Answer:
1. The correct answer would be A. The fact that the bone structures are similar supports the theory that the animals shared a common ancestor.
Homologous structures refer to the organs or structures which are similar in structure but perform different functions as a result of adaptation towards different ecosystems.
2. The correct answer would be B. Eukarya
The organism contains a nucleus and other organelles including chloroplast. Thus, it can be correctly placed in Eukarya (eukaryotes).
3. The correct answer would be C. Plants have a two-part life cycle, spending part of their lives in a diploid phase and part in a haploid phase; humans spend their lives in a diploid phase and produce gametes that are haploid.
Plants usually show alternation of a generation that is, two-part life cycle. Humans do not show alternation of generation. They are diploid organisms which produce haploid gametes for reproduction.
4. The correct answer would be A. to defend the body from invading pathogens
The immune system is a defense system of our body. It protects our body from infections and toxins. It includes organs like thymus, lymph nodes, bone marrow et cetera.
5. The correct answer would be B. Plants produce glucose that can be broken down by cellular respiration; animals digest foods to obtain glucose for use in cellular respiration.
The energy demands of animals, as well as plants, are met by the process called cellular respiration. Glucose is the major substrate for this process. Plants are able to synthesize glucose through photosynthesis however, animals need to digest food to obtain glucose.
Answer:
No
Explanation: its related to climate
The null hypothesis is: there is no significant effect negative effect of increasing caffeine concentrations in nectar on the number of floral visits by bees.
If the number of floral visits by bees decreased with increasing nectar caffeine concentration, the null hypothesis is rejected. If there were no significant changes, the null hypothesis is not rejected.
<h3>What is a null hypothesis?</h3>
A null hypothesis a hypothesis which states that there is no significant difference between two populations or sample under study.
A null hypothesis can also state that there is no significant difference between variables in a study.
The experiment is to test potential negative effects of increasing caffeine concentrations in nectar on the number of floral visits by bees.
The null hypothesis is that there is no significant effect negative effect of increasing caffeine concentrations in nectar on the number of floral visits by bees.
The experiment will be designed as follows:
- Four potted plants with normal nectar caffeine concentration (serving as control), x2 nectar caffeine concentration, x3 nectar caffeine concentration, and x5 nectar caffeine concentration are obtained and kept in a garden.
- The number of floral visits by bees are recorded after 15 days.
If the number of floral visits by bees decreased with increasing nectar caffeine concentration, the null hypothesis is rejected. However, if there were no significant changes, the null hypothesis is not rejected.
In conclusion, a null hypothesis is a hypothesis of no significant difference.
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Answer:
Living things grow or develop.
Non-living things do not.
A. Natural Selection. This is because the weeds that are not resistant to it die out before they can reproduce, but the resistant ones grow to maturity and then reproduce, passing down the resistance gene. Over time, the resistance gene would become a normal thing in weeds, while the non-resistant gene would not exist anyone, since the gene could not be passed on.