The image shows the 'popped' endosperms of popcorn. what purpose does the starchy endosperm serve? a) food storage b) reproduction c) photosynthesis d) water regulation

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils