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3 years ago

Which characteristic do protozoans Foraminiferans (Phylum Sarcodines) and coccolithophores (Phylum Haptophyta) have in common?

Biology

2 answers:

shtirl [24]3 years ago

8 0

The common characteristic of those two organisms is hard spherical shells (exoskeleton).

Foraminiferans are single cell marine eukaryotes divided into granular endoplasm and transparent ectoplasm. Foraminiferans are enveloped with tests, hard shells, usually composed of calcium carbonate (sometimes from organic compounds or silica).

Coccolithophore is a unicellular, eukaryotic alga with special calcium carbonate plates (or scales) of uncertain function (coccoliths). Each unicellular alga is enclosed in its own collection of coccoliths, the which make up its exoskeleton- coccosphere.

Bogdan [553]3 years ago

4 0

The other answer is correct, but more specifically:

D. They both develop calcium carbonate structures.

The addition of calcium carbonate makes exoskeletons harder/stronger.

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8. In a population of beetles, there is a gene for color with two codominant alleles. The allele R leads to red beetles and the

Eddi Din [679]

Answer:

The genotypic frequency = 1:1

The phenotypic frequency = 1:1

Explanation:

Given that:

The allele → R = Red beetles

The allele → B = Blue beetles

Since the gene color shows a codominant allele

The Red Beetle = RR

The blue beetles will be = BB

The heterozygous beetle will be = RB

∴

The punnet square showing the crossing of RB × RR is:

R B

R RR RB

The result shows that we have two red beetles and two heterozygous beetles.

Hence;

The genotypic frequency = 1:1

The phenotypic frequency = 1:1

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3 years ago

A pea plant with round seeds has the genotype rr. if you cross this plant with a wrinkled-seed plant, genotype rr, what is the p

Lapatulllka [165]

I think you wrote this wrong? Is it not round rr vs wrinkled RR?? I'll answer it with that assumption:

You are crossing a rr with an RR:
You only get Rr back so they will phenotypically be all wrinkled

If you are crossing rr with an Rr (so a heterozygote wrinkled):
50% will be Rr (wrinkled)
50% will be rr (round)
See my picture for the Punnett Squares for both answers!

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3 years ago

This mineral is found inside cells and is associated with low blood pressure.

Mumz [18]

B.) potassium is the answer

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3 years ago

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Following knee replacement surgery 10 days earlier, an older adult client diagnosed with an infection in the knee has a synovial

Inga [223]

Answer:

<em>The correct option is B) Scientific paradigm</em>

Explanation:

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Other options, like option A, is not correct because a holistic paradigm focuses on the connection between the mind, body and the soul. Option C is false because the analytical paradigm is not a part of the major health belief system.

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3 years ago

What change would usually increase competition among the squirrel population in certain area

yaroslaw [1]

A makeshift increment in the squirrel proliferation rate.

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