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kipiarov [429]
3 years ago
15

What structures have parasite worms lost? What structures/organs are expanded?

Biology
1 answer:
Ne4ueva [31]3 years ago
6 0

Explanation:

Something that is lacking, is a circulatory system. Instead of a typical circulatory system flatworms exchange oxygen with the air outside through diffusion. This is the process by which gases will pass through a membrane from an area of high concentration to an area of low concentration.

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Research by Yu and Fu (2011) found that approximately _____% of dreams are reported to involve sexual activity.
UNO [17]

Answer: 12 per cent

Explanation:

The REM sleep is associated with the prolonged erections males and  pelvic thrusting in the females.

It is not being pursued for further studies as a concern of the function of REM sleep. The Yu and Fu found that the sleep involves the dreams about sexual activity.

The desires and fantasy of the real life appears to be complete in the dreams and 12 per cent of the total population see these dreams.

7 0
3 years ago
This cladogram compares the protein sequence of Cytochrome C. The percent numbers indicate matches in sequence.
jok3333 [9.3K]

Cytochrome C is a homologous protein and developed from a common ancestor is the correct interpretation of the graphic.

<h3>What is a Cladogram?</h3>

This is a diagram which describes the relationships between different groups of taxa which are referred to as clades.

Since all the organism have some form of similarity in the protein  sequence then it means that they came from a common ancestor.

Read more about Cladogram here brainly.com/question/12275760

#SPJ1

3 0
2 years ago
Describe the purpose of the Nucleus in a cell / discuss the DNA structure inside of the nucleus and what is the job of DNA and h
liberstina [14]
The nucleus is able to control and regulate the rest of the cell(it basically tells it what to do). The DNA is made up of chromosomes,the DNAs shape is a double helix and is tightly packed inside of the nucleus. The job of the DNA is to regulate the rest of the cell and tell the cell what kind of cell it is and what job it needs to do(ex all cells are different so the dna determines the type of cell like a bone cell or blood cell) this ties in with genetic because your dna makes up your cells and your cells make up who you are.
8 0
3 years ago
The shortest day of the year in the northern hemisphere is
Svet_ta [14]

Answer:

December 22nd

Explanation:

6 0
3 years ago
Read 2 more answers
Why do you think that root hairs are produced only on the parts of the root system that have stopped growing?
Triss [41]

Answer:

question no 1 answer

A root hair,or absorbent hair, the rhizoid of a vascular plant, is a tubular outgrowth of a trichoblast, a hair-forming cell on the epidermis of a plant root. As they are lateral extensions of a single cell and only rarely branched, they are visible to the naked eye and light microscope. They are found only in the region of maturation of the root. Just prior to and during root hair cell development, there is elevated phosphorylase activity. Plants absorb water from the soil by osmosis. Root hair cells are adapted for this by having a large surface area to speed up osmosis. Another adaptation that they have is a large permanent vacuole.

question no 2 answer

Answer: Stems hold the plant upright and support it. They also transport water, minerals and sugars to the leaves and roots.

hope it helps

because i have taken it on by book

5 0
3 years ago
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