1.简单
What is phagocytosis?
- AA cell taking in small droplets of fluid
- BA cell engulfing large particles such as bacteria
- CA cell releasing hormones by exocytosis
- DA cell dividing into two identical daughter cells
2.简单
哪种结构存在于植物细胞中而不存在于动物细胞中?
- A核糖体
- B细胞壁
- C线粒体
- D细胞膜
3.简单
What is a Punnett square used for?
- AShowing the order of genes on a chromosome
- BMeasuring the size of a cell
- CCounting the chromosomes in a cell
- DPredicting the possible genotypes of offspring
4.中等
In which part of the chloroplast do the light-dependent reactions happen?
- AIn the stroma
- BIn the cell wall
- CIn the thylakoid membranes
- DIn the outer membrane
5.中等
What do nitrogen-fixing bacteria do?
- AThey release nitrogen gas from dead organisms into the air
- BThey turn carbon dioxide into sugar
- CThey break down proteins into glucose
- DThey convert nitrogen gas into compounds that plants can use
6.中等
A study finds a positive correlation between hours of exercise and lung capacity. What does this mean?
- AAs exercise increases, lung capacity tends to increase
- BAs exercise increases, lung capacity tends to decrease
- CThere is no link between the two variables
- DExercise has been proven to cause higher lung capacity
7.困难
At 100× total magnification, the field of view of a microscope is 2 mm wide. What is its width at 400×?
- A0.2 mm
- B8 mm
- C2 mm
- D0.5 mm
8.困难
Two parents are both AaBbCc, and the three genes assort independently. What is the probability that a child is aabbcc?
- A1/8
- B1/64
- C3/64
- D1/16
答案
- 1. B · A cell engulfing large particles such as bacteria
- 2. B · 细胞壁
- 3. D · Predicting the possible genotypes of offspring
- 4. C · In the thylakoid membranes
- 5. D · They convert nitrogen gas into compounds that plants can use
- 6. A · As exercise increases, lung capacity tends to increase
- 7. D · 0.5 mm
- 8. B · 1/64
完整分步解答:请在 examproblems.com 上练习本主题。