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julia-pushkina [17]
3 years ago
6

2. The Köppen classification system is used as a classification system for

Biology
1 answer:
Klio2033 [76]3 years ago
7 0
It's used as a Climate classification system.
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The presence of what cellular structure distinguishes a plant cell from an animal cell?
horrorfan [7]
Cell membrane is the answer
7 0
3 years ago
Why are nitrogen-fixing bacteria important in ecosystems?
prohojiy [21]
Bacteria that change nitrogen gas from the atmosphere into solid nitrogen usable by plants are called nitrogen-fixing bacteria. These bacteria are found both in the soil and in symbiotic relationships with plants.
3 0
3 years ago
In pea plants, purple flowers are dominant to white flowers, and the purple and white alleles are represented with P and p, resp
amm1812

Answer: 75% of the plants are purple and 25% are white. The phenotypic ratio can be expressed as 3:1.

Explanation:

Heterozygous means that its genotype has two distinct alleles, i.e. a dominant and a recessive one. So the genotype of the plants is Pp, and each plant has two alleles since<u> they are diploid organisms, which have two copies of each gene. </u>

<u>Each plant produces gametes, which are haploids cells. That is, they only have one copy of each gene (one allele)</u>. So, the gametes produced by Pp have a P or p genotype.  During fertilization, the maternal and paternal gamete are fused to form a diploid zygote where their genotype will have one allele from the father and one from the mother.

By making this monohybrid cross, we cross the gametes of each parent in the punnett square (see picture)

In the offspring, we see one PP genotype (homozygous dominant), two Pp genotypes (heterozygous) and one pp genotype (homozygous recessive). <u>Since we know the P allele is dominant and it codes for purple color, a genotype only needs one P allele to express that phenotype</u>. So Pp and PP organisms are purple, and only pp is white. That means 75% of the plants are purple and 25% are white. The phenotypic ratio can be expressed as 3:1.

4 0
3 years ago
Based on this diagram, which of the following organisms would be directly affected by the removal of ALL of the rabbits in this
iragen [17]
Foxes Hawks and Owls will have to rely on other sources for food and be the most directly effected. You could make the argument that all the organisms will effected as some will see increased predation, while the plants will see a reduction in herbivores eating them.
8 0
3 years ago
Two umbilical arteries leave the __________ of the fetus, enter the umbilical cord, and deliver blood to the placenta.
Aloiza [94]

Answer:

internal iliac arteries

Explanation:

6 0
3 years ago
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