Question

1. “continuity” is dependent on whether living things

a. grow.
b. reproduce.
c. use energy.
d. respond to stimuli.

1. if continuity did not occur for a species, then that species would face the threat of

a. isolation.
b. extinction.
c. habitat loss.
d. propagation.

1. which of the following is associated with asexual reproduction?

a. i and ii only
b. i and iii only
c. ii and iii only
d. i, ii, and iii

1. which of the following is an example of asexual reproduction?

a. a paramecium splits into two new organisms
b. a black - capped chickadee uses a variety of songs to attract mates
c. a checkerspot butterfly transfers pollen from one wildflower to another
d. a male red fox successfully courts a vixen, resulting in a litter of four kits

1. a horse has 64 chromosomes. during sexual reproduction, how many chromosomes does each of the parents contribute to the offspring?

1. what are the building blocks of dna called?

a. sugars
b. chromatins
c. nucleotides
d. chromosomes

Explanation:

• Question 8: Continuity of life is mainly about the continuation of a species, which is achieved through reproduction.
• Question 9: If a species cannot ensure continuity (reproduce), it will face extinction as there will be no new individuals to carry on the species.
• Question 10: Asexual reproduction involves one parent, and the offspring have the exact genetic makeup as the parent. There is no genetic variation between offspring in a typical asexual reproduction (barring mutations).
• Question 11: A paramecium splitting into two new organisms is a form of asexual reproduction (binary fission). The other options involve mate - attraction (B, D) or pollination (C) which are related to sexual reproduction or plant - animal interactions for sexual reproduction.
• Question 12: During sexual reproduction, each parent contributes half of the chromosomes. If a horse has 64 chromosomes in its somatic cells, each parent (male and female) contributes 32 chromosomes (through gametes which are haploid).
• Question 13: DNA is made up of nucleotides. Sugars are part of the nucleotide structure, chromatins are complex of DNA and proteins, and chromosomes are structures that contain DNA.

Answer:

1. B. reproduce.
2. B. extinction.
3. B. I and III only.
4. A. a paramecium splits into two new organisms.
5. A. 32 (Male Horse), 32 (Female Horse).
6. C. nucleotides.