Biology Questions
Explore questions in the Biology category that you can ask Spark.E!
Pre-Fertilization- When the Secondary Oocyte releases from the follicle, it only has _____ hours of survival time in the uterine tubeand thus.... only that amount of time to be fertilized
Fertilization- So, only one sperm gets to fuse with the ____ ______ of the secondary oocyte
Fertilization- and with that... Oogenesis finally completes!!
Fertilization- We made it to fertilization!- how long does it last tho? is it as instant as pl think?
Fertilization- After membrane fusion, we've got another problem- if there are a bunch of other sperm working their way thru the layers of the secondary oocyte, we can't have Polyspermy! (multiple sperms fusing)so how can we prevent a Polyspermy Reactino?
Fertilization- so now that this one diploid nucleus has been duplicating into a TON of new cells... it eventually becomes something called the
Pre-Fertilization- BRO! - ok ok ok, let's go to the SPERM now- So at intercourse, we release like ______ of sperm in the mom
Pre-Fertilization- so, if the egg (well... technically Secondary Oocyte) gets released by the ovaries (follicles) at _________, we've gotta line up with it if we want a baby
Development- right at the second the sperm and egg meet (fertilization) we call it the
Development- what do we call the developing person (so the zygote, embryo, and fetus)
Development- Last Part of the Exam guys! Almost there!
Which of the following represents a scenario where the biological and morphological species concepts would yield the SAME conclusions about whether two populations are different species?Eastern and Western meadowlarks look extremely similar, have overlapping territories, and are not observed to interbreed in the wild.Kingsnakes and corn snakes both display banded patterns, where kingsnakes have alternating bright red, white, and black bands, and corn sakes have orange, red, and black bands. Their ranges overlap in the southeastern United States, and they occasionally interbreed in the wild, producing viable, fertile offspring.Fossils of horse ancestors show distinct morphological structural changes over evolutionary history. Some populations are highly localized in both space and time, others fossils appear across many geographic regions and throughout greater evolutionary time. There is no information available about interbreeding.None of the above are situations where the biological and morphological species concepts would yield the same conclusions
if two fossils are found to be similar but not identical what type of evidence could be used to determine the relatedness
All animals with eyes or eyespots that have been studied so far share a gene in common. When mutated, the gene Pax-6 causes the lack of eyes in fruit flies, tiny eyes in mice, and missing irises (and other eye parts) in humans. The sequence of Pax-6 in humans and mice is identical. There are so few sequence differences with fruit fly Pax-6 that the human/mouse version can cause eye formation in eyeless fruit flies, even though vertebrates and invertebrates last shared a common ancestor more than 500 million years ago. The appearance of Pax-6 in all animals with eyes can be explained in multiple ways.Based on the information given, which explanation is most likely?
A biologist studied a population of squirrels for 15 years. During that time, the population was never fewerthan 30 squirrels and never more than 45. Her data showed that over half of the squirrels born did not surviveto reproduce, because of competition for food and predation. In a single generation, 90% of the squirrels thatwere born lived to reproduce, and the population increased to 80. Which inference(s) about this populationmight be true?A) The amount of available food may have increased.B) The number of predators may have decreased.C) The squirrels of subsequent generations should show greater levels of genetic variation than previousgenerations, because squirrels that would not have survived in the past will now survive.D) A and B onlyE) A, B, and C
which of the following observations helped darwin shapw his concept od decent with modivation
Two species of frogs belonging to the same genus occasionally mate, but the offspring fail to develop and hatch. What is the mechanism for keeping the two frog species separate?
the origin of a new plant species by hubridization
which of the following activities occurs first in order to begin speciation
in addition to naming species, linnaeus also