"Leydig Cells" secretes & synthesize androgens such as testosterone
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I would agree with your answer of C. As there would need to be calcium to start with and they seem to come from the sarcoplasmic reticulum
Las especies invasoras son animales, plantas u otros organismos que se desarrollan fuera de su área de distribución natural, en hábitats que no le son propios o con una abundancia inusual, produciendo alteraciones en la riqueza y diversidad de los ecosistemas. Cuando son transportados e introducidos por el ser humano en lugares fuera de su área de distribución natural, consiguiendo establecerse y dispersarse en la nueva región se les denomina especies exóticas invasoras resultando normalmente muy dañinas
When a BB male and a Bb female are crossed, 50% BB and 50% Bb genotypes are produced and a 100% black phenotype.
The entire number of genes that an organism receives from its parents makes up its genotype. Alleles, which are pairs of these genes, are found. One gene is dominant and one gene is recessive in each allele.
The dominant gene is always expressed in a cross if it is present. Only when a pair of alleles is made up of two recessive genes does the recessive gene express itself. In this instance, the white fur is subordinate to the black fur. White fur is represented as b, while black fur is represented as B.
We can see that when we cross the BB male and Bb female, we will get a genotype that is 50% BB and 50% Bb, as well as a phenotype that is 100% black fur.
Parents: BB x Bb
Gametes: B, B, and B, b
Offspring: BB, BB, Bb, Bb
The genotypic ratio = 1:1
The phenotypic ratio = 1:0
Genotype probabilities:
P(BB) = 2/4 = 0.5 or 50%
P(Bb) = 2/4 = 0.5 or 50%
Learn more about genotype here:
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Answer:
When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls. It can breed and spread quickly, taking over an area. Invasive species can change the food web in an ecosystem by destroying or replacing native food sources.
Explanation:
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