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Valentin [98]
3 years ago
12

Sponges, members of the Porifera, might be the simplest multicellular

Biology
1 answer:
Gnom [1K]3 years ago
5 0
The evolution of cells with nuclei and organelles
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What does nitrogen fixation accomplish?
alexgriva [62]

Answer:

A. It allows plants to use nitrogen to grow.

Explanation:

However, plants can't directly use nitrogen to grow. The bacteria need to convert atmospheric nitrogen ( N2 gas) into a form that plants can use.

Nitrogen fixation is a symbiotic relationship between plants and microorganisms of nitrogen fixers, which in the process of symbiosis perform the binding of nitrogen, which enters the earth from the air (atmosphere).

It is a reduction process of converting the gaseous form of nitrogen from the air into the ammonia form that is available to plants.

5 0
3 years ago
Explain what a mosaic is and then explain why the term fluid mosaic model is used to describe the plasma membrane
zalisa [80]
Fluid mosaic is a term used to describe the current model of the cell membrane. Cell membranes are basically double layers (bilayers) of molecules called phospholipids.A mosaic is a structure made up of many different parts.<span> Mainly because of the way the plasma membrane is made up. It is fluid because it can wave and wobble like fluid, a bit sticky though. Due to the phospholipids sticking together. It is called mosaic because there are various proteins stuck inside the fluid creating a kind of patchwork or mosaic </span>
7 0
3 years ago
Cual es la causa para que los oceanos se expanden entre 3 y 10 cm por año
xeze [42]

Answer:

El calentamiento global causa que el nivel del mar se eleve, debido a que el hielo en las plataformas continentales se derrite y que el agua del océano se expande al calentarse.

7 0
3 years ago
Between a Black father bear (genotype BB) and a Brown mother bear (genotype bb), they had several baby bears.Black fur allele (B
Karolina [17]

Answer:

100% or 1

Explanation:

This question involves a gene coding for fur color in bears. According to the question, black fur allele (B) is dominant over the brown fur allele (b). This means that a bear heterozygous for fur color (Bb) will be phenotypically black.

In this question, a black father bear (genotype BB) and a brown mother bear (genotype bb) were crossed, the baby bears will all have a genotype Bb (see punnet square in the attached image). Since all the offsprings of this cross have genotype Bb, this means that 100% will have black fur.

6 0
3 years ago
Which is the primary consumer in this food chain? rabbit grass snake hawk
Arturiano [62]
Rabbit. It's the only herbivore in this chain.
6 0
3 years ago
Read 2 more answers
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