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2 years ago

What is phylum? Explain.

Biology

2 answers:

In-s [12.5K]2 years ago

6 0

A principal taxonomic category that ranks above class and below kingdom, equivalent to the division in botany.

seropon [69]2 years ago

6 0

A principal taxonomic category that ranks above class and below kingdom

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Complete each statement by using the appropriate word or phrase from the list. Then place the statements in the order of an acti

timurjin [86]

Answer:

1. Potassium

2. increasing towards zero

3. hyperpolarization

4. voltage-regulated Potassium

Explanation:

Membrane potential can be defined as the difference in electric charges inside and outside of a cell. The resting membrane potential (RMP) occurs when there is no net current across the membrane and therefore the cell is in a non-excited state. At the RMP, sodium ions (Na+) are more concentrated inside the extracellular fluid (ECF) than inside the intracellular fluid (ICF), while potassium ions (K+) are more concentrated inside the ICF. The diffusion of K+ outside the cell triggers its hyperpolarization, by becoming the membrane potential more negative compared to the resting potential. As the potential nears +35 mV, the voltage-regulated potassium channels are open, thereby K+ ions leave the cell down its concentration gradient, while voltage-gated Na+ channels become saturated and inactivate.

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2 years ago

Male cones grow near the ____ of the plant while female cones are located near the ____ .

jarptica [38.1K]

1.B
2.A I think.......

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2 years ago

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Silica tetrahedra are able to link into long chains that share oxygen ions through the process of ________.

slava [35]

I don't know sorry
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2 years ago

A 5 km by 5 km plot has a weed count of 250 weeds. What would the population density be for the exact same plot six months later

Rasek [7]

So 200/25 is equal to 8, and because of that, the plot has 8 weeds per square kilometer.

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2 years ago

The LMand LNalleles at the MN blood-group locus exhibit codominance. Give the expected genotypes and phenotypes and their ratios

Dmitry [639]

Answer:

Please find the expected genotypes and phenotypes of the progenies of each cross below.

Explanation:

In the MN blood-group locus of the gene, alleles LM and LN exhibit codominance i.e one allele is not dominant or recessive to the other, hence, they are both expressed when they occur in a heterozygous state (MN).

Considering the following crosses (find the punnet square attached);

a)LMLM x LMLN - The progeny are LMLM and LMLN in the genotypic ratio 1:1. Phenotypic ratio is Blood type M (1) : blood type MN (1)

b) LNLN x LNLN - The progeny are all LNLN offsprings with a phenotypic and genotypic ratio 4:0. All offsprings will have a blood type N (4)

c) LMLN x LMLN - The progenies are LMLM, LMLN and LNLN in the genotypic ratio 1:2:1 respectively. The phenotypic ratio is Blood type M (1) : L

Blood type MN (2) : Blood type N (1)

d) LMLN x LNLN - The progeny are LMLN and LNLN with genotypic ratio 1:1 and phenotypic ratio blood type MN (1) : blood type N (1)

e) LMLM x LNLN - The progeny are all LMLN offsprings with penotypic ratio blood type MN (4)

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2 years ago