Užduočių lapas tema Biologija slaugos stojamiesiems egzaminams su atsakymais

Which of these hormones is a steroid?

1. ATestosterone
2. BGrowth hormone
3. CInsulin
4. DGlucagon

Which definition of a species is most often used for animals?

1. AAny organisms that look alike
2. BA group that can interbreed and have fertile offspring
3. CAll the animals that eat the same food
4. DAll of the different organisms that live together in one area

What is cell differentiation?

1. AThe process by which cells become specialised
2. BThe process by which a cell divides into two
3. CThe process by which cells die on purpose
4. DThe process by which DNA is copied

Raudonžiedis augalas kryžminamas su baltažiedžiu, ir visi palikuonys turi rausvus žiedus. Ką tai rodo?

1. AVisišką dominavimą
2. BKodominavimą
3. CNepilną dominavimą
4. DSu lytimi susijusį požymį

Ką reiškia „diploidinis"?

1. ALąstelė gali pasidalyti tik vieną kartą
2. BLąstelė turi du chromosomų rinkinius
3. CLąstelė neturi branduolio
4. DLąstelė turi vieną chromosomų rinkinį

Where does the oxygen released by photosynthesis come from?

1. AFrom chlorophyll that is used up
2. BFrom glucose that is broken down
3. CFrom carbon dioxide molecules that are split
4. DFrom water molecules that are split

Two plants are crossed, and about half of the offspring show the dominant trait and half show the recessive trait. What are the most likely genotypes of the parents?

1. AHomozygous dominant × heterozygous
2. BHeterozygous × heterozygous
3. CHomozygous dominant × homozygous recessive
4. DHeterozygous × homozygous recessive

A dihybrid cross gives offspring in a ratio of about 9 : 3 : 3 : 1. What does this suggest?

1. ABoth parents are heterozygous for two genes that assort independently
2. BThe two genes are tightly linked on the same chromosome
3. COne parent is AaBb and the other is homozygous aabb
4. DBoth parents are homozygous dominant for both genes