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blsea [12.9K]
3 years ago
11

If earth is about 4.5 million years old which statement is true

Biology
1 answer:
a_sh-v [17]3 years ago
5 0
Million or billion if it's million the answer is false
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4. In snapdragons, a gone that affects flower color has two alleles: red (R) and white
Charra [1.4K]

Answer:

See the answer below

Explanation:

a) Since the pink phenotype is heterozygous, the genotype would be RW.

b) The pink genotype is RW. Hence, a cross between two pink snapdragons will go thus:

          RW    x    RW

      RR    RW    RW    WW

<u>Expected genotypes:</u> 1/4 RR, 1/2 RW, 1/4 WW

<u>Expected phenotypes:</u> 1/4 red-flowered plants, 1/2 pink-flowered plant, 1/4 white-flowered plant.

6 0
4 years ago
What prevents the backflow of urine from the urinary bladder to the kidneys?
crimeas [40]
The urinary system is made up of the kidneys, bladder and ureters (tubes that connect the kidneys to the bladder). The kidneys act as filters removing extra fluid and waste from your blood to make urine. Urine passes from the kidneys into the ureters, which drain into the bladder. When the bladder is full, urine flows out of the body through a tube called the urethra. The ureters normally enter the bladder at a diagonal angle and have a special one-way valve system that prevents urine from flowing back up the ureters in the direction of the kidneys. If this system doesn’t work, urine can flow back towards the kidneys. This is called vesicoureteric reflux (also known as urinary reflux). Sometimes vesicoureteric reflux (VUR) can be associated with other 'plumbing' problems in the urinary tract and with small, damaged or malformed kidneys.

So I believe the answer is 1.
6 0
3 years ago
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According to hobbes, to achieve peace for ourselves and to avoid death, humans enter into a ____________ and submit to an overar
777dan777 [17]

English philosopher Thomas Hobbes, in his 1651 book titled “Leviathan”, which established the social contract theory, postulated that to achieve peace for ourselves and to avoid death; humans enter into a SOCIAL CONTRACT and submit to an overarching sovereign authority charged with ensuring peace for everyone.

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3 years ago
Which of the following phrases best describes climate?
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The answer would be the third choice: <u>it is usually dry</u>.  <u />Climate is the usual weather conditions in a specific area.

hope this helped :)
6 0
3 years ago
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Urban areas use __________ energy __________ than rural areas, mostly because so many more people live there. A) solar power B)
Morgarella [4.7K]

The correct answer is - B) more; in total.

The urban areas use much more energy than the rural areas, by far. The reasons for that are numerous, with the two biggest being the number of people and the industry.

The number of people living in urban areas is higher than the number of people living in rural areas. Also, the people in the urban areas use much more energy because they rely on much more technology, technology that uses energy in order to work.

Most of the industry is also located in and around the urban places. The industry is a huge consumer of energy, thus increasing the usage of energy further more.

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