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koban [17]
3 years ago
8

Which of the following is an example of an open system?

Biology
1 answer:
Crank3 years ago
5 0
A is the answer to this problem
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Do Birds Really Abandon Their Chicks If Humans Touch Them? 25 points!!
Lerok [7]

Answer:

no

Explanation:

"According to folklore, birds will reject their eggs and young if humans have so much as laid a finger on them. ... No matter how flighty birds appear, they do not readily abandon their young, especially not in response to human touch, says Frank B. Gill, former president of the American Ornithologists' Union."

5 0
3 years ago
Give two reasons why cells divide. Please help.
Dmitrij [34]
For growth, repair and differentiation
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3 years ago
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A student is designing a controlled experiment to test whether the amount of water that a plant receives affects its growth. Whi
MA_775_DIABLO [31]
The amount of water should be changed by the student
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3 years ago
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1. Which of the following processes requires ATP?
Verizon [17]

Question 1. Which of the following processes requires ATP?

A.osmosis

B. facilitated diffusion

C. moving down the concentration gradient

D. active transport

2. What is made in the nucleolus?

A. lipids

B. ATP

C. Ribosomal RNA

D. proteins

3. What is a function of Cilia?

A. help w cell division

B. provide structural support

C. move materials on the outside of the cells

D. provide sperm w motility

Answer:

1. d

2.D. proteins

3. D. provide sperm w motility

Explanation:

7 0
3 years ago
If a mother has a blood type AB+- and her father has a blood type B- and she marries a man with O- blood type. What is the perce
Marina CMI [18]
Genetics, blood type gene has two alleles, each allele has genotype A, B or O. The A and B are dominant, and O is recessive. So allele A combined with allele O is type A. Similarly, BO is type B, AA is type A, BB is type B, OO is type O, and AB is typeAB.

If both parents have type A blood, then the alleles could be AA or AO, thus the allele A frequency is 75%, allele O frequency is 25% for both parents. 
So the chance of alleles OO is 25% × 25% = 6.25%, 
alleles AA is 75% × 75% = 56.25%, 
alleles AO is 75% × 25% = 18.75%, 
alleles OA is 25% × 75% = 18.75%.
Since AA, AO and OA are blood type A, and OO is blood type O, thus their child has 6.25% chance to be blood type O and 93.75% chance to be blood type A. 

The +/- is called the rhesus factor, with + being dominant, and - being recessive.
So if both parents are -, the kids are always -, otherwise the kids might be + or -. 

Child Blood Type Estimate Table:
Father's Blood TypeABABOMother's
Blood
TypeAA/OA/B/AB/OA/B/ABA/OBA/B/AB/OB/OA/B/ABB/OABA/B/ABA/B/ABA/B/
8 0
4 years ago
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