Answer:changes in environmental conditions
Explanation: The kingdom protista includes algae with chlorophyll and are autotrophic in nutrition.They may be Unicellular or multicelllular.some are colonial and others are filamentuous.some protista undergoes both sexual and asexual reproduction eg chlamydomonas and ulothrix.
In asexual reproduction,the cell divides by mitosis;first in the nucleus and chloroplast and later in the cytoplasm.
sexual reproduction occurs when conditions are quite unfavourable.This is essential because recombination of genes occurs during sexual reproduction ,thus leading to genetic variation.the zygote formed may remain in a dormant state until conditions becomes favourable
Answer: A. Mantle
" Heat rising and falling inside the mantle creates convection currents"
Answer:
The answer is A. Its leaves curl up on the edges.
Explanation:
I just took a test.
D:viruses are not killed by antibiotics.
The food we eat is our energy. When we eat food, we need to digest it and the eaten food, once digested, serves as our energy that we use up for daily needs.(maybe wants like the gym or something) If we eat too much food, it will be stored and we will become overweight over time. If we don't eat enough, we will lose weight because we're not getting enough energy in our bodies, so our bodies cannot get enough energy from the food eaten, so it looks elsewhere for stored energy(our fat and muscle cells Hope this helped:)
