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Sladkaya [172]
3 years ago
14

Semen and urine both exit the body through the _____.

Biology
2 answers:
Aleksandr [31]3 years ago
6 0
Urethra. 

Hope it helps! 
Brrunno [24]3 years ago
6 0

Answer: Urethra

Explanation: Semen can be defined as the fluid that contains sperm and it is released to fertilize the female eggs.

Urine can be defined as the liquid mixture of water that is consists of urea and some other waste products that is released upon urination.

Both of the secretion are excreted out of the body through the urethra.

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Natural selection can cause microevolution (change in allele frequencies), with fitness-increasing alleles becoming more common in the population.

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Introduction

We've already met a few different mechanisms of evolution. Genetic drift, migration, mutation...the list goes on. All of these mechanisms can make a population evolve, or change in its genetic makeup over generations.

But there's one mechanism of evolution that's a bit more famous than the others, and that's natural selection. What makes natural selection so special? Out of all the mechanisms of evolution, it's the only one that can consistently make populations adapted, or better-suited for their environment, over time.

You may have already seen natural selection as part of Darwin’s theory of evolution. In this article, we will dive deeper – in fact, deeper than Darwin himself could go. We will examine natural selection at the level of population genetics, in terms of allele, genotype, and phenotype frequencies.

Quick review of natural selection

Here is a quick reminder of how a population evolves by natural selection:

Organisms with heritable (genetically determined) features that help them survive and reproduce in a particular environment tend to leave more offspring than their peers.

If this continues over generations, the heritable features that aid survival and reproduction will become more and more common in the population.

The population will not only evolve (change in its genetic makeup and inherited traits), but will evolve in such a way that it becomes adapted, or better-suited, to its environment.

Explanation:

Here's my notes, i used and got it correct.

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