Biology Questions
Explore questions in the Biology category that you can ask Spark.E!
In guinea pigs the allele for rough coat (R) is dominant over the allele for a smooth coat (r). If a heterozygous guinea pig and a homozygous recessive guinea pig have babies, what type of coat would their offspring have?
What type of consumer eats both plants and animals?
Unlike the one-way flow of energy, ______ is always recycled within and between ecosystems.
What is the source of energy for all food webs?
are physical or chemical barriers that are used to block sperm from meeting the egg.
The zygote immediately begins cell division. The cell continues to divide while it travels toward the uterus. By day 5, it has divided enough times to be called a ________________.
Once the egg is fertilized it is called a ____________.
" (the pill, patch, ring, and injectable and implantable contraceptives) and the intrauterine device (IUD) are more effective than other alternatives in preventing pregnancy."
What contraceptive method is...- Not having vaginal sexual intercourse- Free- Available to all- can start at anytime
- Blocks sperm from entering the reproductive tractSide effects: none; unless allergic to latexAdvantages: Decrease risk of STIs, affordable, accessibleDisadvantages: Interruption of intercourse & possible breakage or defectsSTI Protection: Some but not perfectFailure rate when use perfectly: 2 - 5%Failure rate with actual use: 15 - 21%
Stop sperm from meeting the egg- _______________________- _____________________- ______________________- ___________________- ___________________- ___________________- ____________________
What happens fourth in the 1-4 week fetal development timeline?
The blastocyst reaches the uterus and begins to burrow into the endometrial lining where it implants. This process is called implantation. Once an _____________ (an implanted zygote) has implanted pregnancy has said to have occurred.w
the merging of a sperm and an ovum (egg). When a sperm enters an egg, fertilization is said to occur.
What happens fifth in the 1-4 week fetal development timeline?
What happens second in the 1-4 week fetal development timeline?
How are the rate and direction of evolution determined?
Selective sweeps will lead to the ____________ or ______________ of other genetic variants
When selection is strong and the beneficial allele increases in frequency quickly _______________________
Some protozoans have _______________ genomes that mammals or fish