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Anastasy [175]
3 years ago
6

There are _____ levels of intellectual disabilities on the modern continuum.

Biology
2 answers:
diamong [38]3 years ago
8 0

Answer:

four

Explanation:

Ivan3 years ago
7 0

Answer:

B) Four

Explanation:

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Protists vary in structure and function more than any other group of organisms. However, here are some common traits: a.All have
Sophie [7]

Answer:

a. eukaryotes

b. unicellular

c. autotrophs; heterotrophs

Explanation:

Protists represent a separate kingdom of eukaryotic organisms (ie., organisms whose cells have a nucleus). The most important features of protists include: 1- they are unicellular organisms, 2-contain mitochondria, 3-can be parasites, and 4-generally live in optimal conditions in moist or aquatic environments. In the past, protists were divided into Protozoa (animal-like organisms) and Protophyta (plant-like organisms), which nowadays we know are heterotrophic (also often parasitic) and photosynthetic protists, respectively.

3 0
3 years ago
While walking near a freshwater pond you see a small dead fish lying near the shallow edge of the water. There is a white string
rodikova [14]
Hi, thank your for posting your question here at Brainly.

The white stringy substance surrounding the fish may be one of these many choices. It could be an <span>euglena, amoeba, </span><span>water mold or </span><span>dinoflagellate. All of these are protists with the same white characteristic.</span>
6 0
3 years ago
Which of the following best describes an aspect of a membrane's molecular structure that causes it to be selectively permeable?
atroni [7]

Answer:

<u>d. Transport proteins within the membrane serve as a tunnel for molecules to enter the cell. </u>

<u />

Explanation:

Solutes are typically moved across the cell through either passive or active transport. The cells, surrounded by a bilipid layer or plasma membrane is amphiphlic- its polar, hydrophilic lipid heads face outwards, while their non-polar hydrophobic lipid tails face inwards towards each other.

While lipid-soluble molecules move across the layer easily, it is also difficult for charged and also large molecules to move across its surface, into the cell. Transmembrane channels, <u>embedded within the membrane</u>, help to maintain selective permeability as transport proteins, pores and gated channels. Simple diffusion happens as a method of passive transport in cells through plasma membranes.

The solutes travel through the plasma membrane in the process of diffusion from regions of high concentration to regions of low concentration; this occurs without the use of energy. <u>Molecules moving against their concentration require active transport mechanism to cross the membrane</u>.

3 0
3 years ago
Put numbers in the boxes to arrange the following statements in the order that they happen.
Olin [163]

Answer:

[3 ] pollination

[4 ] fertilisation

[ 2] pollen release

[5 ] embryo development

[1 ] pollen tube growth

[6 ] seed dispersal

3 0
2 years ago
Why does dna copy itself during the cell cycle?
natima [27]
Well the whole point of the cell cycle is to make more cells so it could be C, but it also wants the daughter cell to have the same AMOUNT of DNA, not the exact type (in meiosis) so B may be right, but most likely it is C
8 0
3 years ago
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