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Luda [366]
2 years ago
9

3.4.2 Quiz: Why Are Cells So Small?

Biology
2 answers:
Maslowich2 years ago
8 0

Answer:

cells are so small because it is structural functional unit of an organism which can be only seen through microscope

viva [34]2 years ago
4 0

Answer:

A culture medium provides water, nutrients, and a place for waste products to be removed for a living cell.

Explanation:

Water is important for many cell processes and makes up a majority of the cell. Osmosis is the process of water moving in and out of the cell and is dependent on the concentration of water molecules. The cell membrane is a double layer of phospholipids that allow small molecules like water and gas to pass through but not larger molecules. The cell membrane also has protein channels that allow larger molecules to pass through.

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Does drug legalization increase cases of addiction/drug abuse
andrey2020 [161]
No , it didn't increase cases of addiction.
4 0
2 years ago
Which organ in the integumentary system keeps germs from entering your body?
Andrew [12]

Answer: The main organ of the integumentary system is the skin.

Explanation: The skin regulates body temperature, keeps germs from entering your body, and produces vitamin D to help absorb calcium.

6 0
2 years ago
The testcross makes it possible to determine the genotype of an individual of unknown genotype who exhibits the dominant version
klio [65]

Answer:

All of the above answer choices are correct.

Explanation:

Test cross is done to find out the genotype of an individual displaying dominant phenotype as it can be homozygous or heterozygous. To find this the individual is crossed with a recessive phenotype individual. For example: a dominant trait tall height can be homozygous TT or heterozygous Tt. If it is TT all the offspring of test cross with tt will be tall. If it is Tt half of the offspring will be tall and half of the offspring will be short.

Multiple offspring are required to come to the final result because offspring production happens in random order and it might take a few tries before another type of phenotype is produced. For example: If a test cross produces an individual with dominant phenotype we can still not surely say if the test individual is homozygous or heterozygous because both can produce dominant phenotype in test cross. We need more offspring to check if the recessive phenotype is produced or not and accordingly decide the genotype of test individual.

Hence all of the above answer choices are correct.

6 0
3 years ago
describe and explain the adaptations of sperm and ovum that enables fertilisation and early development of the embryo to occur​
Mekhanik [1.2K]

The adaptations of the sperm and egg that allow fertilization to take place, and copulation occurs for the sperm to be deposited. These sperm penetrate the cervix and travel to the fallopian tube. There, they must find an oocyte, which is released in the process of ovulation.

<h3>What is fertilization and embryo development?</h3>

In the first weeks after fertilization, the zygote makes many changes and develops rapidly. The first eight weeks of development is known as the organogenic period and is the embryonic stage of development. This period is a crucial phase of development for the embryo's organs.

With this information, we can conclude that The first three days of embryonic development occur in the fallopian tube as the embryo moves from the ovary to the uterus. Cell division continues and forms a hollow ball of cells (the blastocyst). Six days after fertilization, the embryo begins implantation into the lining of the uterus.

Learn more about  embryonic in brainly.com/question/14560716

#SPJ1

4 0
1 year ago
Read the blog entry below and answer the question that follows:
slega [8]
The answer would be B. The author was worried he/she might not enjoy camp. 

He/She wasn't impatient because it said she "dreaded" it so that rules out A.
He/She wasn't welcoming the opportunity, because again, the word "dreaded" was used.
He/She wasn't excited because "dreaded" does not imply excitement. 
5 0
2 years ago
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