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Sati [7]
4 years ago
5

Which statement best defines a protist?

Biology
1 answer:
Helga [31]4 years ago
8 0
Protists obtain food in 3 ways. They produce their own organic molecules, ingest, and absorb.  Ingestive protists ingest food, or engulf bacteria. These protists extend their cell wall and cell membrane forming a food vacuole around the food item. Inside the food vacuole, enzymes digest the food. Absorptive protists on the other hand, absorb food molecules  across their cell membrane which takes place through diffusion. Absorptive protists play a key role in decomposition. They are considered as important decomposers. Major producers  like photosynthetic protists  use light energy to manufacture  their own food.<span>
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PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA 40 POINTS* DONT SKIP :(( .!
Amanda [17]

Answer:

C

Explanation:

Animals that don't adapt to their new environment die

6 0
3 years ago
What is the difference between nutation and barycenter?
lukranit [14]

Generally speaking, precession is believed to <u>occur as a result of the gravitational forces exerted by the sun and moon as they revolve around the earth.</u> When an object revolves, its axis of rotation exhibits a nodding or swish motion. There is a wobble in the movement of precession. This phenomenon is caused by the gravitational pull exerted by one body upon another, resulting in nutation.

Hope this helps :)

3 0
2 years ago
A student is measuring the effect of different temperatures on the effect of enzymes in biological systems. What temperature ran
viktelen [127]

Answer:

A. 25 °C, 30 °C, 35 °C, 40 °C, 45 °C  

Explanation:

Each enzyme has a temperature at which it works best. In humans and many animals, that temperature is around body temperature (37 °C or 98.6 °F). Most enzymes are denatured and work poorly at 40 °C (104 °F).

That automatically eliminates Option B.

I would pick a temperature close to 37 °C (98.6 °F) and temperatures at intervals above and below that.

Option D is wrong because it includes no temperatures above body temperature.

Option C is wrong, because it includes temperatures of 45 °C and 55 °C, at which the enzymes will be denatured.

That leaves Option A as the best answer. It includes only one temperature above 40 °C.

8 0
3 years ago
How long have people been debating the idea of evolution?
umka21 [38]
About 160 years. After Charles Darwin came out with his theory people have been debating it.
7 0
4 years ago
Using your knowledge of Punnett squares and hybridization, what is the probability that a purebred monohybrid, dihybrid, three-f
Nimfa-mama [501]

Answer:

100%

Explanation:

No matter how many factors are in the cross, if an 2 purebred (homozygous individuals) are crossed, (one dominant, one recessive) the dominant phenotype will always be displayed.

Imagine a cross with between two individuals true breeding for 6 traits. One shows all dominant genotypes, one shows all recessive genotypes. The only gametes those individuals can pass on will always produce heterozygotes.

AABBCCDDEEFFGG x aabbccddeeffgg

The first individual can only give ABCDEFG alleles. The second individual can only give abcdefg alleles. Therefore, all offspring will be AaBbCcDdEeFfGg, and will therefore express the dominant trait.

8 0
3 years ago
Read 2 more answers
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