Most insects have small holes in the exoskeleton called spiracles, which open and close to regulate the air flow. The holes lead to the trachea. The correct answer is C, spiracles.
Answer:
Alleles are passed from the parents' sex chromosomes to the sex chromosomes in the offspring.
Explanation:
Sex-linked traits are simply traits that are associated, or found with, a particular sex chromosome (so X or Y). The way that alleles are passed down is through fertilization, but before that, the actual gametes (sex cells) involved in fertilization have to be synthesized. And because a sex linked trait is linked with a particular sex chromosome, that trait gets put into a gamete with that sex chromosome and is in turn passed down to the sex chromosomes of the offspring.
What are the characteristics of continental tropical air masses?
ANSWER:
They have warm, moist air.
Which description refers to stratus clouds?
ANSWER:
Covers all or most of the sky.
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Eukaryotic cells and prokaryotic cells contain a cytoplasm and ribosomes. Eukaryotic cells have organelles and a nucleus.
Prokaryotic cells were most likely to evolve first because of the simple structure.
Answer:
d
Explanation:
<em>Crossing over shuffles alleles on non-sister chromatids of homologous chromosomes.</em>
At the prophase I stage of meiosis, homologous chromosomes synapsed to form a four-chromatid structure known as tetrad. Exchange of chromosomal segments between non-sister chromatids of the tetrad then takes place, a process that results in the reshuffling of genes or alleles on the non-sister chromatids.
Hence, none of the answers is correct.
Correct option: d
