Biology, 26.01.2021 20:10 eden1017

Four of the different types of finches that inhabit the Galapagos Islands are pictured above. Which of the following best explains the differences in traits between the finches? A. The finches originated from different types of birds that each arrived at the islands at different times.
B. Some finches stretched their beaks out to crack hard seed, and the trait was passed on to their offspring.
C. The finches are exposed to different temperatures throughout the year causing variation depending on the season.
D. The process of natural selection caused differences to arise due to differences in available food.

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Answer from: Quest

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

Answer from: Quest

This type of galaxy is an approximately ellipsoidal shape and a smooth, nearly featureless image. they are the largest single star systems, in the universe and are built by the collisions of many smaller galaxies.
Which phrases accurately describe an ellipictal galaxy

Which phrases accurately describe an ellipictal galaxy

Answer from: Quest

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.

explanation:

Answer from: Quest

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.

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Four of the different types of finches that inhabit the Galapagos Islands are pictured above. Which...