BIOLOGY COLLEGE

What does the cardiovascular system do?carries hormones for the endocrine system
transports oxygen and carbon dioxide for the respiratory system
sends nerve impulses to the brain and spinal cord
carries nutrients for the digestive system
works with the immune system to fight infection

Answers

Answer 1
Answer:

Answer:

transports oxygen and carbon dioxide for the respiratory system

Explanation:
Answer 2
Answer: It’s could be the second one but I’m not sure sorry

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Why are the oldest fossils found in the oldest rock layers?
1. What is the equation for the equilibrium constant, Keq, for the following general reaction: aA + bB → cC + dD Define each term in the equation. 2. What is the actual free energy change of the reaction above? Again, define each term in the equation. Express this equation in terms of mass action Q 3. What is the standard free energy change of the reaction above? Again, define each term.
Anyone got any good chewy chocolate chip cookie recipes

What are physical characteristics that help an organism survive

Answers

Answer:

Special characteristics adapted by specific animals allow them to carry out unique abilities in order to survive. For instance, a cheetah's long tail helps it balance when running at rapid speed in order to hunt. Or an arctic woolly bear caterpillar is able to be frozen and fill it's body with an antifreeze hormone that allows it to survive temperatures below freezing.

Use a dictionary to look up the meaning of the word providence from "Rikki-Tikki-Tavi." Which definition below most closely means providence? A. a unit of a religious order B. divine guidance or care C. a department of knowledge D. a town in the Central Bahamas​

Answers

Answer:

B. Divine guidance or care.

Explanation:

The short story "Rikki-Tikki-Tavi" is by Rudyard Kipling that revolves around the character of a mongoose with the title name. This story narrates how this small animal became a trusted part of the family and also saved them and the house from the dangerous cobra Nag and his family.

In the story, Rikki-tikki had just fought off Nag and Nagina and also Karait when Teddy's parents came. They exclaimed that he had saved their son from being bitten and were grateful for him. Teddy's father claims "he was a providence", which can be fairly taken as being guided or cared for by a divine being.

So, the correct definition closest to the word "providence" is option B. divine guidance or care.

What is the velocity of a car traveling north, 100 meters in 25 seconds? Explain how you got that answer

Answers

Answer:

4 meters/second (4 m/s)

Explanation:

velocity=distance/time

distance= 100 meters

time= 25 seconds

v=100m/25sec = 4 meters/second (4 m/s)

What is an age-structure diagram, and how can it predict population growth?

Answers

Answer:

Explanation: An age structure diagram is a model that predicts the population growth rate by a shape. It shows a comparative ratio of males to females and the bars show various age groups from infants - adolescents - reproduce - post reproductive.

A typical prokaryotic cell has about 3,000 genes in its DNA, while a human cell has about 20,500 genes. About 1,000 of these genes are present in both types of cells. Explain how such different organisms could have this same subset of genes ?

Answers

Answer:

same DNA bases and HGT

Explanation:

Even though we are different species,  so much as different kingdoms, the DNA is always going to be the molecule that contains our genetic information and constitute our genes. This molecule is made up by the same structure: a sugar, a phosphate and a base like adenine, guanine, cytosine, thymine. Regardless if its a human, bacteria, fungi or a plant cell we all share this in common.

It is well known that we acquire our whole set of genes from our ancestors but some studies have shown that we also acquire genes from other organisms and its called horizontal gene transfer (HGT). HGT involves the movement of genetic material between different species. Since we've been sharing the world with a lot of prokaryotic organisms we might have experienced the HGT at some point of the evolution, and since our genetic material is made up of the same molecules, we can have the same subsets of genes working in both organisms.

Answer:

The subset of genes shared by humans and prokaryotes originates from a common ancestor and has been retained over billions of years of evolution.

Explanation:

This is was the right answer on my teachers test.

If the metabolic rate of cockroaches at 15°C is 0.01 ml O2/hr and their metabolic rate at 25°C is 0.015 ml O2/hr. What is its metabolic rate at 20°C?

Answers

Answer:

0.0035 mL of oxygen per hour is metabolic rate at 20°C at cockroach.

Explanation:

  • Metabolic rate of cockroaches at 15°C is 0.01 ml O2/h
  • Metabolic rate of cockroaches at 25°C is 0.015 ml O2/hr

From the data we can see that metabolic rate of cockroach is in direct relation with temperature.

Rate \propto Time

On graph, with metabolic rate on y-axis and temperature on x axis straight line will obtained , and the equation of the line can be determined by the help of point slope:

(y-y_1)=m(x-x_1)

m = Slope of the line = (y_2-y_1)/(x_2-x_1)

As per information given , :

(x_1,y_1) , (x_2,y_2) = (15,0.01) (25,0.015)

m=(0.015-0.01)/(25-15)=(0.005)/(10)=0.0005

(y-0.01)=0.0005(x-15)

y-0.001=0.0005x-0.0075

y=0.0005x-0.0065

x = temperature

y = metabolic rate

Now , put x = 20

y=0.0005* 20-0.0065

y = 0.0035

0.0035 mL of oxygen per hour is metabolic rate at 20°C at cockroach.
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