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lora16 [44]
2 years ago
5

What is a closed circulatory system

Biology
1 answer:
Maslowich2 years ago
5 0
Sorry if this is wrong but a closed circulatory system is blood that is contained inside blood vessels, circulating unidirectionally (in one direction) from the heart around the systemic circulatory route, then returning to the heart again.
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Arrange the following in the correct sequence, from earliest to most recent, in which these plant traits originated. 1. sporophy
zavuch27 [327]

Answer:

Earliest- gametophyte dominance, sporophyte dependence

Middle- sporophyte dominance, gametophyte independence

Recent-  sporophyte dominance, gametophyte dependence

Explanation:

The life cycle of plant alternates between the two phases: the haploid gametophyte which produces gametes and the diploid sporophyte which produces spores.  The evolution of land plants shows how these are dependent on each other in terms of the requirement of nutrition.

In bryophytes, the gametophyte is the dominant phase on which the sporophyte depended. Later in pteridophytes, the sporophyte became dominant which is present in the later evolved groups namely the gymnosperms and the angiosperms. The gametophyte was independent on the sporophyte but in angiosperms and gymnosperms, it is dependent.

3 0
3 years ago
What is the polymer of nucleic acid?
pshichka [43]

Answer:

Nucleic acids are polymers of individual nucleotide monomers. Each nucleotide is composed of three parts: a 5-carbon sugar, a phosphate group, and a nitrogenous base.

8 0
2 years ago
Read 2 more answers
As a plant grows, new root hair cells are formed from unspecialised cells.
Marina86 [1]

Answer:

Root hairs appear in the root maturation zone and differentiate from unspecialised cells called trichoblasts.

Explanation:

Root hair arises as a small protrusion surrounded by a cell wall, they are found in the piliferous area; they can originate in unspecialised epidermal cells, in some called trichoblasts. The bump begins to elongate and moves away from the epidermis, forming root hair. The root hairs as they lengthen, it is seen that their content shows a polarized distribution, the apical part is constituted mainly by vesicles secreted by the Golgi apparatus that contain the precursors of the cell wall that are to be released by exocytosis. Trichoblasts can be arranged in different ways, there are roots where any of the cells that are part of the rhizodermis can give rise to a root hair. In other roots, trichoblasts and atricoblasts have been seen to be distinguished alternately along a row of cells.

4 0
2 years ago
A type of asexual reproduction where part of an organism breaks off and develops as a new organism
erastova [34]

The answer is budding. IN this type of asexual reproduction, the offspring are genetically identical to the parent. Examples of an organism that reproduces by budding include hydra, starfish, corals, and sponges. Yeast, fungi, also reproduce asexually by budding.






3 0
3 years ago
Metamorphosis is a type of homeostasis. <br> a. True<br> b. False
Vsevolod [243]
Metamorphosis is a type of homeostasis. A. is the correct answer.
4 0
3 years ago
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