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miv72 [106K]
3 years ago
7

What type of circulatory system do earthworms have?

Biology
2 answers:
Igoryamba3 years ago
7 0

Answer:

Closed circulatory system.

Irina-Kira [14]3 years ago
6 0

Answer:

a closed circulatory system.

Explanation:

an earthworm circulates blood exclusively through vessels.

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Suppose a male organism has a diploid chromosome number of 6. These chromosomes could be represented as A,a, B, b, C, and c wher
KatRina [158]

Answer:

A. The haploid set of n is ABC

B. ABC, ABc, AbC, aBC, abc, abC, aBc, Abc.

Explanation:

A diploid cell is a cell that comprises of two complete sets of chromosomes. This is double the haploid chromosome number. Each pair of chromosomes in a diploid cell is noted to be a homologous chromosome set. A homologous chromosome pair consists of one chromosome donated from one parent and one from the other parent. This number is represented as 2n. It varies in different organisms. A diploid cell replicates via mitosis. It preserves its diploid chromosome number by making an identical copy of its chromosomes and distributing its DNA in an equal manner between two daughter cells.

Haploid refers to a cell that contains a single set of chromosomes. Gametes are made up of half the chromosomes contained in normal diploid cells of the body, these are also known as somatic cells. Haploid gametes are produced during meiosis. Meiosis is a type of cell division that reduces the number of chromosomes in a parent diploid cell by half.

Therefore,

Karyotype of this organism is designated as AaBbCc.

AaBbCc is the diploid set (2n).

Hence ABC or abc are the haploid set (n).

B. The eight different combinations of these chromosomes that could possibly be produced by spermatogenesis in this male are:

ABC, ABc, AbC, aBC, abc, abC, aBc, Abc.

7 0
3 years ago
When might an organism rely on fermentation to produce the energy it needs?
devlian [24]
When there is not enough oxygen for cells to use cellular respiration<span />
6 0
3 years ago
A box weighs 34 N on Earth. What is the mass of the box? 3.47 kg 333.2 kg 115.6 kg 10 kg
IRISSAK [1]

Answer: Option (a) is the correct answer.

Explanation:

It is known that weight is equal to mass times acceleration due to gravity.

Mathematically,           Weight = mass × acceleration due to gravity

Since, it is given that weight is 34 N and it is known value of g is 9.8 m/s.

Therefore, calculate mass of the box as follows.

                    Weight = mass × acceleration due to gravity

                       34 N = mass × 9.8 m/s

                     mass = 3.47 kg

Hence, we can conclude that mass of the box is 3.47 kg.

7 0
4 years ago
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What is the difference between carbon dioxide and oxygen ( I’m in middle school )
Dmitry_Shevchenko [17]

Answer:

oxygen is a diatomic molecule having two oxygen atoms whereas carbon dioxide is a triatomic molecule having one carbon atom and two oxygen atoms. that is the answer

Explanation:

8 0
3 years ago
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The force that causes air to move into and out of the lungs is supplied by
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Ventilation is the act of moving/pushing air into and out of the lungs.
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