving components of an ecosystem.
c. They are all essential for sustaining life on Earth.
d. They all include only living components of an ecosystem.

Answers

The correct answer for the question that is being presented above is this one: "c. They are all essential for sustaining life on Earth." Biogeochemical cycles on Earth serve a variety of different purposes. The biogeochemical cycles have in common is that c. They are all essential for sustaining life on Earth.

Answer:

Explanation:

What has improved to make scientist better able to understand the cell

Answers

what has improved is an microscope

An microscope is what has improved

Which of these animals would be measured to have the most mass

Answers

I think you mean this
Which of these animals would be measured to have the most mass?an elephant
a goldfish
a dog
a fox
An elephant would be the logical answer for this question, since it is the biggest (and has therefore the most mass) of the four animals.

Answer:

Which of these animals would be measured to have the most mass?

AN ELEPHANT

a goldfish

a dog

a fox

Explanation:

What are the possible negatives of being a marine biologist?

Answers

Answer: There are negatives and I will describe them

Explanation:

There can be problems such as climate change in which can affect on what days we are allowed to go into the water. You always have to travel so you won’t be home much which can impact on your loved ones. This can get very frustrating when you’re finding yourself lost and when you are supposed to be finding something but you have already discovered it.

Final answer:

When taking about negatives of being a marine biologist, they faces challenges including shifts in marine populations due to increased ocean temperatures, dealing with the aftermaths of oil spills which harm marine ecosystems, and the regulation and monitoring of growing fish populations.

Explanation:

The role of a marine biologist entails a variety of challenges and potential negatives.

First, due to increases in greenhouse gas emissions resulting in increased ocean temperatures, marine biologists may face difficulties in studying and protecting marine species that are drastically affected by these shifts in their environment. They have to observe, study and document these changes which can be physically and mentally exhausting.

Furthermore, marine biologists often have to deal with the aftermaths of environmental degradation such as oil spills. Oil spills reduce the amount of light and oxygen entering the ocean, causing harm to marine life such as phytoplankton and animals.

This creates a stressful and dismal work environment, as the marine biologists try to limit the damage and save as many organisms as possible.

Finally, the decrease in human activities like fishing that lead to rebounds in fish populations actually translates to additional work for a marine biologist.

They have to monitor these fast-growing populations, ensure they do not become invasive and disrupt the marine ecosystem, and study their effects on other marine organisms. This cycle of work is perpetual and can be overwhelming for some.